Photometric redshifts for the next generation of deep radio continuum surveys - I. template fitting

Monthly Notices of the Royal Astronomical Society 473 (2018) 2655-2672

KJ Duncan, MJI Brown, WL Williams, PN Best, V Buat, D Burgarella, MJ Jarvis, K Malek, SJ Oliver, HJA Röttgering, DJB Smith

© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a study of photometric redshift performance for galaxies and active galactic nuclei detected in deep radio continuum surveys. Using two multiwavelength data sets, over the NOAO Deep Wide Field Survey Boötes and COSMOS fields, we assess photometric redshift (photo-z) performance for a sample of ~4500 radio continuum sources with spectroscopic redshifts relative to those of ~63 000 non-radio-detected sources in the same fields. We investigate the performance of three photometric redshift template sets as a function of redshift, radio luminosity and infrared/X-ray properties.We find that no single template library is able to provide the best performance across all subsets of the radio-detected population, with variation in the optimum template set both between subsets and between fields. Through a hierarchical Bayesian combination of the photo-z estimates from all three template sets, we are able to produce a consensus photo-z estimate that equals or improves upon the performance of any individual template set.

The clustering and bias of radio-selected AGN and star-forming galaxies in the COSMOS field

Monthly Notices of the Royal Astronomical Society 474 (2018) 4133-4150

CL Hale, MJ Jarvis, I Delvecchio, PW Hatfield, M Novak, V Smolčić, G Zamorani

© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. Dark matter haloes in which galaxies reside are likely to have a significant impact on their evolution. We investigate the link between dark matter haloes and their constituent galaxies by measuring the angular two-point correlation function of radio sources, using recently released 3 GHz imaging over~2 deg2 of the Cosmological Evolution Survey (COSMOS) field. We split the radio source population into star-forming galaxies (SFGs) and active galactic nuclei (AGN), and further separate the AGN into radiatively efficient and inefficient accreters. Restricting our analysis to z < 1, we find SFGs have a bias, b = 1.5 -0.2 +0.1 , at a median redshift of z = 0.62. On the other hand, AGN are significantly more strongly clustered with b = 2.1 ± 0.2 at a median redshift of 0.7. This supports the idea that AGN are hosted by more massive haloes than SFGs. We also find low accretion rate AGN are more clustered (b = 2.9 ± 0.3) than high accretion rate AGN (b = 1.8 -0.5 +0.4 ) at the same redshift (z ~ 0.7), suggesting that low accretion rate AGN reside in higher mass haloes. This supports previous evidence that the relatively hot gas that inhabits the most massive haloes is unable to be easily accreted by the central AGN, causing them to be inefficient. We also find evidence that low accretion rate AGN appear to reside in halo masses of M h ~ 3-4 × 10 13 h -1 M⊙ at all redshifts. On the other hand, the efficient accreters reside in haloes of M h ~1-2×10 13 h -1 M⊙ at low redshift but can reside in relatively lower mass haloes at higher redshifts. This could be due to the increased prevalence of cold gas in lower mass haloes at z ≥ 1 compared to z < 1.

DES15E2mlf: a spectroscopically confirmed superluminous supernova that exploded 3.5 Gyr after the big bang


Y-C Pan, RJ Foley, M Smith, L Galbany, CB D'Andrea, S Gonzalez-Gaitan, MJ Jarvis, R Kessler, E Kovacs, C Lidman, RC Nichol, A Papadopoulos, M Sako, M Sullivan, TMC Abbott, FB Abdalla, J Annis, K Bechtol, A Benoit-Levy, D Brooks, E Buckley-Geer, DL Burke, AC Rosell, MC Kind, J Carretero, FJ Castander, CE Cunha, LN da Costa, S Desai, HT Diehl, P Doel, TF Eifler, DA Finley, B Flaugher, J Frieman, J Garcia-Bellido, DA Goldstein, D Gruen, RA Gruendl, J Gschwend, G Gutierrez, DJ James, AG Kim, E Krause, K Kuehn, N Kuropatkin, O Lahav, M Lima, MAG Maia, M March, JL Marshall, P Martini, R Miquel, P Nugent, AA Plazas, AK Romer, E Sanchez, V Scarpine, M Schubnell, I Sevilla-Noarbe, RC Smith, F Sobreira, E Suchyta, MEC Swanson, RC Thomas, AR Walker, DES Collaboration

Lensing is low: cosmology, galaxy formation or new physics?


A Leauthaud, S Saito, S Hilbert, A Barreira, S More, M White, S Alam, P Behroozi, K Bundy, J Coupon, T Erben, C Heymans, H Hildebrandt, R Mandelbaum, L Miller, B Moraes, MES Pereira, SA Rodriguez-Torres, F Schmidt, H-Y Shan, M Viel, F Villaescusa-Navarro

CODEX weak lensing: Concentration of galaxy clusters at Z ~ 0.5

Monthly Notices of the Royal Astronomical Society 468 (2017) 1092-1116

N Cibirka, ES Cypriano, F Brimioulle, D Gruen, T Erben, L van Waerbeke, L Miller, A Finoguenov, C Kirkpatrick, J Patrick Henry, E Rykoff, E Rozo, R Dupke, JP Kneib, H Shan, P Spinelli

© 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a stacked weak-lensing analysis of 27 richness selected galaxy clusters at 0.40 ≤ z ≤ 0.62 in the COnstrain Dark Energy with X-ray galaxy clusters (CODEX) survey. The fields were observed in five bands with the Canada-France-Hawaii Telescope (CFHT). We measure the stacked surface mass density profile with a 14σ significance in the radial range 0.1 < R Mpc h -1 < 2.5. The profile is well described by the halo model, with the main halo term following a Navarro-Frenk-White profile (NFW) profile and including the off-centring effect. We select the background sample using a conservative colour-magnitude method to reduce the potential systematic errors and contamination by cluster member galaxies. We perform a Bayesian analysis for the stacked profile and constrain the best-fitting NFW parameters M 200c = 6.6 +1.0 -0.8 × 10 14 h -1 M⊙ and c 200c = 3.7 +0.7 -0.6 . The off-centring effect was modelled based on previous observational results found for redMaPPer Sloan Digital Sky Survey clusters. Our constraints on M 200c and c 200c allow us to investigate the consistency with numerical predictions and select a concentration-mass relation to describe the high richness CODEX sample. Comparing our best-fitting values forM 200c and C 200c with other observational surveys at different redshifts, we find no evidence for evolution in the concentration-mass relation, though it could be mitigated by particular selection functions. Similar to previous studies investigating the X-ray luminosity-mass relation, our data suggest a lower evolution than expected from self-similarity.

ATCA detections of massive molecular gas reservoirs in dusty, high-z radio galaxies


I Heywood, Y Contreras, DJB Smith, A Cooray, L Dunne, L Gomez, E Ibar, RJ Ivison, MJ Jarvis, MJ Michalowski, DA Riechers, P van der Werf

The KMOS Redshift One Spectroscopic Survey ( KROSS): rotational velocities and angular momentum of z approximate to 0.9 galaxies


CM Harrison, HL Johnson, AM Swinbank, JP Stott, RG Bower, I Smail, AL Tiley, AJ Bunker, M Cirasuolo, D Sobral, RM Sharples, P Best, M Bureau, MJ Jarvis, G Magdis

Environmental quenching and galactic conformity in the galaxy cross-correlation signal


PW Hatfield, MJ Jarvis

A complete distribution of redshifts for submillimetre galaxies in the SCUBA-2 Cosmology Legacy Survey UDS field


DJB Smith, CC Hayward, MJ Jarvis, C Simpson

MIGHTEE: The MeerKAT International GHz Tiered Extragalactic Exploration

IOP Conference Series: Materials Science and Engineering 198 (2017)

AR Taylor, M Jarvis

© Published under licence by IOP Publishing Ltd. The MeerKAT telescope is the precursor of the Square Kilometre Array mid-frequency dish array to be deployed later this decade on the African continent. MIGHTEE is one of the MeerKAT large survey projects designed to pathfind SKA key science in cosmology and galaxy evolution. Through a tiered radio continuum deep imaging project including several fields totaling 20 square degrees to microJy sensitivities and an ultra-deep image of a single 1 square degree field of view, MIGHTEE will explore dark matter and large scale structure, the evolution of galaxies, including AGN activity and star formation as a function of cosmic time and environment, the emergence and evolution of magnetic fields in galaxies, and the magnetic counter part to large scale structure of the universe.

Next Generation Virgo Cluster Survey. XXI. the Weak Lensing Masses of the CFHTLS and NGVS RedGOLD Galaxy Clusters and Calibration of the Optical Richness

Astrophysical Journal 848 (2017)

C Parroni, S Mei, T Erben, LV Waerbeke, A Raichoor, J Ford, R Licitra, M Meneghetti, H Hildebrandt, L Miller, P Côté, G Covone, JC Cuillandre, PA Duc, L Ferrarese, SDJ Gwyn, TH Puzia

© 2017. The American Astronomical Society. All rights reserved. We measured stacked weak lensing cluster masses for a sample of 1323 galaxy clusters detected by the RedGOLD algorithm in the Canada-France-Hawaii Telescope Legacy Survey W1 and the Next Generation Virgo Cluster Survey at 0.2 < z < 0.5, in the optical richness range 10 < λ < 70. This is the most comprehensive lensing study of a ∼100% complete and ∼80% pure optical cluster catalog in this redshift range. We test different mass models, and our final model includes a basic halo model with a Navarro Frenk and White profile, as well as correction terms that take into account cluster miscentering, non-weak shear, the two-halo term, the contribution of the Brightest Cluster Galaxy, and an a posteriori correction for the intrinsic scatter in the mass-richness relation. With this model, we obtain a mass-richness relation of logM 200 M o = (14.46 ± 0.02) + (1.04 ± 0.09)log(λ 40) (statistical uncertainties). This result is consistent with other published lensing mass-richness relations. We give the coefficients of the scaling relations between the lensing mass and X-ray mass proxies, L X and T X , and compare them with previous results. When compared to X-ray masses and mass proxies, our results are in agreement with most previous results and simulations, and consistent with the expected deviations from self-similarity.

Galaxy And Mass Assembly: the 1.4 GHz SFR indicator, SFR-M-* relation and predictions for ASKAP-GAMA


LJM Davies, MT Huynh, AM Hopkins, N Seymour, SP Driver, AGR Robotham, IK Baldry, J Bland-Hawthorn, N Bourne, MN Bremer, MJI Brown, S Brough, M Cluver, MW Grootes, M Jarvis, J Loveday, A Moffet, M Owers, S Phillipps, E Sadler, L Wang, S Wilkins, A Wright

The LOFAR Two-metre Sky Survey I. Survey description and preliminary data release


TW Shimwell, HJA Rottgering, PN Best, WL Williams, TJ Dijkema, F de Gasperin, MJ Hardcastle, GH Heald, DN Hoang, A Horneffer, H Intema, EK Mahony, S Mandal, AP Mechev, L Morabito, JBR Oonk, D Rafferty, E Retana-Montenegro, J Sabater, C Tasse, RJ van Weeren, M Brueggen, G Brunetti, KT Chyzy, JE Conway, M Haverkorn, N Jackson, MJ Jarvis, JP McKean, GK Miley, R Morganti, GJ White, MW Wise, IM van Bemmel, R Beck, M Brienza, A Bonafede, GC Rivera, R Cassano, AO Clarke, D Cseh, A Deller, A Drabent, W van Driel, D Engels, H Falcke, C Ferrari, S Froehlich, MA Garrett, JJ Harwood, V Heesen, M Hoeft, C Horellou, FP Israel, AD Kapinska, M Kunert-Bajraszewska, DJ McKay, NR Mohan, E Orru, RF Pizzo, I Prandoni, DJ Schwarz, A Shulevski, M Sipior, DJB Smith, SS Sridhar, M Steinmetz, A Stroe, E Varenius, PP van der Werf, JA Zensus, JTL Zwart

Cosmology with AGN dust time lags-simulating the new VEILS survey


SF Honig, D Watson, M Kishimoto, P Gandhi, M Goad, K Horne, F Shankar, M Banerji, B Boulderstone, M Jarvis, M Smith, M Sullivan

Supernova rates from the SUDARE VST-Omegacam search II. Rates in a galaxy sample


MT Botticella, E Cappellaro, L Greggio, G Pignata, M Della Valle, A Grado, L Limatola, A Baruffolo, S Benetti, F Bufano, M Capaccioli, E Cascone, G Covone, D De Cicco, S Falocco, B Haeussler, V Harutyunyan, M Jarvis, L Marchetti, NR Napolitano, M Paolillo, A Pastorello, M Radovich, P Schipani, L Tomasella, M Turatto, M Vaccari

The XXL survey: First results and future


M Pierre, C Adami, M Birkinshaw, L Chiappetti, S Ettori, A Evrard, L Faccioli, F Gastaldello, P Giles, C Horellou, A Iovino, E Koulouridis, C Lidman, A Le Brun, B Maughan, S Maurogordato, I McCarthy, S Miyazaki, F Pacaud, S Paltani, M Plionis, T Reiprich, T Sadibekova, V Smolcic, S Snowden, J Surdej, M Tsirou, C Vignali, J Willis, S Alis, B Altieri, N Baran, C Benoist, A Bongiorno, M Bremer, A Butler, A Cappi, C Caretta, P Ciliegi, N Clerc, PS Corasaniti, J Coupon, J Delhaize, I Delvecchio, J Democles, S Desai, J Devriendt, Y Dubois, D Eckert, A Elyiv, A Farahi, C Ferraril, S Fotopoulou, W Forman, I Georgantopoulos, V Guglielmo, M Huynh, N Jerlin, C Jones, S Lavoie, J-P Le Fevre, M Lieu, M Kilbinger, F MaruIli, A Mantz, S McGee, J-B Melin, O Melnyk, L Moscardini, M Novak, E Piconcelli, B Poggianti, D Pomarede, E Pompei, T Ponman, MER Ceja, P Rana, D Rapetti, S Raychaudhury, M Ricci, H Rottgering, M Sahlen, J-L Sauvageot, C Schimd, M Sereno, GP Smith, K Umetsu, P Valageas, A Valotti, I Valtchanov, A Veropalumbo, B Ascaso, D Barnes, M De Petris, F Durret, M Donahue, M Ithana, M Jarvis, M Johnston-Hollitt, E Kalfountzou, S Kay, F La Franca, N Okabe, A Muzzin, A Rettura, F Ricci, J Ridl, G Risaliti, M Takizawa, P Thomas, N Truong

KiDS-450: the tomographic weak lensing power spectrum and constraints on cosmological parameters


F Kohlinger, M Viola, B Joachimi, H Hoekstra, E van Uitert, H Hildebrandt, A Choi, T Erben, C Heymans, S Joudaki, D Klaes, K Kuijken, J Merten, L Miller, P Schneider, EA Valentijn

An Application of Multi-band Forced Photometry to One Square Degree of SERVS: Accurate Photometric Redshifts and Implications for Future Science


K Nyland, M Lacy, A Sajina, J Pforr, D Farrah, G Wilson, J Surace, B Haussler, M Vaccari, M Jarvis

The LOFAR window on star-forming galaxies and AGNs - curved radio SEDs and IR-radio correlation at 0 < z < 2.5


GC Rivera, WL Williams, MJ Hardcastle, K Duncan, HJA Rottgering, PN Best, M Brueggen, KT Chyzy, CJ Conselice, F de Gasperin, D Engels, G Gurkan, HT Intema, MJ Jarvis, EK Mahony, GK Miley, LK Morabito, I Prandoni, J Sabater, DJB Smith, C Tasse, PP van der Werf, GJ White

Investigating the unification of LOFAR-detected powerful AGN in the Bootes field


LK Morabito, WL Williams, KJ Duncan, HJA Rottgering, G Miley, A Saxena, P Barthel, PN Best, M Bruggen, G Brunetti, KT Chyzy, D Engels, MJ Hardcastle, JJ Harwood, MJ Jarvis, EK Mahony, I Prandoni, TW Shimwell, A Shulevski, C Tasse