What Happens When Supermassive Black ...

What Happens When Supermassive Black Holes Merge?

There are 1 comment on the Universe Today story from Oct 2, 2012, titled What Happens When Supermassive Black Holes Merge?. In it, Universe Today reports that:

Frame from a simulation of the merger of two black holes and the resulting emission of gravitational radiation This animation, created with supercomputers at the University of Colorado, Boulder, show for the first time what happens to the magnetized gas clouds that surround supermassive black holes when two of them collide.

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“Geologist [I'm Climate Change]”

Since: Mar 07

formerly Nuneaton

#1 Oct 3, 2012
Impressive.

Appears to explain the origin of the ferocious magnetic field that ultimately becomes the "drag & spin" disc that surrounds an isolated supermassive black hole.

Also in this sim appears to explain the observation that merger remnants tend to have a very low rate of precession while the black holes that grew in situ such as Sgr A* precess in all 3 axes (disco mode).

Sgr A* also appears to have a drag & spin disc indicating that this is a hangover magnetic field from an accretion disc.

The accretion disc appears to be tied to the spin direction of the black hole irrespective of its input direction and therefore a magnetic field related to the black hole's rotation appears to be a permanent feature, and is probably the only obvious manifestation of hawking decay @ the event horizon (most of the products of which will fall back into the event horizon of a supermassive black hole.

Note: Centaurus A and also NGC 1275 appear to contain supermassive black holes grown in situ. Their jet systems appear to be precessing in "disco mode".

M87 and Cygnus A appear to me merger remnants still actively munching at the background stars.

M104 (see avatar pic) also appears to be the result of a merger remnant. The interior thin disc is the "drag & spin" disc sculpted by the black hole's ferocious magnetic field. The outer thick ring is a gravitational sculpting feature caused by an orbital response of gas & dust to the mass of the interior thin disc.

The similarly sized (to M104) Centaurus A galaxy also features a drag & spin disc which is precessing along whith the interior precessing black hole, with the edges not quite catching up & producing collisional spirals and sweeping the gas & dust out of the way of newly formed star clusters. The "disco mode" Jets highlight where the polar regions have previously been pointing. That pulsating quasar is currently very faint as a result of the drag & spin disc getting in the way of the radiation from the core in our direction.

Have a nice day: Ag

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