L - shaped radio emission

• by WizardHowl

  From the radio signal I would have expected the host galaxy to be somewhere near either the lower part of the emission or the narrow bridge-like feature, if a single source were responsible. The only IR candidate seems instead to be associated with the strongest part of the radio emission at its right hand side/lobe. It seems a very unusual geometry - is it possible this might be a wat or bent radio source that just happens to have a bright IR source on a line of sight?

  Posted January 7, 2014 12:48 PM

• by JeanTate in response to WizardHowl's comment.

  The strong IR source is, very likely, a pair of interacting or overlapping ellipticals. Assuming no radio-IR offset, there may be several, unrelated, radio sources: ellipticals in a cluster.

  The brightest radio source may be SDSS J090912.11+483641.4, with a photoz of ~0.34, or SDSS J090911.94+483645.1 (0.38¹):

  

  ¹ the two redshifts have sufficiently large error bars that they could be the same

  Posted January 7, 2014 1:15 PM

• by DocR scientist

  Several of these sharply bent sources are starting to show up (sometimes referred to as dog-leg). These are definitely worth following up on with further radio observations.

  Posted January 7, 2014 5:48 PM