ARG00035wv - cluster core has either very extended BCG or a LOT of ICL/IGL!

Centered on z_sp 0.255 SDSS J121922.75+085814.5, the ~diagonal fuzzy yellow glow is real, I think.

enter image description here

The central galaxy may be the BCG (brightest cluster galaxy), and much of the yellow fluff may be its outer environs (but it wouldn't extend so far to the NE). If it is IGL (inter-galactic light, a.k.a. ICL intra-cluster light), it seems awfully bright.

Posted September 23, 2014 1:58 PM

by ChrisMolloy

So with regards to the host are you saying this is more likely to be SDSS J121922.75+085814.5 rather than SDSS J121922.15+085843.3?

Posted September 24, 2014 1:16 PM

by JeanTate in response to ChrisMolloy's comment.

Neither ... my interest here is not about the radio emission.

A radio contour overlay image might help us work out which is the more likely host ... stay tuned! 😃

Posted September 24, 2014 2:12 PM

by JeanTate in response to JeanTate's comment.

A radio contour overlay image might help us work out which is the more likely host ... stay tuned! 😃

Actually, I don't think an overlay will help. 😮 The host is surely not z_sp 0.255 SDSS J121922.75+085814.5, is it?

enter image description here

Boilerplate: SDSS image per http://skyservice.pha.jhu.edu/DR10/ImgCutout/getjpeg.aspx, FIRST (red) contours derived from the FITS file produced using SkyView with Python code described in this RGZ Talk thread. Image center (J2000.0) is the galaxy SDSS J121922.75+085814.5; 'z_sp' its SDSS spectroscopic redshift.

Posted September 26, 2014 1:27 AM

by ChrisMolloy in response to JeanTate's comment.

Thanks for the overlay.

Actually, I don't think an overlay will help. 😮 The host is surely not z_sp 0.255 SDSS J121922.75+085814.5, is it?

I wouldn't have thought so looking at the overlay.

Posted September 26, 2014 6:00 AM

by JeanTate in response to ChrisMolloy's comment.

So, a one-sided jet/lobe?

Hmm ... it doesn't point back to the giant elliptical, not exactly; but might be blown off-course. However, is such observed one-sided emission common? rare? never-seen-before? I must say that I myself have not often marked a WISE source this far away as a possible host (I would look for at least a hint of radio emission 'on the other side'), if ever.

Anyone?

ETA: I started a separate thread on this question, Do detached 'head-tail' radio structures exist?

Posted September 26, 2014 1:41 PM

by JeanTate in response to JeanTate's comment.

ARG00029si contains another possible example; here's the SDSS field centered on z_sp 0.307 SDSS J121431.51+212540.6:

enter image description here