Intermediate-mass BH: how to form them?
1
...and how to observe them?
Optical counterparts, lightcurves, accretion disk lines
ß primordial (see eg Rees)
feeding -- from a molecular
cloud? (Grindlay)
-- by capturing a companion?
ß in globular clusters from SN explosion of very massive stars?
(from merging of many smaller BH?)
NO. Ineffective because of slingshot effect
ß in super star clusters ( = young globular clusters?)
from merging of many stars à star of 500 Msun
à sinks to
the cluster centre à SN à IMBH?
(eg, Ebisuzaki et al 2001)