Comments on: How To Get Rid Of A Black Hole https://briankoberlein.com/2017/04/05/get-rid-black-hole/ Brian Koberlein Fri, 22 Feb 2019 18:22:15 +0000 hourly 1 https://wordpress.org/?v=5.1 By: Martin Selmke https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5184 Wed, 12 Apr 2017 09:31:46 +0000 https://briankoberlein.com/?p=6579#comment-5184 The mechanism as described does not leave a BH behind, there is only one BH after the merger, which is kiked out. So just a merger with a smaller galaxy should be capable to kick out the BH.
The interaction with Andromeda (which I assumed to be not so tight to lead to a strong interaction of the central BHs so far) would only be an (alternative) explanation for the missing Triangulum BH, when the interaction lead to strong scattering, but no merger. Did you imply this?

]]> By: Ori Vandewalle https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5161 Fri, 07 Apr 2017 18:15:14 +0000 https://briankoberlein.com/?p=6579#comment-5161 Black holes play a large role in the structure and evolution of galaxies, but they are not the gravitational glue of a galaxy the way a star is for a star system. For example, without even considering dark matter, the Milky Way’s supermassive black hole is roughly 4 million solar masses, but the Milky Way itself contains a couple hundred billion stars (most with masses less than a solar mass, but not by enough orders of magnitude to change the balance).

]]> By: Tino https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5157 Thu, 06 Apr 2017 22:18:23 +0000 https://briankoberlein.com/?p=6579#comment-5157 Isn’t the central BH the object which binds a galaxy by it’s gravity, meaning it is it’s central object holding a galaxy together? Why aren’t the stars of the the galaxy ‘following’ the BH? Or differently asked: Can a galaxy be stable with no central BH in it’s center?

]]> By: JIHarmer https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5156 Thu, 06 Apr 2017 20:56:45 +0000 https://briankoberlein.com/?p=6579#comment-5156 If Triangulum ejected it’s SMBH then is it wandering around the local group somewhere ?

]]> By: Brian Koberlein https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5155 Thu, 06 Apr 2017 14:27:52 +0000 https://briankoberlein.com/?p=6579#comment-5155 Possibly. There’s evidence that Triangulum interacted with Andromeda, so that may have ejected its black hole.

]]> By: Ralph Stoever https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5150 Wed, 05 Apr 2017 23:24:41 +0000 https://briankoberlein.com/?p=6579#comment-5150 I was also wondering, if there were 2 BH and they did not merge and only one is leaving, where is the other?

]]> By: Elver S.S. https://briankoberlein.com/2017/04/05/get-rid-black-hole/#comment-5149 Wed, 05 Apr 2017 18:09:42 +0000 https://briankoberlein.com/?p=6579#comment-5149 Dr. Koberlein,

“..such as the Triangulum galaxy, that has no supermassive black hole.”. This gravitational wave process of ejecting a BH leaves the larger one behind. How does this process explain the Triangulum Galaxy lacking a SM BH?

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