Publications


No evidence for Population III stars or a direct collapse black hole in the z=6.6 Lyman alpha emitter 'CR7'

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 469 (2017) 448-458

RAA Bowler, RJ McLure, JS Dunlop, DJ McLeod, ER Stanway, JJ Eldridge, MJ Jarvis


Calibrating photometric redshifts with intensity mapping observations

PHYSICAL REVIEW D 96 (2017) ARTN 043515

D Alonso, PG Ferreira, MJ Jarvis, K Moodley


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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467 (2017) 3024-3047

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


KiDS-450: Testing extensions to the standard cosmological model

Monthly Notices of the Royal Astronomical Society 471 (2017) 1259-1279

S Joudaki, A Mead, C Blake, A Choi, J de Jong, T Erben, IF Conti, R Herbonnet, C Heymans, H Hildebrandt, H Hoekstra, B Joachimi, D Klaes, F Köhlinger, K Kuijken, J McFarland, L Miller, P Schneider, M Viola

© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We test extensions to the standard cosmological model with weak gravitational lensing tomography using 450 deg 2 of imaging data from the Kilo Degree Survey (KiDS). In these extended cosmologies, which include massive neutrinos, non-zero curvature, evolving dark energy, modified gravity and running of the scalar spectral index, we also examine the discordance between KiDS and cosmic microwave background (CMB) measurements from Planck. The discordance between the two data sets is largely unaffected by a more conservative treatment of the lensing systematics and the removal of angular scales most sensitive to non-linear physics. The only extended cosmology that simultaneously alleviates the discordance with Planck and is at least moderately favoured by the data includes evolving dark energy with a time-dependent equation of state (in the form of the w 0 - w a parametrization). In this model, the respective constraints agree at the 1σ level, and there is 'substantial concordance' between the KiDS and Planck data sets when accounting for the full parameter space. Moreover, the Planck constraint on the Hubble constant is wider than in Λ cold dark matter (ΛCDM) and in agreement with the Riess et al. (2016) direct measurement of H 0 . The dark energy model is moderately favoured as compared to ΛCDM when combining the KiDS and Planck measurements, and marginalized constraints in the w 0 -w a plane are discrepant with a cosmological constant at the 3σ level. KiDS further constrains the sum of neutrino masses to 4.0 eV (95% CL), finds no preference for time or scale-dependent modifications to the metric potentials, and is consistent with flatness and no running of the spectral index.


Calibration of weak-lensing shear in the Kilo-Degree Survey

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467 (2017) 1627-1651

IF Conti, R Herbonnet, H Hoekstra, J Merten, L Miller, M Viola


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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 465 (2017) 1297-1307

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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467 (2017) 1965-1983

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


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.


Evidence that the AGN dominates the radio emission in z similar to 1 radio-quiet quasars

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468 (2017) 217-238

SV White, MJ Jarvis, E Kalfountzou, MJ Hardcastle, A Verma, JMC Orjales, J Stevens


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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 464 (2017) 1693-1703

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

ASTRONOMY & ASTROPHYSICS 598 (2017) ARTN A50

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


Observational evidence that positive and negative AGN feedback depends on galaxy mass and jet power

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 471 (2017) 28-58

E Kalfountzou, JA Stevens, MJ Jarvis, MJ Hardcastle, D Wilner, M Elvis, MJ Page, M Trichas, DJB Smith


The prevalence of core emission in faint radio galaxies in the SKA Simulated Skies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 471 (2017) 908-913

IH Whittam, MJ Jarvis, DA Green, I Heywood, JM Riley


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

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 230 (2017) ARTN 9

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


Galaxy And Mass Assembly (GAMA): the environments of high- and low-excitation radio galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 469 (2017) 4584-4599

JHY Ching, SM Croom, EM Sadler, ASG Robotham, S Brough, IK Baldry, J Bland-Hawthorn, M Colless, SP Driver, BW Holwerda, AM Hopkins, MJ Jarvis, HM Johnston, LS Kelvin, J Liske, J Loveday, P Norberg, MB Pracy, O Steele, D Thomas, L Wang


The SCUBA-2 Cosmology Legacy Survey: 850 mu m maps, catalogues and number counts

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 465 (2017) 1789-1806

JE Geach, JS Dunlop, M Halpern, I Smail, P van der Werf, DM Alexander, O Almaini, I Aretxaga, V Arumugam, V Asboth, M Banerji, J Beanlands, PN Best, AW Blain, M Birkinshaw, EL Chapin, SC Chapman, C-C Chen, A Chrysostomou, C Clarke, DL Clements, C Conselice, KEK Coppin, WI Cowley, ALR Danielson, S Eales, AC Edge, D Farrah, A Gibb, CM Harrison, NK Hine, D Hughes, RJ Ivison, M Jarvis, T Jenness, SF Jones, A Karim, M Koprowski, KK Knudsen, CG Lacey, T Mackenzie, G Marsden, K McAlpine, R McMahon, R Meijerink, MJ Michalowski, SJ Oliver, MJ Page, JA Peacock, D Rigopoulou, EI Robson, I Roseboom, K Rotermund, D Scott, S Serjeant, C Simpson, JM Simpson, DJB Smith, M Spaans, F Stanley, JA Stevens, AM Swinbank, T Targett, AP Thomson, E Valiante, DA Wake, TMA Webb, C Willott, JA Zavala, M Zemcov


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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 469 (2017) 3468-3488

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


The third data release of the Kilo-Degree Survey and associated data products

Astronomy and Astrophysics 604 (2017)

JTA De Jong, GA Verdoes Kleijn, T Erben, H Hildebrandt, K Kuijken, G Sikkema, M Brescia, M Bilicki, NR Napolitano, V Amaro, KG Begeman, DR Boxhoorn, H Buddelmeijer, S Cavuoti, F Getman, A Grado, E Helmich, Z Huang, N Irisarri, F La Barbera, G Longo, JP McFarland, R Nakajima, M Paolillo, E Puddu, M Radovich, A Rifatto, C Tortora, EA Valentijn, C Vellucci, WJ Vriend, A Amon, C Blake, A Choi, IF Conti, SDJ Gwyn, R Herbonnet, C Heymans, H Hoekstra, D Klaes, J Merten, L Miller, P Schneider, M Viola

© ESO 2017. Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at the VLT Survey Telescope. It aims to image 1500 square degrees in four filters (ugri). The core science driver is mapping the large-scale matter distribution in the Universe, using weak lensing shear and photometric redshift measurements. Further science cases include galaxy evolution, Milky Way structure, detection of high-redshift clusters, and finding rare sources such as strong lenses and quasars. Aims. Here we present the third public data release and several associated data products, adding further area, homogenized photometric calibration, photometric redshifts and weak lensing shear measurements to the first two releases. Methods. A dedicated pipeline embedded in the Astro-WISE information system is used for the production of the main release. Modifications with respect to earlier releases are described in detail. Photometric redshifts have been derived using both Bayesian template fitting, and machine-learning techniques. For the weak lensing measurements, optimized procedures based on the THELI data reduction and lensfit shear measurement packages are used. Results. In this third data release an additional 292 new survey tiles (≈300 deg 2 ) stacked ugri images are made available, accompanied by weight maps, masks, and source lists. The multi-band catalogue, including homogenized photometry and photometric redshifts, covers the combined DR1, DR2 and DR3 footprint of 440 survey tiles (44 deg 2 ). Limiting magnitudes are typically 24.3, 25.1, 24.9, 23.8 (5σ in a 20″ aperture) in ugri, respectively, and the typical r-band PSF size is less than 0.70″. The photometric homogenization scheme ensures accurate colours and an absolute calibration stable to ≈2% for gri and ≈3% in u. Separately released for the combined area of all KiDS releases to date are a weak lensing shear catalogue and photometric redshifts based on two different machine-learning techniques.


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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 469 (2017) 1883-1896

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

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