ATLAS, and Wide-Angle Tail Galaxies in ATLAS

作者：Mao Minnie Y^*; Sharp Rob; Saikia D J; Norris Ray P; Johnston Hollitt Melanie; Middelberg Enno; Lovell Jim E J

来源：Journal of Astrophysics and Astronomy, 2011, 32(4): 585-588.

DOI：10.1007/s12036-011-9115-3

• Galaxies: clusters: general
• galaxies: active
• galaxies: general
• radio continuum: galaxies
• galaxies: distances and red-shifts

Using the Australia Telescope Compact Array (ATCA), ATLAS (Australia Telescope Large Area Survey) is imaging two fields totalling 7 square degrees down to 10 mu Jy 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 12 Mpc, 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.

• 出版日期2011-12
• 单位CSIRO