On Jun 22, 10:03*am, Orval Fairbairn
wrote:
In article
,
*Brad Guth wrote:









On Jun 13, 2:11*pm, Doug Freyburger wrote:
wrote:

RELEASE: 12-182

GIANT BLACK HOLE KICKED OUT OF HOME GALAXY

WASHINGTON -- Astronomers have found strong evidence that a massive
black hole is being ejected from its host galaxy at a speed of
several million miles per hour. New observations from NASA's Chandra
X-ray Observatory suggest that the black hole collided and merged
with another black hole and received a powerful recoil kick from
gravitational wave radiation.

Combining other observations -

Each dwarf galaxy formed around a large black hole. *The vast majority
of current dwarf galaxies still have theirs.

Each large galaxy like our own Milky Way was formed by merging many
dwarf galaxies. *The large black holes at the cores of large galaxies
will have come from merging the black holes as the dwarf galaxies merged.

The three body problem says that if two large bodies collide the third
will be ejected.

So what happened to the dozens of large black holes form all of the
dwarf galaxies that merged to form the Milky Way and so many other large
galaxies? *I say about half of them have been ejected into inter galatic
space and have been there ever since.

A significant fraction of the mass of the universe should be in such
black holes. *I take it estimates of the total observable mass of the
universe includes these as the one observed here was predictable once it
was known that large galaxies happen by merging dwarf ones.

How many black holes are going to go flying off when Andromeda nails
our galaxy?

I don't know, since I do not expect to be around when it happens.

That's true enough, but thousands of generations from now there will
also be few if any humans or all that much other complex forms of life
on Earth. However, since at least half of them BHs have been ejected
and/or about to get set free to trek about the IGM of our universe,
there's a chance that our galaxy could be in for a nasty surprise
that's in addition to all that currently unstable within as is.

Could the JWST detect such rogue/nomad BHs headed our way?