ARG00034qr: host is BCG of a very nice, compact, rich group
Indeed very nice, does bh-group stand for black holes in this compact cluster? As usual curious to know!
Hi Leonie, I use bhgroup to refer to more than one host galaxy in a cluster, within an ARG frame/field. It would be more accurate to say that there's more than one FIRST host galaxy, each likely an AGN with radio emission. It's possible, even likely, that others use the hashtag to mean something (a little) different.
The term, as it stands, is a little strange; after all, we expect there are supermassive black holes in the nuclei of all normal galaxies, and in a cluster there are lots and lots of normal galaxies!