AGS000022h

• by Peter_Dzwig

  Interesting mass of trailing "debris" here. Or are they just very loose arms. They seem to bent as if they were counterclockwise rotating, but... JT?

  Posted July 22, 2013 12:03 PM

• by mzevin1 scientist, moderator

  I'd say more likely tidal debris than loose arms since we don't see any arms on the other side of the galaxy. Possibly due to interactions with the companion in the field?

  Posted July 22, 2013 9:42 PM

• by JeanTate

  Tidal debris for me too. This is almost a perfect example of the post-Q candidates in that its spectrum is sooo A-like!

  

  Yet it also has nebular lines, so perhaps there's still some star-formation? Or an AGN? If the latter, it must be hidden, because the continuum isn't the least bit blue ... yet the spectroscopic pipeline said "broadline"!

  Anyway, it is, IMHO, so typical of post-Q candidates: bright, point-like nucleus (tiny bulge?), just like an AGN; small galaxy (apart from hints of low surface-brightness tidal debris); white.

  Posted July 23, 2013 3:59 PM

• by Peter_Dzwig

  I am not sure that the other object isn't too far away. Maybe it interacted a long time ago and the filaments are as mzevin1 says just that. Nonetheless why don't they go in the same direction? Angular momentum might suggest that if there was AM transfer at the time of interaction they should go in the same direction. A jet-like structure?

  I agree with JT about the unusual structure. It does look post quench-like, with "added features"

  Question I always have is, what is the scale that we are looking at in these images?

  Posted July 30, 2013 12:13 PM

• by JeanTate

  Here's the object as it appears in DR10:

  

  Using Ned Wright's CosmoCalc, and its default LCDM parameter values, at a z of 0.214, 1" corresponds to 3.45 kpc. So the longest filament/tidal tail is ~5", or ~17 kpc. Which is big; roughly comparable to the effective radii of the first four HUDS I investigated in detail (per my Letter).

  Posted August 1, 2013 7:41 PM