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"Holes" in the Milky Way...it's sure a dangerous universe!

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#1 BillP

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Posted 15 May 2019 - 08:50 PM

https://www.livescie...ark-matter.html

 

"We can't map [the impactor] to any luminous object that we have observed," Bonaca told Live Science. "It's much more massive than a star… Something like a million times the mass of the sun. So there are just no stars of that mass. We can rule that out. And if it were a black hole, it would be a supermassive black hole of the kind we find at the center of our own galaxy."

 


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#2 Barlowbill

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Posted 15 May 2019 - 09:47 PM

I read that and thought we really don't that much



#3 Atascadero

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Posted 15 May 2019 - 10:20 PM

Nothing but "dust in the wind" as the song goes. This is really cool stuff. A dynamic universe is infinitely intriguing.  


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#4 sg6

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Posted 16 May 2019 - 12:56 AM

Wonder why it cannot be a supermassive black hole?

If the milky way had captured a dwarf galaxy, and there is reasonable evidence of that occuring a few times  then if that had had a central black hole then that could be "drifting" around and possibly will spiral inwards towards our central black hole. That would wake it up if it is and if they merge.

 

Eventually the Magnellanic clouds will get dragged in - do either of them have a black hole?



#5 BillP

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Posted 16 May 2019 - 08:05 PM

Wonder why it cannot be a supermassive black hole?

 

I believe they ruled that out because no evidence seen.  Lingering evidence would be a host of stars along the black hole's path that were flung out of their orbits in the Galaxy and traveling at much higher rates of speed.  So the many stars that would have been effected by that would have high proper motions that would trace back to the empty space in the galaxy region.


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#6 ewave

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Posted 16 May 2019 - 09:25 PM

I believe they ruled that out because no evidence seen.  Lingering evidence would be a host of stars along the black hole's path that were flung out of their orbits in the Galaxy and traveling at much higher rates of speed.  So the many stars that would have been effected by that would have high proper motions that would trace back to the empty space in the galaxy region.

And also the fact that a black hole would likely have an accretion disk emitting quite a bit of x-rays. 

 

I simply wonder if there is a bunch of dark matter out there, like a tremendous bunch of rocks. 

Even then if there was enough cold dark matter in a given area, it too would create enough gravity at some point in time to clump together.




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