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Black hole brings down curtain on jellyfish galaxy's star turn
Posted on 7/2/19 at 6:17 pm
Posted on 7/2/19 at 6:17 pm
phys.org
I find this stuff mesmerizing.
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The role of an excited black hole in the death of an exotic 'jellyfish' galaxy will be presented today (3 July) by Callum Bellhouse of the University of Birmingham at the RAS National Astronomy Meeting in Lancaster. The supermassive black hole at the centre of jellyfish galaxy JO201 is stripping away gas and throwing it out into space, accelerating suppression of star formation and effectively 'killing' the galaxy.
Jellyfish galaxies are spectacular objects that undergo a dramatic process of transformation as they plunge through the dense core of a galaxy cluster at supersonic speeds. External drag forces tear away the galaxy's gas, in a process known as ram-pressure stripping, leaving extended tentacles of trailing material.
The fate of JO201 has been revealed as part of a study of 114 jellyfish galaxies by the GASP (GAs Stripping Phenomena) collaboration, an international team of researchers led by Dr. Bianca Poggianti.
Jellyfish galaxy JO201. Credit: Callum Bellhouse and the GASP collaboration
Much more in the link .
I find this stuff mesmerizing.
________________________________________________________
The role of an excited black hole in the death of an exotic 'jellyfish' galaxy will be presented today (3 July) by Callum Bellhouse of the University of Birmingham at the RAS National Astronomy Meeting in Lancaster. The supermassive black hole at the centre of jellyfish galaxy JO201 is stripping away gas and throwing it out into space, accelerating suppression of star formation and effectively 'killing' the galaxy.
Jellyfish galaxies are spectacular objects that undergo a dramatic process of transformation as they plunge through the dense core of a galaxy cluster at supersonic speeds. External drag forces tear away the galaxy's gas, in a process known as ram-pressure stripping, leaving extended tentacles of trailing material.
The fate of JO201 has been revealed as part of a study of 114 jellyfish galaxies by the GASP (GAs Stripping Phenomena) collaboration, an international team of researchers led by Dr. Bianca Poggianti.
Jellyfish galaxy JO201. Credit: Callum Bellhouse and the GASP collaboration
Much more in the link .
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Posted on 7/2/19 at 7:07 pm to Trumansfangs
Posted on 7/2/19 at 9:49 pm to Trumansfangs
Every discovery about black holes and their effects is fascinating. We knew they could potentially disrupt their galaxies. This is solid evidence that they can.
Posted on 7/3/19 at 8:02 pm to Trumansfangs
quote:
I find this stuff mesmerizing.
I’m with you on that.
Posted on 7/4/19 at 5:10 pm to Trumansfangs
While we are talking black hole, how the heck does the super massive ones come into existence and why does virtually every galaxy have one? Some are billions of times the mass of our sun. Guesses? Obviously there were no stars big enough that it's core could've formed a monster like that.
Posted on 7/4/19 at 5:38 pm to Commander Data
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While we are talking black hole, how the heck does the super massive ones come into existence and why does virtually every galaxy have one? Some are billions of times the mass of our sun. Guesses? Obviously there were no stars big enough that it's core could've formed a monster like that.
I think what causes them, I'm not sure mind you, is that so many stars and so much mass is at the center of galaxies. So I think what you get is one black hole gobbles up a lot of stuff. Then it gobbles up a few black holes. Then it gobbles up even more. Finally you reach the point where you have this voracious monster of a black hole that can't reach anything else to eat.
Or maybe it will. Maybe one day the acceleration of the universe will slow down and the black holes will slowly consume everything else and then one another. Finally you get, at the end of that long process, a Singularity.
Posted on 7/4/19 at 5:57 pm to Trumansfangs
Damn space, you scary
Posted on 7/5/19 at 11:42 am to Commander Data
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why does virtually every galaxy have one?
In a word, gravity. After the Big Bang, matter began to form and accretion took over. It has continued to this time.
Atoms attracted other atoms, molecules to molecules, rocks to rocks all the way up to black holes attracting other black holes (and all objects smaller than them, of course).
It’s the gravitational effect that has shaped our Universe, at least the matter in it. In effect, black holes are the reason we have our particular universe. It would be very different without them.
Posted on 7/5/19 at 2:47 pm to Kentucker
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particular universe
I take it you believe there are others based on those two words. Super string theory? Multiverse?
Posted on 7/5/19 at 3:00 pm to Commander Data
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I take it you believe there are others based on those two words
Thats what I believe. ( Isn't science cool ? )
Posted on 7/5/19 at 3:59 pm to Commander Data
Yes. As we discover more about our incredibly large Universe, we’re seeing that it is likely just one of an uncountable number of related universes, the Multiverse.
Posted on 7/6/19 at 6:48 am to Trumansfangs
Do you believe these universes interact with each other? Also, do you believe each one is governed by the same physical laws?
This post was edited on 7/6/19 at 6:50 am
Posted on 7/6/19 at 5:54 pm to Commander Data
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Do you believe these universes interact with each other?
There is presently no theory about how that could be possible. If all universes are created the same way, then physical laws may originate in a common way. We just don’t know yet.
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Also, do you believe each one is governed by the same physical laws?
The popular answer is no right now. However, we still have an enormous amount of info to collect n our Universe.
One of the biggest questions is, “Why is there far more matter than anti-matter in our observable Universe?” The standard answer is that more matter was created at the Big Bang origin.
However, we don’t know how big our Universe is. My thought is that it’s far bigger than most think. This leaves open the possibility that there are pockets, gigantic pockets for sure, of both matter and anti-matter in the Universe. These areas may exist as opposites of each other and where their boundaries touch, cosmic rays may be generated. An anti-being on an anti-planet may be thinking, "Where is all the matter?
To be sure, this is just a rambling thought by yours truly but it does provide an answer for two questions: Where is the missing anti-matter; and, where do cosmic rays come from?
This post was edited on 7/6/19 at 9:00 pm
Posted on 7/7/19 at 3:30 am to Kentucker
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My thought is that it’s far bigger than most think. This leaves open the possibility that there are pockets, gigantic pockets for sure, of both matter and anti-matter in the Universe. These areas may exist as opposites of each other and where their boundaries touch, cosmic rays may be generated. An anti-being on an anti-planet may be thinking, "Where is all the matter?
I think our universe is much, much bigger than we could comprehend. I have never thought about possible antimatter left out there or the possibility of matter/antimatter annihilation. Good stuff.
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