bright triple with background compact source

• by WizardHowl

  The compact spot of radio emission just below the lobe near the centre of the image is well aligned with a faint IR source and does not seem to fit with the symmetry of the rest of the emission, so I suspect this is a background object not related to the #overedge triple. The contours were joined so I was not able to mark them separately and flagged both the triple's core and the IR source behind the compact radio spot as associated with the radio emission.

  Posted January 9, 2014 10:03 PM

• by ivywong scientist, admin

  Good spotting! I agree with you that we seem to have both a foreground #overedge #triple set against a background #compact. Thanks 😃

  Posted January 9, 2014 10:15 PM

• by JeanTate

  The core of the triple is SDSS J155140.30+103548.6, z_sp = 0.366 (giant) elliptical with prominent emission lines (H-alpha looks significantly broadened -> AGN?). It's apparently the BCG - or center - of a cataloged cluster, WHL J155140.3+103548 (per NED). No NED notes on its radio emission.

  Here's the SDSS field, centered on the core:

  

  Posted January 10, 2014 12:19 AM