Galactic Black Holes: % & Types Explored

[Omega0]

Hi,
what is the percentage of Galaxies where we expect a central black hole?
What type are those Galaxies?
Thanks!

 

[mfb]

Wikipedia answers this with the first sentence of the article, including two references:

A supermassive black hole (SMBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses (M☉), and is found in the center of almost all massive galaxies.[1][2]

 

[Generator Gawl]

Wikipedia answers this with the first sentence of the article, including two references:

This is the answer I expected. Can't say all galaxies since we have only observed a tiny portion of the universe. What if there was a galaxy out there that didn't have a super massive black hole? Time and more research will tell.

 

[Chronos]

The prevailing opinion is a very high percentage of galaxies harbor an SMBH. See http://brainlagoon.com/2014/04/06/does-every-galaxy-have-a-black-hole-at-the-center/ for f discussion

 

[Generator Gawl]

The prevailing opinion is a very high percentage of galaxies harbor an SMBH. See http://brainlagoon.com/2014/04/06/does-every-galaxy-have-a-black-hole-at-the-center/ for f discussion

Thank you for providing that article, Chronos. I enjoyed the read. Do you believe or have knowledge of the structure of ancient galaxies? I can't imagine there being a black hole, let alone a SMBH at the center of the earliest known galaxies. I'm talking of galaxies a few hundred million years after the universe came into existence.

 

[Chronos]

Direct collapse black holes remain a candidte possibility. Generally this scenario permits SMBH to form very rapidly in the early universe and anchor the formation of galaxies. You may find these papers of interest:http://arxiv.org/abs/0709.0545, Did supermassive black holes form by direct collapse?; http://arxiv.org/abs/1304.1369here http://arxiv.org/abs/1304.1369, Supermassive Black Hole Formation at High Redshifts via Direct Collapse: Physical Processes in the Early Stage; and http://arxiv.org/abs/1403.5267, The First Billion Years project: birthplaces of direct collapse black hole

 

[Omega0]

The prevailing opinion is a very high percentage of galaxies harbor an SMBH. See http://brainlagoon.com/2014/04/06/does-every-galaxy-have-a-black-hole-at-the-center/ for f discussion

Thanks for the link Chronos.

 

[Generator Gawl]

Direct collapse black holes remain a candidte possibility. Generally this scenario permits SMBH to form very rapidly in the early universe and anchor the formation of galaxies. You may find these papers of interest:http://arxiv.org/abs/0709.0545, Did supermassive black holes form by direct collapse?; http://arxiv.org/abs/1304.1369here http://arxiv.org/abs/1304.1369, Supermassive Black Hole Formation at High Redshifts via Direct Collapse: Physical Processes in the Early Stage; and http://arxiv.org/abs/1403.5267, The First Billion Years project: birthplaces of direct collapse black hole

Thank you for responding, Chronos, and thank you for providing these documents. I never thought of a black hole directly collapsing. I'll read these and find out for myself!