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J/MNRAS/406/2578           Galaxies near S1189                      (Mao+, 2010)
Wide-angle tail galaxies in ATLAS.
    Mao M.Y., Sharp R., Saikia D.J., Norris R.P., Johnston-Hollitt M.,
    Middelberg E., Lovell J.E.J.
   <Mon. Not. R. Astron. Soc., 406, 2578-2590 (2010)>
   =2010MNRAS.406.2578M
ADC_Keywords: Radio sources ; Clusters, galaxy ; Redshifts ;
              Galaxies, photometry
Keywords: galaxies: active - galaxies: clusters: general -
          galaxies: distances and redshifts - galaxies: general -
          radio continuum: galaxies

Abstract:
    We present radio images of a sample of six wide-angle tail (WAT) radio
    sources, identified in the Australia Telescope Large Area Survey
    1.4-GHz radio survey, and new spectroscopic redshifts for four of
    these sources. These WATs are in the redshift range of 0.1469-0.3762,
    and we find evidence of galaxy overdensities in the vicinity of four
    of the WATs from either spectroscopic or photometric redshifts. We
    also present follow-up spectroscopic observations of the area
    surrounding the largest WAT, S1189, which is at a redshift of ∼0.22.
    The spectroscopic observations, taken using the AAOmega spectrograph
    on the Anglo-Australian Telescope, show an overdensity of galaxies at
    this redshift. The galaxies are spread over an unusually large area of
    ∼12Mpc with a velocity spread of ∼4500km/s. This large-scale structure
    includes a highly asymmetric Fanaroff-Riley type I radio galaxy and
    also appears to host a radio relic. It may represent an unrelaxed
    system with different sub-structures interacting or merging with one
    another. We discuss the implications of these observations for future
    large-scale radio surveys.

Description:
    There appears to be a cluster of galaxies within ∼2-arcmin of S1189 in
    the optical and infrared images. We obtained AAOmega observations for
    sources within a degree of S1189 in a service mode during the night of
    2008 October 18.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        58       42   Optical and infrared properties of the putative
                              cluster members
tablea1.dat       34       94   New redshifts of galaxies near S1189


See also:
    II/290 : SWIRE Photometric Redshift Catalogue (Rowan-Robinson+, 2008)


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1- 26  A26   ---     SWIRE     SWIRE ID (SWIRE[34] JHHMMSS.ss+DDMMSS.s)
  28- 32  F5.2  mag     Rmag      ? SWIRE R magnitude
  34- 39  F6.4  ---     z         Redshift
  41- 45  F5.2  mJy     Flux      ? Radio flux density at 1.4GHz
  47- 58  A12   ---     Com       Comment


Byte-by-byte Description of file: tablea1.dat

   Bytes Format Units   Label     Explanations

   1- 26  A26   ---     SWIRE     SWIRE ID (SWIRE[34] JHHMMSS.ss+DDMMSS.s)
  28- 34  F7.5  ---     z         Redshift


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    07-Mar-2011