ATLAS, and Wide-Angle Tail Galaxies in ATLAS

Journal of astrophysics and astronomy

Jim E. J. Lovell³  Enno Middelberg⁵  Rob Sharp¹  Melanie Johnston-Hollitt²  D. J. Saikia3 4⁴  Minnie Y. Mao1 2 3³  Ray P. Norris⁴ 

[1] Australian Astronomical Observatory, Epping, NSW, 1710, Australia.$$;Victoria University of Wellington, Wellington, New Zealand.$$;University of Tasmania, Hobart, 7001, Australia.$$;CSIRO Australian Telescope National Facility, Epping, NSW, 1710, Australia.$$;Ruhr-Universität Bochum, 44801 Bochum, Germany.$$

关键词: Galaxies: clusters: general;    galaxies: active;    galaxies: general;    radio continuum: galaxies;    galaxies: distances and red-shifts.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Using the Australia Telescope Compact Array (ATCA), ATLAS (Australia Telescope Large Area Survey) is imaging two fields totalling 7 square degrees down to 10 𝜇Jy beam-1 at 1.4 GHz. We have found 6 wide-angle tail galaxies (WATs), 4 of which have sufficient data to identify associated galaxy overdensities. The largest WAT, at a red-shift of 0.22, appears to be associated with an overdensity of galaxies that is spread over an unusually large extent of 12Mpc, with a velocity range of 4500 km s-1. Here we present the WATs in ATLAS and discuss the implications of these observations for future large-scale radio surveys such as ASKAP-EMU.

【 授权许可】

Unknown