This galaxy is well-known, so I will release the details later. It is very similar to its high-z counterpart in terms of its compactness, embeded disk, high velocity dispersion, stellar age and possibly its extended X-ray profile, except that it is an order of magnitude less massive, which will embarrass calling it an analogue, but won’t make it reside with ultra-compact dwarfs anyway.

There is a bunch of papers which have included it in samples for a variety of purposes, but this is the first time it is put into the context of galaxy growth and the origin of compactness. Hopefully it will provide us some clues about the detailed internal structure and environment of not only itself but also its high-z counterparts.

Advertisement