ARG0001hro - one host (triple), or two? how to describe the radio morphology?

• by JeanTate

  The host is SDSS J091523.30+340136.4, which NED says has a redshift of 2.225:

  

  And most of the radio emission seems to be classic FRII, with a bit of core emission.

  However, there's extended radio emission to the SE ... is that from this host? Or from a different host?

  Posted January 3, 2015 10:08 PM

• by DocR scientist

  Likely in my opinion that it's the same host. A bit unusual, but sometimes there is backflow from the hot spots back to the host galaxy, which then encounters the interstellar medium of the host and gets deflected to the side. That's probably most likely, although it could be some previous episode of jet formation in a different direction (less probable).

  Posted January 6, 2015 11:13 PM

• by akapinska scientist

  and the morphology is FRII 😃

  Posted January 12, 2015 7:06 AM

• by JeanTate

  Thanks DocR, akapinska! 😃

  The 'sideways' lobe (towards SE) is quite large, physically, at z=2.225; my (ratler unreliable) ruler says it's ~14.5", which at z=2.225 is ~120 kpc (I think; could someone please check?).

  Posted January 14, 2015 7:35 AM