Publications


Quantifying baryon effects on the matter power spectrum and the weak lensing shear correlation

Journal of Cosmology and Astroparticle Physics 2019 (2019)

A Schneider, R Teyssier, J Stadel, NE Chisari, AMCL Brun, A Amara, A Refregier

© 2019 IOP Publishing Ltd and Sissa Medialab. Feedback processes from baryons are expected to strongly affect weak-lensing observables of current and future cosmological surveys. In this paper we present a new parametrisation of halo profiles based on gas, stellar, and dark matter density components. This parametrisation is used to modify outputs of gravity-only N-body simulations (following the prescription of [1]) in order to mimic baryonic effects on the matter density field. The resulting baryonic correction model relies on a few well motivated physical parameters and is able to reproduce the redshift zero clustering signal of hydrodynamical simulations at two percent accuracy below k∼10 h/Mpc. A detailed study of the baryon suppression effects on the matter power spectrum and the weak lensing shear correlation reveals that the signal is dominated by two parameters describing the slope of the gas profile in haloes and the maximum radius of gas ejection. We show that these parameters can be constrained with the observed gas fraction of galaxy groups and clusters from X-ray data. Based on these observations we predict a beyond percent effect on the power spectrum above k=0.2-1.0 h/Mpc with a maximum suppression of 15-25 percent around k∼ 10 h/Mpc. As a result, the weak lensing angular shear power spectrum is suppressed by 15-25 percent at scales beyond ℓ∼ 100-600 and the shear correlations ξ + and ξ - are affected at the 10-25 percent level below 5 and 50 arc-minutes, respectively. The relatively large uncertainties of these predictions are a result of the poorly known hydrostatic mass bias of current X-ray observations as well as the generic difficulty to observe the low density gas outside of haloes.


KROSS-SAMI: a direct IFS comparison of the Tully-Fisher relation across 8 Gyr since z approximate to 1

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482 (2019) 2166-2188

AL Tiley, M Bureau, L Cortese, CM Harrison, HL Johnson, JP Stott, AM Swinbank, I Smail, D Sobral, AJ Bunker, K Glazebrook, RG Bower, D Obreschkow, JJ Bryant, MJ Jarvis, J Bland-Hawthorn, G Magdis, AM Medling, SM Sweet, C Tonini, OJ Turner, RM Sharples, SM Croom, M Goodwin, IS Konstantopoulos, NPF Lorente, JS Lawrence, J Mould, MS Owers, SN Richards


The C-Band All-Sky Survey (C-BASS): constraining diffuse Galactic radio emission in the North Celestial Pole region

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485 (2019) 2844-2860

C Dickinson, A Barr, HC Chiang, C Copley, RDP Grumitt, SE Harper, HM Heilgendorff, LRP Jew, JL Jonas, ME Jones, JP Leahy, J Leech, EM Leitch, SJC Muchovej, TJ Pearson, MW Peel, ACS Readhead, J Sievers, MA Stevenson, AC Taylor


The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA-derived Quantities, Data Visualization Tools, and Stellar Library

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 240 (2019) ARTN 23

DS Aguado, R Ahumada, A Almeida, SF Anderson, BH Andrews, B Anguiano, E Aquino Ortiz, A Aragon-Salamanca, M Argudo-Fernandez, M Aubert, V Avila-Reese, C Badenes, SB Rembold, K Barger, J Barrera-Ballesteros, D Bates, J Bautista, RL Beaton, TC Beers, F Belfiore, M Bernardi, M Bershady, F Beutler, J Bird, D Bizyaev, GA Blanc, MR Blanton, M Blomqvist, AS Bolton, M Boquien, J Borissova, J Bovy, WN Brandt, J Brinkmann, JR Brownstein, K Bundy, A Burgasser, N Byler, MC Diaz, M Cappellari, R Carrera, B Cervantes Sodi, Y Chen, B Cherinka, PD Choi, H Chung, D Coffey, JM Comerford, J Comparat, K Covey, GDS Ilha, L da Costa, YS Dai, G Damke, J Darling, R Davies, K Dawson, V de Sainte Agathe, AD Machado, A Del Moro, N De Lee, AM Diamond-Stanic, HD Sanchez, J Donor, N Drory, HDM des Bourboux, C Duckworth, T Dwelly, G Ebelke, E Emsellem, S Escoffier, JG Fernandez-Trincado, D Feuillet, J-L Fischer, SW Fleming, A Fraser-McKelvie, G Freischlad, PM Frinchaboy, H Fu, L Galbany, R Garcia-Dias, DA Garcia-Hernandez, LA Garma Oehmichen, MA Geimba Maia, H Gil-Marin, K Grabowski, M Gu, H Guo, J Ha, E Harrington, S Hasselquist, CR Hayes, F Hearty, H Hernandez Toledo, H Hicks, DW Hogg, K Holley-Bockelmann, JA Holtzman, B-C Hsieh, JAS Hunt, HS Hwang, HJ Ibarra-Medel, CE Jimenez Angel, J Johnson, A Jones, H Jonsson, K Kinemuchi, J Kollmeier, C Krawczyk, K Kreckel, S Kruk, I Lacerna, T-W Lan, RR Lane, DR Law, Y-B Lee, C Li, J Lian, L Lin, Y-T Lin, C Lintott, D Long, P Longa-Pena, JT Mackereth, A de la Macorra, SR Majewski, O Malanushenko, A Manchado, C Maraston, V Mariappan, M Marinelli, R Marques-Chaves, T Masseron, KL Masters, RM McDermid, N Medina Pena, S Meneses-Goytia, A Merloni, M Merrifield, S Meszaros, D Minniti, R Minsley, D Muna, AD Myers, P Nair, JC do Nascimento, JA Newman, C Nitschelm, MD Olmstead, A Oravetz, D Oravetz, RA Ortega Minakata, Z Pace, N Padilla, PA Palicio, K Pan, H-A Pan, T Parikh, PJ III, S Peirani, S Penny, WJ Percival, I Perez-Fournon, T Peterken, MH Pinsonneault, A Prakash, MJ Raddick, A Raichoor, RA Riffel, R Riffel, H-W Rix, AC Robin, A Roman-Lopes, B Rose, AJ Ross, G Rossi, K Rowlands, KHR Rubin, SF Sanchez, JR Sanchez-Gallego, C Sayres, A Schaefer, RP Schiavon, JS Schimoia, E Schlafly, D Schlegel, DP Schneider, M Schultheis, H-J Seo, SJ Shamsi, Z Shao, S Shen, S Shetty, G Simonian, RJ Smethurst, J Sobeck, BJ Souter, A Spindler, DV Stark, KG Stassun, M Steinmetz, T Storchi-Bergmann, GS Stringfellow, G Suarez, J Sun, M Taghizadeh-Popp, MS Talbot, J Tayar, AR Thakar, D Thomas, P Tissera, R Tojeiro, NW Troup, E Unda-Sanzana, O Valenzuela, M Vargas-Magana, J Antonio Vazquez-Mata, D Wake, BA Weaver, A-M Weijmans, KB Westfall, V Wild, J Wilson, E Woods, R Yan, M Yang, O Zamora, G Zasowski, K Zhang, Z Zheng, G Zhu, JC Zinn, H Zou


The dependence of intrinsic alignment of galaxies on wavelength using KiDS and GAMA

Astronomy and Astrophysics 622 (2019)

C Georgiou, H Johnston, H Hoekstra, M Viola, K Kuijken, B Joachimi, NE Chisari, DJ Farrow, H Hildebrandt, BW Holwerda, A Kannawadi

© ESO 2019. The outer regions of galaxies are more susceptible to the tidal interactions that lead to intrinsic alignments of galaxies. The resulting alignment signal may therefore depend on the passband if the colours of galaxies vary spatially. To quantify this, we measured the shapes of galaxies with spectroscopic redshifts from the GAMA survey using deep gri imaging data from the KiloDegree Survey. The performance of the moment-based shape measurement algorithm DEIMOS was assessed using dedicated image simulations, which showed that the ellipticities could be determined with an accuracy better than 1% in all bands. Additional tests for potential systematic errors did not reveal any issues. We measure a significant difference of the alignment signal between the g,r and i-band observations. This difference exceeds the amplitude of the linear alignment model on scales below 2 Mpc h -1 . Separating the sample into central/satellite and red/blue galaxies, we find that the difference is dominated by red satellite galaxies.


Chandra centres for COSMOS X-ray galaxy groups: differences in stellar properties between central dominant and offset brightest group galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483 (2019) 3545-3565

G Gozaliasl, A Finoguenov, M Tanaka, K Dolag, F Montanari, CC Kirkpatrick, E Vardoulaki, HG Khosroshahi, M Salvato, C Laigle, HJ McCracken, O Ilbert, N Cappelluti, E Daddi, G Hasinger, P Capak, NZ Scoville, S Toft, F Civano, RE Griffiths, M Balogh, Y Li, J Ahoranta, S Mei, A Iovino, BMB Henriques, G Erfanianfar


The relation between galaxy density and radio jet power for 1.4 GHz VLA selected AGNs in Stripe 82

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482 (2019) 5156-5166

S Kolwa, MJ Jarvis, K McAlpine, I Heywood


Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1

ASTRONOMY & ASTROPHYSICS 626 (2019) ARTN A117

E Kankare, M Huber, SJ Smartt, K Chambers, KW Smith, O McBrien, T-W Chen, H Flewelling, T Lowe, E Magnier, A Schultz, C Waters, RJ Wainscoat, M Willman, D Wright, D Young, MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, C Alispach, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Arguelles, J Auffenberg, S Axani, P Backes, H Bagherpour, X Bai, A Barbano, SW Barwick, V Baum, R Bay, JJ Beatty, K-H Becker, JB Tjus, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Boerner, S Boeser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, RS Busse, T Carver, C Chen, E Cheung, D Chirkin, K Clark, L Classen, GH Collin, JM Conrad, P Coppin, P Correa, DF Cowen, R Cross, P Dave, JPAM de Andre, C De Clercq, JJ DeLaunay, H Dembinski, K Deoskar, S De Ridder, P Desiati, KD de Vries, G de Wasseige, M de With, T DeYoung, JC Diaz-Velez, H Dujmovic, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, A Franckowiak, E Friedman, A Fritz, TK Gaisser, J Gallagher, E Ganster, S Garrappa, L Gerhardt, K Ghorbani, T Glauch, T Glsenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, M Guenduez, C Haack, A Hallgren, L Halve, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, F Henningsen, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, T Hoinka, B Hokanson-Fasig, K Hoshina, F Huang, K Hultqvist, M Huennefeld, R Hussain, S In, N Iovine, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, D Kappesser, T Karg, M Karl, A Karle, U Katz, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, R Koirala, H Kolanoski, L Koepke, C Kopper, S Kopper, DJ Koskinen, M Kowalski, K Krings, G Krueckl, N Kulacz, S Kunwar, N Kurahashi, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, JP Lazar, K Leonard, M Leuermann, QR Liu, E Lohfink, CJL Mariscal, L Lu, F Lucarelli, J Lunemann, W Luszczak, J Madsen, G Maggi, KBM Mahn, Y Makino, K Mallot, S Mancina, IC Mari, R Maruyama, K Mase, R Maunu, K Meagher, M Medici, A Medina, M Meier, S Meighen-Berger, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momente, T Montaruli, RW Moore, M Moulai, R Nagai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, E O'Sullivan, T Palczewski, H Pandya, DV Pankova, N Park, P Peiffer, CP de los Heros, D Pieloth, E Pinat, A Pizzuto, M Plum, PB Price, GT Przybylski, C Raab, A Raissi, M Rameez, L Rauch, K Rawlins, IC Rea, R Reimann, B Relethford, G Renzi, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, I Safa, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, K Satalecka, M Schaufel, P Schlunder, T Schmidt, A Schneider, J Schneider, L Schumacher, S Sclafani, D Seckel, S Seunarine, M Silva, R Snihur, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, R Stein, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stossl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, F Tenholt, S Ter-Antonyan, A Terliuk, S Tilav, L Tomankova, C Tonnis, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, R Turcotte, CF Turley, B Ty, E Unger, MAU Elorrieta, M Usner, J Vandenbroucke, W Van Driessche, D van Eijk, N van Eijndhoven, S Vanheule, J van Santen, M Vraeghe, C Walck, A Wallace, M Wallraff, N Wandkowsky, TB Watson, C Weaver, MJ Weiss, J Weldert, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, N Whitehorn, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, K Woschnagg, G Wrede, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, J Nordin, Pan-STARRS, I Collaboration


Probing cosmic dawn with emission lines: predicting infrared and nebular line emission for ALMA and JWST

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 487 (2019) 5902-5921

H Katz, TP Galligan, T Kimm, J Rosdahl, MG Haehnelt, J Blaizot, J Devriendt, A Slyz, N Laporte, R Ellis


On the observed diversity of star formation efficiencies in Giant Molecular Clouds

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 486 (2019) 5482-5491

K Grisdale, O Agertz, F Renaud, AB Romeo, J Devriendt, A Slyz


Simulating and interpreting deep observations in the Hubble Ultra Deep Field with the JWST/NIRSpec low-resolution ‘prism’

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 483 (2019) 2621-2640

J Chevallard, E Curtis-Lake, S Charlot, P Ferruit, G Giardino, M Franx, MV Maseda, R Amorin, S Arribas, A Bunker, S Carniani, B Husemann, P Jakobsen, R Maiolino, J Pforr, TD Rawle, H-W Rix, R Smit, CJ Willott


Search for Multimessenger Sources of Gravitational Waves and High-energy Neutrinos with Advanced LIGO during Its First Observing Run, ANTARES, and IceCube

ASTROPHYSICAL JOURNAL 870 (2019) ARTN 134

A Albert, M Andre, M Anghinolfi, M Ardid, J-J Aubert, J Aublin, T Avgitas, B Baret, J Barrios-Marti, S Basa, B Belhorma, V Bertin, S Biagi, R Bormuth, J Boumaaza, S Bourret, MC Bouwhuis, H Branzas, R Bruijn, J Brunner, J Busto, A Capone, L Caramete, J Carr, S Celli, M Chabab, RC El Moursli, T Chiarusi, M Circella, JAB Coelho, A Coleiro, M Colomer, R Coniglione, H Costantini, P Coyle, A Creusot, AF Diaz, A Deschamps, C Distefano, I Di Palma, A Domi, R Dona, C Donzaud, D Dornic, D Drouhin, T Eberl, I El Bojaddaini, N El Khayati, D Elsaesser, A Enzenhoefer, A Ettahiri, F Fassi, I Felis, P Fermani, G Ferrara, L Fusco, P Gay, H Glotin, T Gregoire, RG Ruiz, K Graf, S Hallmann, H van Haren, AJ Heijboer, Y Hello, JJ Hernandez-Rey, J Hoessl, J Hofestaedt, G Illuminati, M de Jong, M Jongen, M Kadler, O Kalekin, U Katz, NR Khan-Chowdhury, A Kouchner, M Kreter, I Kreykenbohm, V Kulikovskiy, C Lachaud, R Lahmann, D Lefevre, E Leonora, G Levi, M Lotze, S Loucatos, G Maggi, M Marcelin, A Margiotta, A Marinelli, JA Martinez-Mora, R Mele, K Melis, P Migliozzi, A Moussa, S Navas, E Nezri, A Nunez, M Organokov, GE Pavalas, C Pellegrino, P Piattelli, V Popa, T Pradier, L Quinn, C Racca, N Randazzo, G Riccobene, A Sanchez-Losa, M Saldana, I Salvadori, DFE Samtleben, M Sanguineti, P Sapienza, F Schussler, M Spurio, T Stolarczyk, M Taiuti, Y Tayalati, A Trovato, B Vallage, V Van Elewyck, F Versari, D Vivolo, J Wilms, D Zaborov, JD Zornoza, J Zuniga, MG Aartsen, M Ackermann, J Adams, JA Aguilar, M Ahlers, M Ahrens, D Altmann, K Andeen, T Anderson, I Ansseau, G Anton, C Arguelles, J Auffenberg, S Axani, P Backes, H Bagherpour, X Bai, A Barbano, JP Barron, SW Barwick, V Baum, R Bay, JJ Beatty, JB Tjus, K-H Becker, S BenZvi, D Berley, E Bernardini, DZ Besson, G Binder, D Bindig, E Blaufuss, S Blot, C Bohm, M Boerner, F Bos, S Boeser, O Botner, E Bourbeau, J Bourbeau, F Bradascio, J Braun, M Brenzke, H-P Bretz, S Bron, J Brostean-Kaiser, A Burgman, RS Busse, T Carver, E Cheung, D Chirkin, K Clark, L Classen, GH Collin, JM Conrad, P Coppin, P Correa, DF Cowen, R Cross, P Dave, M Day, JPAM de Andre, C De Clercq, JJ DeLaunay, H Dembinski, K Deoskar, S De Ridder, P Desiati, KD de Vries, G de Wasseige, M de With, T DeYoung, JC Diaz-Velez, V di Lorenzo, H Dujmovic, JP Dumm, M Dunkman, E Dvorak, B Eberhardt, T Ehrhardt, B Eichmann, P Eller, PA Evenson, S Fahey, AR Fazely, J Felde, K Filimonov, C Finley, A Franckowiak, E Friedman, A Fritz, TK Gaisser, J Gallagher, E Ganster, S Garrappa, L Gerhardt, K Ghorbani, W Giang, T Glauch, T Gluesenkamp, A Goldschmidt, JG Gonzalez, D Grant, Z Griffith, C Haack, A Hallgren, L Halve, F Halzen, K Hanson, D Hebecker, D Heereman, K Helbing, R Hellauer, S Hickford, J Hignight, GC Hill, KD Hoffman, R Hoffmann, T Hoinka, B Hokanson-Fasig, K Hoshina, F Huang, M Huber, K Hultqvist, M Huennefeld, R Hussain, S In, N Iovine, A Ishihara, E Jacobi, GS Japaridze, M Jeong, K Jero, BJP Jones, P Kalaczynski, W Kang, A Kappes, D Kappesser, T Karg, A Karle, M Kauer, A Keivani, JL Kelley, A Kheirandish, J Kim, T Kintscher, J Kiryluk, T Kittler, SR Klein, R Koirala, H Kolanoski, L Koepke, C Kopper, S Kopper, JP Koschinsky, DJ Koskinen, M Kowalski, K Krings, M Kroll, G Krueckl, S Kunwar, N Kurahashi, A Kyriacou, M Labare, JL Lanfranchi, MJ Larson, F Lauber, K Leonard, M Leuermann, QR Liu, E Lohfink, CJL Mariscal, L Lu, J Lunemann, W Luszczak, J Madsen, KBM Mahn, Y Makino, S Mancina, IC Maris, R Maruyama, K Mase, R Maunu, K Meagher, M Medici, M Meier, T Menne, G Merino, T Meures, S Miarecki, J Micallef, G Momente, T Montaruli, RW Moore, M Moulai, R Nagai, R Nahnhauer, P Nakarmi, U Naumann, G Neer, H Niederhausen, SC Nowicki, DR Nygren, AO Pollmann, A Olivas, A O'Murchadha, E O'Sullivan, T Palczewski, H Pandya, DV Pankova, P Peiffer, JA Pepper, CP de los Heros, D Pieloth, E Pinat, A Pizzuto, M Plum, PB Price, GT Przybylski, C Raab, M Rameez, L Rauch, K Rawlins, IC Rea, R Reimann, B Relethford, G Renzi, E Resconi, W Rhode, M Richman, S Robertson, M Rongen, C Rott, T Ruhe, D Ryckbosch, D Rysewyk, I Safa, SES Herrera, A Sandrock, J Sandroos, M Santander, S Sarkar, K Satalecka, M Schaufel, P Schlunder, T Schmidt, A Schneider, J Schneider, S Schoeneberg, L Schumacher, S Sclafani, D Seckel, S Seunarine, J Soedingrekso, D Soldin, M Song, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, A Stasik, R Stein, J Stettner, A Steuer, T Stezelberger, RG Stokstad, A Stossl, NL Strotjohann, T Stuttard, GW Sullivan, M Sutherland, I Taboada, F Tenholt, S Ter-Antonyan, A Terliuk, S Tilav, PA Toale, MN Tobin, C Tonnis, S Toscano, D Tosi, M Tselengidou, CF Tung, A Turcati, R Turcotte, CF Turley, B Ty, E Unger, MAU Elorrieta, M Usner, J Vandenbroucke, W Van Driessche, D van Eijk, N van Eijndhoven, S Vanheule, J van Santen, M Vraeghe, C Walck, A Wallace, M Wallraff, FD Wandler, N Wandkowsky, TB Watson, A Waza, C Weaver, MJ Weiss, C Wendt, J Werthebach, S Westerhoff, BJ Whelan, N Whitehorn, K Wiebe, CH Wiebusch, L Wille, DR Williams, L Wills, M Wolf, J Wood, TR Wood, E Woolsey, K Woschnagg, G Wrede, DL Xu, XW Xu, Y Xu, JP Yanez, G Yodh, S Yoshida, T Yuan, BP Abbott, R Abbott, TD Abbott, S Abraham, F Acernese, K Ackley, C Adams, VB Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, G Allen, A Allocca, MA Aloy, PA Altin, A Amato, A Ananyeva, SB Anderson, WG Anderson, SV Angelova, S Antier, S Appert, K Arai, MC Araya, JS Areeda, M Arene, N Arnaud, KG Arun, S Ascenzi, G Ashton, SM Aston, P Astone, F Aubin, P Aufmuth, K AultONeal, C Austin, V Avendano, A Avila-Alvarez, S Babak, P Bacon, F Badaracco, MKM Bader, S Bae, PT Baker, F Baldaccini, G Ballardin, SW Ballmer, S Banagiri, JC Barayoga, SE Barclay, BC Barish, D Barker, K Barkett, S Barnum, F Barone, B Barr, L Barsotti, M Barsuglia, D Barta, J Bartlett, I Bartos, R Bassiri, A Basti, M Bawaj, JC Bayley, M Bazzan, B Becsy, M Bejger, I Belahcene, AS Bell, D Beniwal, BK Berger, G Bergmann, S Bernuzzi, JJ Bero, CPL Berry, D Bersanetti, A Bertolini, J Betzwieser, R Bhandare, J Bidler, IA Bilenko, SA Bilgili, G Billingsley, J Birch, R Birney, O Birnholtz, S Biscans, S Biscoveanu, A Bisht, M Bitossi, MA Bizouard, JK Blackburn, CD Blair, DG Blair, RM Blair, S Bloemen, N Bode, M Boer, Y Boetzel, G Bogaert, F Bondu, E Bonilla, R Bonnand, P Booker, BA Boom, CD Booth, R Bork, V Boschi, S Bose, K Bossie, V Bossilkov, J Bosveld, Y Bouffanais, A Bozzi, C Bradaschia, PR Brady, A Bramley, M Branchesi, JE Brau, T Briant, JH Briggs, F Brighenti, A Brillet, M Brinkmann, V Brisson, P Brockill, AF Brooks, DD Brown, S Brunett, A Buikema, T Bulik, HJ Bulten, A Buonanno, D Buskulic, C Buy, RL Byer, M Cabero, L Cadonati, G Cagnoli, C Cahillane, JC Bustillo, TA Callister, E Calloni, JB Camp, WA Campbell, KC Cannon, H Cao, J Cao, E Capocasa, F Carbognani, S Caride, MF Carney, G Carullo, JC Diaz, C Casentini, S Caudill, M Cavaglia, F Cavalier, R Cavalieri, G Cella, P Cerda-Duran, G Cerretani, E Cesarini, O Chaibi, K Chakravarti, SJ Chamberlin, M Chan, S Chao, P Charlton, EA Chase, E Chassande-Mottin, D Chatterjee, M Chaturvedi, BD Cheeseboro, HY Chen, X Chen, Y Chen, H-P Cheng, CK Cheong, HY Chia, A Chincarini, A Chiummo, G Cho, HS Cho, M Cho, N Christensen, Q Chu, S Chua, KW Chung, S Chung, G Ciani, AA Ciobanu, R Ciolfi, F Cipriano, A Cirone, F Clara, JA Clark, P Clearwater, F Cleva, C Cocchieri, E Coccia, P-F Cohadon, D Cohen, R Colgan, M Colleoni, CG Collette, C Collins, LR Cominsky, M Constancio Jr, L Conti, SJ Cooper, P Corban, TR Corbitt, I Cordero-Carrion, KR Corley, N Cornish, A Corsi, S Cortese, CA Costa, R Cotesta, MW Coughlin, SB Coughlin, J-P Coulon, ST Countryman, P Couvares, PB Covas, EE Cowan, DM Coward, MJ Cowart, DC Coyne, R Coyne, JDE Creighton, TD Creighton, J Cripe, M Croquette, SG Crowder, TJ Cullen, A Cumming, L Cunningham, E Cuoco, T Dal Canton, G Dalya, SL Danilishin, S D'Antonio, K Danzmann, A Dasgupta, CFDS Costa, LEH Datrier, V Dattilo, I Dave, M Davier, D Davis, EJ Daw, D DeBra, M Deenadayalan, J Degallaix, M De Laurentis, S Deleglise, W Del Pozzo, LM DeMarchi, N Demos, T Dent, M Denys, R De Pietri, J Derby, R De Rosa, C De Rossi, R DeSalvo, O de Varona, S Dhurandhar, MC Diaz, T Dietrich, L Di Fiore, M Di Giovanni, T Di Girolamo, A Di Lieto, B Ding, S Di Pace, F Di Renzo, A Dmitriev, Z Doctor, F Donovan, KL Dooley, S Doravari, I Dorrington, TP Downes, M Drago, JC Driggers, Z Du, J-G Ducoin, P Dupej, SE Dwyer, PJ Easter, TB Edo, MC Edwards, A Effler, P Ehrens, J Eichholz, SS Eikenberry, M Eisenmann, RA Eisenstein, RC Essick, H Estelles, D Estevez, ZB Etienne, T Etzel, M Evans, TM Evans, V Fafone, H Fair, S Fairhurst, X Fan, S Farinon, B Farr, WM Farr, EJ Fauchon-Jones, M Favata, M Fays, M Fazio, C Fee, J Feicht, MM Fejer, F Feng, A Fernandez-Galiana, I Ferrante, EC Ferreira, TA Ferreira, F Ferrini, F Fidecaro, I Fiori, D Fiorucci, M Fishbach, RP Fisher, JM Fishner, M Fitz-Axen, R Flaminio, M Fletcher, E Flynn, H Fong, JA Font, PWF Forsyth, J-D Fournier, S Frasca, F Frasconi, Z Frei, A Freise, R Frey, V Frey, P Fritschel, VV Frolov, P Fulda, M Fyffe, HA Gabbard, BU Gadre, SM Gaebel, JR Gair, L Gammaitoni, MR Ganija, SG Gaonkar, A Garcia, C Garcia-Quiros, F Garufi, B Gateley, S Gaudio, G Gaur, V Gayathri, G Gemme, E Genin, A Gennai, D George, J George, L Gergely, V Germain, S Ghonge, A Ghosh, A Ghosh, S Ghosh, B Giacomazzo, JA Giaime, KD Giardina, A Giazotto, K Gill, G Giordano, L Glover, P Godwin, E Goetz, R Goetz, B Goncharov, G Gonzalez, JMG Castro, A Gopakumar, ML Gorodetsky, SE Gossan, M Gosselin, R Gouaty, A Grado, C Graef, M Granata, A Grant, S Gras, P Grassia, C Gray, R Gray, G Greco, AC Green, R Green, EM Gretarsson, P Groot, H Grote, S Grunewald, P Gruning, GM Guidi, HK Gulati, Y Guo, A Gupta, MK Gupta, EK Gustafson, R Gustafson, L Haegel, O Halim, BR Hall, ED Hall, EZ Hamilton, G Hammond, M Haney, MM Hanke, J Hanks, C Hanna, OA Hannuksela, J Hanson, T Hardwick, K Haris, J Harms, GM Harry, IW Harry, C-J Haster, K Haughian, FJ Hayes, J Healy, A Heidmann, MC Heintze, H Heitmann, P Hello, G Hemming, M Hendry, IS Heng, J Hennig, AW Heptonstall, FJ Hernandez, M Heurs, S Hild, T Hinderer, D Hoak, S Hochheim, D Hofman, AM Holgado, NA Holland, K Holt, DE Holz, P Hopkins, C Horst, J Hough, EJ Howell, CG Hoy, A Hreibi, EA Huerta, D Huet, B Hughey, M Hulko, S Husa, SH Huttner, T Huynh-Dinh, B Idzkowski, A Iess, C Ingram, R Inta, G Intini, B Irwin, HN Isa, J-M Isac, M Isi, BR Iyer, K Izumi, T Jacqmin, SJ Jadhav, K Jani, NN Janthalur, P Jaranowski, AC Jenkins, J Jiang, DS Johnson, AW Jones, DI Jones, R Jones, RJG Jonker, L Ju, J Junker, CV Kalaghatgi, V Kalogera, B Kamai, S Kandhasamy, G Kang, JB Kanner, SJ Kapadia, S Karki, KS Karvinen, R Kashyap, M Kasprzack, S Katsanevas, E Katsavounidis, W Katzman, S Kaufer, K Kawabe, NV Keerthana, F Kefelian, D Keitel, R Kennedy, JS Key, FY Khalili, H Khan, I Khan, S Khan, Z Khan, EA Khazanov, M Khursheed, N Kijbunchoo, C Kim, JC Kim, K Kim, W Kim, WS Kim, Y-M Kim, C Kimball, EJ King, PJ King, M Kinley-Hanlon, R Kirchhoff, JS Kissel, L Kleybolte, JH Klika, S Klimenko, TD Knowles, P Koch, SM Koehlenbeck, G Koekoek, S Koley, V Kondrashov, A Kontos, N Koper, M Korobko, WZ Korth, I Kowalska, DB Kozak, V Kringel, N Krishnendu, A Krolak, G Kuehn, A Kumar, P Kumar, R Kumar, S Kumar, L Kuo, A Kutynia, S Kwang, BD Lackey, KH Lai, TL Lam, M Landry, BB Lane, RN Lang, J Lange, B Lantz, RK Lanza, A Lartaux-Vollard, PD Lasky, M Laxen, A Lazzarini, C Lazzaro, P Leaci, S Leavey, YK Lecoeuche, CH Lee, HK Lee, HM Lee, HW Lee, J Lee, K Lee, J Lehmann, A Lenon, N Leroy, N Letendre, Y Levin, J Li, KJL Li, TGF Li, X Li, F Lin, F Linde, SD Linker, TB Littenberg, J Liu, X Liu, RKL Lo, NA Lockerbie, LT London, A Longo, M Lorenzini, V Loriette, M Lormand, G Losurdo, JD Lough, CO Lousto, G Lovelace, ME Lower, H Lueck, D Lumaca, AP Lundgren, R Lynch, Y Ma, R Macas, S Macfoy, M MacInnis, DM Macleod, A Macquet, F Magana-Sandoval, LM Zertuche, RM Magee, E Majorana, I Maksimovic, A Malik, N Man, V Mandic, V Mangano, GL Mansell, M Manske, M Mantovani, F Marchesoni, F Marion, S Marka, Z Marka, C Markakis, AS Markosyan, A Markowitz, E Maros, A Marquina, S Marsat, F Martelli, IW Martin, RM Martin, DV Martynov, K Mason, E Massera, A Masserot, TJ Massinger, M Masso-Reid, S Mastrogiovanni, A Matas, F Matichard, L Matone, N Mavalvala, N Mazumder, JJ McCann, R McCarthy, DE McClelland, S McCormick, L McCuller, SC McGuire, J McIver, DJ McManus, T McRae, ST McWilliams, D Meacher, GD Meadors, M Mehmet, AK Mehta, J Meidam, A Melatos, G Mendell, RA Mercer, L Mereni, EL Merilh, M Merzougui, S Meshkov, C Messenger, C Messick, R Metzdorff, PM Meyers, H Miao, C Michel, H Middleton, EE Mikhailov, L Milano, AL Miller, A Miller, M Millhouse, JC Mills, MC Milovich-Goff, O Minazzoli, Y Minenkov, A Mishkin, C Mishra, T Mistry, S Mitra, VP Mitrofanov, G Mitselmakher, R Mittleman, G Mo, D Moffa, K Mogushi, SRP Mohapatra, M Montani, CJ Moore, D Moraru, G Moreno, S Morisaki, B Mours, CM Mow-Lowry, A Mukherjee, D Mukherjee, S Mukherjee, N Mukund, A Mullavey, J Munch, EA Muniz, M Muratore, PG Murray, I Nardecchia, L Naticchioni, RK Nayak, J Neilson, G Nelemans, TJN Nelson, M Nery, A Neunzert, KY Ng, S Ng, P Nguyen, D Nichols, S Nissanke, F Nocera, C North, LK Nuttall, M Obergaulinger, J Oberling, BD O'Brien, GD O'Dea, GH Ogin, JJ Oh, SH Oh, F Ohme, H Ohta, MA Okada, M Oliver, P Oppermann, RJ Oram, B O'Reilly, RG Ormiston, LF Ortega, R O'Shaughnessy, S Ossokine, DJ Ottaway, H Overmier, BJ Owen, AE Pace, G Pagano, MA Page, A Pai, SA Pai, JR Palamos, O Palashov, C Palomba, A Pal-Singh, H-W Pan, B Pang, PTH Pang, C Pankow, F Pannarale, BC Pant, F Paoletti, A Paoli, A Parida, W Parker, D Pascucci, A Pasqualetti, R Passaquieti, D Passuello, M Patil, B Patricelli, BL Pearlstone, C Pedersen, M Pedraza, R Pedurand, A Pele, S Penn, CJ Perez, A Perreca, HP Pfeiffer, M Phelps, KS Phukon, OJ Piccinni, M Pichot, F Piergiovanni, G Pillant, L Pinard, M Pirello, M Pitkin, R Poggiani, DYT Pong, S Ponrathnam, P Popolizio, EK Porter, J Powell, AK Prajapati, J Prasad, K Prasai, R Prasanna, G Pratten, T Prestegard, S Privitera, GA Prodi, LG Prokhorov, O Puncken, M Punturo, P Puppo, M Puerrer, H Qi, V Quetschke, PJ Quinonez, EA Quintero, R Quitzow-James, FJ Raab, H Radkins, N Radulescu, P Raffai, S Raja, C Rajan, B Rajbhandari, M Rakhmanov, KE Ramirez, A Ramos-Buades, J Rana, K Rao, P Rapagnani, V Raymond, M Razzano, J Read, T Regimbau, L Rei, S Reid, DH Reitze, W Ren, F Ricci, CJ Richardson, JW Richardson, PM Ricker, K Riles, M Rizzo, NA Robertson, R Robie, F Robinet, A Rocchi, L Rolland, JG Rollins, VJ Roma, M Romanelli, R Romano, CL Romel, JH Romie, K Rose, D Rosinska, SG Rosofsky, MP Ross, S Rowan, A Ruediger, P Ruggi, G Rutins, K Ryan, S Sachdev, T Sadecki, M Sakellariadou, L Salconi, M Saleem, A Samajdar, L Sammut, EJ Sanchez, LE Sanchez, N Sanchis-Gual, V Sandberg, JR Sanders, KA Santiago, N Sarin, B Sassolas, PR Saulson, O Sauter, RL Savage, P Schale, M Scheel, J Scheuer, F Schiettekatte, P Schmidt, R Schnabel, RMS Schofield, A Schoenbeck, E Schreiber, BW Schulte, BF Schutz, SG Schwalbe, J Scott, SM Scott, E Seidel, D Sellers, AS Sengupta, N Sennett, D Sentenac, V Sequino, A Sergeev, Y Setyawati, DA Shaddock, T Shaffer, MS Shahriar, MB Shaner, L Shao, P Sharma, P Shawhan, H Shen, R Shink, DH Shoemaker, DM Shoemaker, S ShyamSundar, K Siellez, M Sieniawska, D Sigg, AD Silva, LP Singer, N Singh, A Singhal, AM Sintes, S Sitmukhambetov, V Skliris, BJJ Slagmolen, TJ Slaven-Blair, JR Smith, RJE Smith, S Somala, EJ Son, B Sorazu, F Sorrentino, T Souradeep, E Sowell, AP Spencer, AK Srivastava, V Srivastava, K Staats, C Stachie, M Standke, DA Steer, M Steinke, J Steinlechner, S Steinlechner, D Steinmeyer, SP Stevenson, D Stocks, R Stone, DJ Stops, KA Strain, G Stratta, SE Strigin, A Strunk, R Sturani, AL Stuver, V Sudhir, TZ Summerscales, L Sun, S Sunil, J Suresh, PJ Sutton, BL Swinkels, MJ Szczepanczyk, M Tacca, SC Tait, C Talbot, D Talukder, DB Tanner, M Tapai, A Taracchini, JD Tasson, R Taylor, F Thies, M Thomas, P Thomas, SR Thondapu, KA Thorne, E Thrane, S Tiwari, S Tiwari, V Tiwari, K Toland, M Tonelli, Z Tornasi, A Torres-Forne, CI Torrie, D Toyra, F Travasso, G Traylor, MC Tringali, L Trozzo, R Trudeau, KW Tsang, M Tse, R Tso, L Tsukada, D Tsuna, D Tuyenbayev, K Ueno, D Ugolini, CS Unnikrishnan, AL Urban, SA Usman, H Vahlbruch, G Vajente, G Valdes, N van Bakel, M van Beuzekom, JFJ van den Brand, C Van Den Broeck, DC Vander-Hyde, L van der Schaaf, HJV van, AA van Veggel, M Vardaro, V Varma, S Vass, M Vasuth, A Vecchio, G Vedovato, J Veitch, PJ Veitch, K Venkateswara, G Venugopalan, D Verkindt, F Vetrano, A Vicere, AD Viets, DJ Vine, J-Y Vinet, S Vitale, T Vo, H Vocca, C Vorvick, SP Vyatchanin, AR Wade, LE Wade, M Wade, R Walet, M Walker, L Wallace, S Walsh, G Wang, H Wang, JZ Wang, WH Wang, YF Wang, RL Ward, ZA Warden, J Warner, M Was, J Watchi, B Weaver, L-W Wei, M Weinert, AJ Weinstein, R Weiss, F Wellmann, L Wen, EK Wessel, P Wessels, JW Westhouse, K Wette, JT Whelan, BF Whiting, C Whittle, DM Wilken, D Williams, AR Williamson, JL Willis, B Willke, MH Wimmer, W Winkler, CC Wipf, H Wittel, G Woan, J Woehler, JK Wofford, J Worden, JL Wright, DS Wu, DM Wysocki, L Xiao, H Yamamoto, CC Yancey, L Yang, MJ Yap, M Yazback, DW Yeeles, H Yu, H Yu, SHR Yuen, M Yvert, AK Zadrozny, A Zadrozny, M Zanolin, T Zelenova, J-P Zendri, M Zevin, J Zhang, L Zhang, T Zhang, C Zhao, M Zhou, Z Zhou, XJ Zhu, ME Zucker, J Zweizig, ANTARES Collaboration, ANTARES Collaboration, I Collaboration, I Collaboration, LIGOS Collaboration, LIGOS Collaboration, V Collaboration


LoTSS DR1: Double-double radio galaxies in the HETDEX field

Astronomy and Astrophysics 622 (2019)

VH Mahatma, MJ Hardcastle, WL Williams, PN Best, JH Croston, K Duncan, B Mingo, R Morganti, M Brienza, RK Cochrane, G Gürkan, JJ Harwood, MJ Jarvis, M Jamrozy, N Jurlin, LK Morabito, HJA Röttgering, J Sabater, TW Shimwell, DJB Smith, A Shulevski, C Tasse

© ESO 2019. Context. Double-double radio galaxies (DDRGs) represent a short but unique phase in the life-cycle of some of the most powerful radio-loud active galactic nuclei (RLAGN). These galaxies display large-scale remnant radio plasma in the intergalactic medium left behind by a past episode of active galactic nuclei (AGN) activity, and meanwhile, the radio jets have restarted in a new episode. The knowledge of what causes the jets to switch off and restart is crucial to our understanding of galaxy evolution, while it is important to know if DDRGs form a host galaxy dichotomy relative to RLAGN. Aims. The sensitivity and field of view of LOFAR enables the observation of DDRGs on a population basis rather than single-source observations. Using statistical comparisons with a control sample of RLAGN, we may obtain insights into the nature of DDRGs in the context of their host galaxies, where physical differences in their hosts compared to RLAGN as a population may allow us to infer the conditions that drive restarting jets. Methods. We utilised the LOFAR Two-Metre Sky Survey (LoTSS) DR1, using a visual identification method to compile a sample of morphologically selected candidate DDRGs, showing two pairs of radio lobes. To confirm the restarted nature in each of the candidate sources, we obtained follow-up observations with the Karl. G. Jansky Very Large Array (VLA) at higher resolution to observe the inner lobes or restarted jets, the confirmation of which created a robust sample of 33 DDRGs. We created a comparison sample of 777 RLAGN, matching the luminosity distribution of the DDRG sample, and compared the optical and infrared magnitudes and colours of their host galaxies. Results. We find that there is no statistically significant difference in the brightness of the host galaxies between double-doubles and single-cycle RLAGN. The DDRG and RLAGN samples also have similar distributions in WISE mid-infrared colours, indicating similar ages of stellar populations and dust levels in the hosts of DDRGs. We conclude that DDRGs and "normal" RLAGN are hosted by galaxies of the same type, and that DDRG activity is simply a normal part of the life cycle of RLAGN. Restarted jets, particularly for the class of low-excitation radio galaxies, rather than being a product of a particular event in the life of a host galaxy, must instead be caused by smaller scale changes, such as in the accretion system surrounding the black hole.


LOFAR observations of the XMM-LSS field

ASTRONOMY & ASTROPHYSICS 622 (2019) ARTN A4

CL Hale, W Williams, MJ Jarvis, MJ Hardcastle, LK Morabito, TW Shimwell, C Tasse, PN Best, JJ Harwood, I Heywood, I Prandoni, HJA Rottgering, J Sabater, DJB Smith, RJ van Weeren


The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes

ASTRONOMY & ASTROPHYSICS 622 (2019) ARTN A3

KJ Duncan, J Sabater, HJA Rottgering, MJ Jarvis, DJB Smith, PN Best, JR Callingham, R Cochrane, JH Croston, MJ Hardcastle, B Mingo, L Morabito, D Nisbet, I Prandoni, TW Shimwell, C Tasse, GJ White, WL Williams, L Alegre, KT Chyzy, G Gurkan, M Hoeft, R Kondapally, AP Mechev, GK Miley, DJ Schwarz, RJ van Weeren


LoTSS/HETDEX: Optical quasars I. Low-frequency radio properties of optically selected quasars

ASTRONOMY & ASTROPHYSICS 622 (2019) ARTN A11

G Gurkan, MJ Hardcastle, PN Best, LK Morabito, I Prandoni, MJ Jarvis, KJ Duncan, GC Rivera, JR Callingham, RK Cochrane, JH Croston, G Heald, B Mingo, S Mooney, J Sabater, HJA Rottgering, TW Shimwell, DJB Smith, C Tasse, WL Williams


The LOFAR Two-metre Sky Survey II. First data release

ASTRONOMY & ASTROPHYSICS 622 (2019) ARTN A1

TW Shimwell, C Tasse, MJ Hardcastle, AP Mechev, WL Williams, PN Best, HJA Rottgering, JR Callingham, TJ Dijkema, F de Gasperin, DN Hoang, B Hugo, M Mirmont, JBR Oonk, I Prandoni, D Rafferty, J Sabater, O Smirnov, RJ van Weeren, GJ White, M Atemkeng, L Bester, E Bonnassieux, M Bruggen, G Brunetti, KT Chyzy, R Cochrane, JE Conway, JH Croston, A Danezi, K Duncan, M Haverkorn, GH Heald, M Iacobelli, HT Intema, N Jackson, M Jamrozy, MJ Jarvis, R Lakhoo, M Mevius, GK Miley, L Morabito, R Morganti, D Nisbet, E Orru, S Perkins, RF Pizzo, C Schrijvers, DJB Smith, R Vermeulen, MW Wise, L Alegre, DJ Bacon, IM van Bemmel, RJ Beswick, A Bonafede, A Botteon, S Bourke, M Brienza, GC Rivera, R Cassano, AO Clarke, CJ Conselice, RJ Dettmar, A Drabent, C Dumba, KL Emig, TA Ensslin, C Ferrari, MA Garrett, RT Genova-Santos, A Goyal, G Gurkan, C Hale, JJ Harwood, V Heesen, M Hoeft, C Horellou, C Jackson, G Kokotanekov, R Kondapally, M Kunert-Bajraszewska, V Mahatma, EK Mahony, S Mandal, JP McKean, A Merloni, B Mingo, A Miskolczi, S Mooney, B Nikiel-Wroczynski, SP O'Sullivan, J Quinn, W Reich, C Roskowinski, A Rowlinson, F Savini, A Saxena, DJ Schwarz, A Shulevski, SS Sridhar, HR Stacey, S Urquhart, MHD van der Wiel, E Varenius, B Webster, A Wilber


The formation and evolution of low-surface-brightness galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485 (2019) 796-818

G Martin, S Kaviraj, C Laigle, JEG Devriendt, RA Jackson, S Peirani, Y Dubois, C Pichon, A Slyz


Consistent cosmic shear in the face of systematics: A B -mode analysis of KiDS-450, DES-SV and CFHTLenS

Astronomy and Astrophysics 624 (2019)

M Asgari, C Heymans, H Hildebrandt, L Miller, P Schneider, A Amon, A Choi, T Erben, C Georgiou, J Harnois-Deraps, K Kuijken

© ESO 2019. We analyse three public cosmic shear surveys; the Kilo-Degree Survey (KiDS-450), the Dark Energy Survey (DES-SV) and the Canada France Hawaii Telescope Lensing Survey (CFHTLenS). Adopting the "COSEBIs" statistic to cleanly and completely separate the lensing E-modes from the non-lensing B-modes, we detect B-modes in KiDS-450 and CFHTLenS at the level of ∼2.7σ. For DES-SV we detect B-modes at the level of 2.8σ in a non-tomographic analysis, increasing to a 5.5σB-mode detection in a tomographic analysis. In order to understand the origin of these detected B-modes we measure the B-mode signature of a range of different simulated systematics including PSF leakage, random but correlated PSF modelling errors, camera-based additive shear bias and photometric redshift selection bias. We show that any correlation between photometric-noise and the relative orientation of the galaxy to the point-spread-function leads to an ellipticity selection bias in tomographic analyses. This work therefore introduces a new systematic for future lensing surveys to consider. We find that the B-modes in DES-SV appear similar to a superposition of the B-mode signatures from all of the systematics simulated. The KiDS-450 and CFHTLenS B-mode measurements show features that are consistent with a repeating additive shear bias.


Towards emulating cosmic shear data: Revisiting the calibration of the shear measurements for the Kilo-Degree Survey

Astronomy and Astrophysics 624 (2019)

A Kannawadi, H Hoekstra, L Miller, M Viola, I Fenech Conti, R Herbonnet, T Erben, C Heymans, H Hildebrandt, K Kuijken, M Vakili, AH Wright

© ESO 2019. Exploiting the full statistical power of future cosmic shear surveys will necessitate improvements to the accuracy with which the gravitational lensing signal is measured. We present a framework for calibrating shear with image simulations that demonstrates the importance of including realistic correlations between galaxy morphology, size, and more importantly, photometric redshifts. This realism is essential to ensure that selection and shape measurement biases can be calibrated accurately for a tomographic cosmic shear analysis. We emulate Kilo-Degree Survey (KiDS) observations of the COSMOS field using morphological information from Hubble Space Telescope imaging, faithfully reproducing the measured galaxy properties from KiDS observations of the same field. We calibrate our shear measurements from lensfit, and find through a range of sensitivity tests that lensfit is robust and unbiased within the allowed two per cent tolerance of our study. Our results show that the calibration has to be performed by selecting the tomographic samples in the simulations, consistent with the actual cosmic shear analysis, because the joint distributions of galaxy properties are found to vary with redshift. Ignoring this redshift variation could result in misestimating the shear bias by an amount that exceeds the allowed tolerance. To improve the calibration for future cosmic shear analyses, it will also be essential to correctly account for the measurement of photometric redshifts, which requires simulating multi-band observations.

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