This is centered on SDSS J134814.32+152538.1, which has a spectroscopic redshift of 0.057. I'd love to be able to say it - or its northern companion - has been posted before, by ... but I can't! I do not know how to easily go about finding all the relevant DR7, DR8, and DR9 ObjIds (if I had them, I could search this forum), and even if I did, I do not know how to search GZ Talk for any threads, posts, or comments on any AGZ object/field which may include them.
The bottom half of the northern galaxy (SDSS J134814.77+152550.2) is a very different color than the top half; is that because there's a tidal tail of thick dust across it (and none over the top half)? If so, why isn't the bottom galaxy equally red?
And what's SDSS J134814.58+152541.3, the pure red star in between? Is it just a foreground (Milky Way) very red star (M class perhaps)? or something associated with the merger (heavily reddened)? or ...?
Actually, I couldn't resist including another amazing galaxy:
That's SDSS J011821.34-025856.1, and it was noted by trevor allen faller_ErrorDupUsername in GZ Talk on December 7 2012 8:17 PM. On July 7 2014 10:45 PM, zooite mendocinosunrise independently discovered it, saying (in GZ Talk) "what are the two jets coming out of the left side of this galaxy?" Super-zooite Budgieye followed up, and noted its resemblance to M82 (see the Bulge or outflow of gas? GZ Talk thread).
Zooite trevor faller posted this here, in the GZ forum, on December 09, 2012, 01:16:14 am: HALO?
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237657065793650763 dont know if this is a foreground irregular with the flat galaxy showing through or a rather large halo
A few hours' later, paulrogers replied:
Good question! And I'll pose another possibility--perhaps it's the remnant dust cloud from a local supernova's planetary nebula that happens to be in our line of sight.
Unfortunately we have no spectra. If we had separate spectra/redshifts from the eastern blue bit and the southern red bit we could determine if they're the same distance away and associated. NED gives a single redshift (Redshift: 0.026635 +/- 0.000150) but Skyserver has none.
What do you think?
Oh, more eye-candy; M82 (source):