1. MIGHTEE: are giant radio galaxies more common than we thought?
- Author
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Emanuele Daddi, M. Brienza, S. L. Blyth, Cyril Tasse, Z. Randriamanakoto, Oleg Smirnov, Sarah V. White, A. R. Taylor, N. J. Adams, J. Delhaize, I. Delvecchio, Mattia Vaccari, I. H. Whittam, Jordan D. Collier, Isabella Prandoni, Martin J. Hardcastle, S. M. Randriamampandry, Matt J. Jarvis, Yiping Ao, Leah K. Morabito, L. Leeuw, C. L. Hale, Nick Seymour, Ian Heywood, Rebecca A. A. Bowler, Matthew Prescott, Lucia Marchetti, Fang Xia An, Jose Afonso, Kshitij Thorat, Natasha Maddox, Srikrishna Sekhar, Marcin Glowacki, Marcus Brüggen, Delhaize J., Heywood I., Prescott M., Jarvis M.J., Delvecchio I., Whittam I.H., White S.V., Hardcastle M.J., Hale C.L., Afonso J., Ao Y., Brienza M., Bruggen M., Collier J.D., Daddi E., Glowacki M., Maddox N., Morabito L.K., Prandoni I., Randriamanakoto Z., Sekhar S., An F., Adams N.J., Blyth S., Bowler R.A.A., Leeuw L., Marchetti L., Randriamampandry S.M., Thorat K., Seymour N., Smirnov O., Taylor A.R., Tasse C., Vaccari M., Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)
- Subjects
Field (physics) ,Radio galaxy ,galaxies: active ,FOS: Physical sciences ,Astrophysics ,Poisson distribution ,01 natural sciences ,law.invention ,Telescope ,symbols.namesake ,law ,0103 physical sciences ,Surface brightness ,010303 astronomy & astrophysics ,Very large array ,Physics ,radio continuum: galaxies ,Number density ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,Astrophysics of Galaxies (astro-ph.GA) ,symbols - 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 deg^2 region inside the COSMOS field. They have redshifts of z=0.1656 and z=0.3363 and physical sizes of 2.4Mpc and 2.0Mpc, respectively. Only the cores of these GRGs were clearly visible in previous high resolution VLA 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 a 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, 15 pages; 8 figures, accepted for publication in MNRAS on 2020 Dec 9
- Published
- 2021
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