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MIGHTEE: are giant radio galaxies more common than we thought?

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 501:3 (2021) 3833-3845

Authors:

J Delhaize, I Heywood, M Prescott, Mj Jarvis, I Delvecchio, Ih Whittam, Sv White, Mj Hardcastle, Cl Hale, J Afonso, Y Ao, M Brienza, M Brueggen, Jd Collier, E Daddi, M Glowacki, N Maddox, Lk Morabito, I Prandoni, Z Randriamanakoto, S Sekhar, Fangxia An, Nj Adams, S Blyth, Raa Bowler, L Leeuw, L Marchetti, Sm Randriamampandry, K Thorat, N Seymour, O Smirnov, Ar Taylor, C Tasse, M Vaccari
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CODEX weak lensing mass catalogue and implications on the mass–richness relation

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 502:1 (2021) 1494-1526

Authors:

K Kiiveri, D Gruen, A Finoguenov, T Erben, L van Waerbeke, E Rykoff, L Miller, S Hagstotz, R Dupke, J Patrick Henry, J-P Kneib, G Gozaliasl, CC Kirkpatrick, N Cibirka, N Clerc, M Costanzi, ES Cypriano, E Rozo, H Shan, P Spinelli, J Valiviita, J Weller
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Tightening weak lensing constraints on the ellipticity of galaxy-scale dark matter haloes

Astronomy & Astrophysics EDP Sciences 646 (2021) a73

Authors:

Tim Schrabback, Henk Hoekstra, Ludovic Van Waerbeke, Edo van Uitert, Christos Georgiou, Marika Asgari, Patrick Côté, Jean-Charles Cuillandre, Thomas Erben, Laura Ferrarese, Stephen DJ Gwyn, Catherine Heymans, Hendrik Hildebrandt, Arun Kannawadi, Konrad Kuijken, Alexie Leauthaud, Martin Makler, Simona Mei, Lance Miller, Anand Raichoor, Peter Schneider, Angus Wright
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CODEX Weak Lensing Mass Catalogue and implications on the mass-richness relation

ArXiv 2101.02257 (2021)

Authors:

K Kiiveri, D Gruen, A Finoguenov, T Erben, L van Waerbeke, E Rykoff, L Miller, S Hagstotz, R Dupke, J Patrick Henry, J-P Kneib, G Gozaliasl, CC Kirkpatrick, N Cibirka, N Clerc, M Costanzi, ES Cypriano, E Rozo, H Shan, P Spinelli, J Valiviita, J Weller
Details from ArXiV

MIGHTEE: are giant radio galaxies more common than we thought?

Monthly Notices of the Royal Astronomical Society Oxford University Press 501:3 (2020) 3833-3845

Authors:

J Delhaize, Ian Heywood, M Prescott, Matthew Jarvis, I Delvecchio, Ih Whittam, Sv White, Mj Hardcastle, Cl Hale, J Afonso, Y Ao, M Brienza, M Brüggen, Jd Collier, E Daddi, M Glowacki, N Maddox, Lk Morabito, I Prandoni, Z Randriamanakoto, S Sekhar, F An, Nj Adams, S Blyth, Rebecca Bowler, L Leeuw, L Marchetti, Sm Randriamampandry, K Thorat, N Seymour, O Smirnov, Ar Taylor, C Tasse, M Vaccari

Abstract:

We report the discovery of two new giant radio galaxies (GRGs) using the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) survey. Both GRGs were found within a ∼1 deg2 region inside the COSMOS field. They have redshifts of z = 0.1656 and z = 0.3363 and physical sizes of 2.4 and 2.0 Mpc, respectively. Only the cores of these GRGs were clearly visible in previous high-resolution Very Large Array observations, since the diffuse emission of the lobes was resolved out. However, the excellent sensitivity and uv coverage of the new MeerKAT telescope allowed this diffuse emission to be detected. The GRGs occupy an unpopulated region of radio power – size parameter space. Based on a recent estimate of the GRG number density, the probability of finding two or more GRGs with such large sizes at z < 0.4 in a ∼1 deg2 field is only 2.7 × 10−6, assuming Poisson statistics. This supports the hypothesis that the prevalence of GRGs has been significantly underestimated in the past due to limited sensitivity to low surface brightness emission. The two GRGs presented here may be the first of a new population to be revealed through surveys like MIGHTEE that provide exquisite sensitivity to diffuse, extended emission.
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