Supermassive black hole has unlikely home
The black hole is located in the middle of the spiral galaxy NGC 4178, shown in this Sloan Digital Sky Survey image.
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“Geologist [I'm Climate Change]”
Since: Mar 07
#1 Nov 7, 2012
Results appear to hold to the belief that large black holes result from merger of stars in dense globular clusters and appear to grow from the bottom up.
The result is that the largest globular cluster in the region eventually ends up stuck in the core and gets dumped on by new gas & dust,+ new stars. The fact that this is a largely bulgeless galaxy indicates that it formed only a few globular clusters and then formed a disc.
The globular cluster black holes still appear to be being dumped on and are therefore rather bright. This should be a typical result for a low mass galaxy where orbital velocities are relatively low. Globulars in that system are likely to accrete gas and dust and also tidally funnel stars toward the core of the cluster via low speed field star interactions.
In faster orbital speeds the globular clusters become ram stripped and become old red & dead with a quiescent intermediate mass black hole in the core such as in M15 (Pegasus) in our own galaxy.
Have a nice day: Ag
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