14 Jan '21 10:14>3 edits
This is one of those cases in science where the absence of a discovery is the significant scientific discovery!
This is about an observed supper-massive galaxy in a middle of a huge galaxy cluster that, as a result of our current understanding of black holes in galaxies, we would thus expect to have a super-massive black hole in its core and yet, despite a long and exhaustive search for just such a black hole, none was found thus indicating that, mysteriously, this super-massive galaxy has none!
And nobody is sure why! Although there has been some suggestion that millions of years ago something (what?) had somehow (how?) dragged out the back hole out of this galaxy, there are various problems with this suggestion. It is just as if it once had a back hole millions of years ago but then that black hole for some yet unknown reason just suddenly mysteriously vanished!
And, to further deepen this mystery, unlike the core of other galaxies, the core of this galaxy becomes less dense, not more dense, towards its center. And nobody is sure why of that either. It is just as if something blasted most of the mass of the center of its core, including its black hole, clean away from the galaxy to god knows where.
YouTube
I for one would be interesting to find out what will be the truth eventually discovered to solve this mystery and I hope I will live long enough to find out.
This is about an observed supper-massive galaxy in a middle of a huge galaxy cluster that, as a result of our current understanding of black holes in galaxies, we would thus expect to have a super-massive black hole in its core and yet, despite a long and exhaustive search for just such a black hole, none was found thus indicating that, mysteriously, this super-massive galaxy has none!
And nobody is sure why! Although there has been some suggestion that millions of years ago something (what?) had somehow (how?) dragged out the back hole out of this galaxy, there are various problems with this suggestion. It is just as if it once had a back hole millions of years ago but then that black hole for some yet unknown reason just suddenly mysteriously vanished!
And, to further deepen this mystery, unlike the core of other galaxies, the core of this galaxy becomes less dense, not more dense, towards its center. And nobody is sure why of that either. It is just as if something blasted most of the mass of the center of its core, including its black hole, clean away from the galaxy to god knows where.
YouTube
I for one would be interesting to find out what will be the truth eventually discovered to solve this mystery and I hope I will live long enough to find out.