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Primordial black holes and the search for dark matter from the multiverse
Posted on 12/31/20 at 5:02 pm
Posted on 12/31/20 at 5:02 pm
ScienceDaily
The Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) is home to many interdisciplinary projects which benefit from the synergy of a wide range of expertise available at the institute. One such project is the study of black holes that could have formed in the early universe, before stars and galaxies were born.
Such primordial black holes (PBHs) could account for all or part of dark matter, be responsible for some of the observed gravitational waves signals, and seed supermassive black holes found in the center of our Galaxy and other galaxies. They could also play a role in the synthesis of heavy elements when they collide with neutron stars and destroy them, releasing neutron-rich material. In particular, there is an exciting possibility that the mysterious dark matter, which accounts for most of the matter in the universe, is composed of primordial black holes. The 2020 Nobel Prize in physics was awarded to a theorist, Roger Penrose, and two astronomers, Reinhard Genzel and Andrea Ghez, for their discoveries that confirmed the existence of black holes. Since black holes are known to exist in nature, they make a very appealing candidate for dark matter.
The Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) is home to many interdisciplinary projects which benefit from the synergy of a wide range of expertise available at the institute. One such project is the study of black holes that could have formed in the early universe, before stars and galaxies were born.
Such primordial black holes (PBHs) could account for all or part of dark matter, be responsible for some of the observed gravitational waves signals, and seed supermassive black holes found in the center of our Galaxy and other galaxies. They could also play a role in the synthesis of heavy elements when they collide with neutron stars and destroy them, releasing neutron-rich material. In particular, there is an exciting possibility that the mysterious dark matter, which accounts for most of the matter in the universe, is composed of primordial black holes. The 2020 Nobel Prize in physics was awarded to a theorist, Roger Penrose, and two astronomers, Reinhard Genzel and Andrea Ghez, for their discoveries that confirmed the existence of black holes. Since black holes are known to exist in nature, they make a very appealing candidate for dark matter.
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Posted on 12/31/20 at 6:13 pm to Trumansfangs
So, Sheldon was right.
Posted on 12/31/20 at 7:15 pm to Trumansfangs
The hallmark indicators of dark matter are gravitational lensing and the peculiar orbits of stars in galaxies. This is the indirect proof that dark matter exists. Neither of these are discussed in the article.
We also know that black holes exist at the centers of most galaxies. Some of them are supermassive, being billions of times more massive than our sun. The article seems to imply that primordial black holes are very different to these black holes:
This would be a tiny black hole, indeed.
If we juxtapose paragraph one with paragraph two and insert the word “primordial,” isn’t it far more logical to think of the massive blackholes at the centers of galaxies to have been the precursors of those much smaller ones that supposedly float amongst the stars? After all, black holes have one job, absorb all matter and energy that comes near them.
The idea of primordial black holes being the seeds of galaxies made up of baryonic matter is appealing and even logical. However, to think that the Universe is flooded with tiny black holes that somehow avoid doing what black holes do is offputting.
We also know that black holes exist at the centers of most galaxies. Some of them are supermassive, being billions of times more massive than our sun. The article seems to imply that primordial black holes are very different to these black holes:
quote:
The first HSC observations have already reported a very intriguing candidate event consistent with a PBH from the "multiverse," with a black hole mass comparable to the mass of the Moon.
This would be a tiny black hole, indeed.
If we juxtapose paragraph one with paragraph two and insert the word “primordial,” isn’t it far more logical to think of the massive blackholes at the centers of galaxies to have been the precursors of those much smaller ones that supposedly float amongst the stars? After all, black holes have one job, absorb all matter and energy that comes near them.
The idea of primordial black holes being the seeds of galaxies made up of baryonic matter is appealing and even logical. However, to think that the Universe is flooded with tiny black holes that somehow avoid doing what black holes do is offputting.
Posted on 12/31/20 at 8:56 pm to Kentucker
and
quote:
what black holes do
Posted on 1/1/21 at 3:39 pm to Trumansfangs
Black holes and dark matter sounds racist......can someone ask the media?
Posted on 1/4/21 at 9:55 pm to Wtodd
Sometimes it just be like that!
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