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Why does not dark matter gather and form celestial bodies?
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$begingroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
$endgroup$
add a comment |
$begingroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
$endgroup$
add a comment |
$begingroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
$endgroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
312
add a comment |
add a comment |
1 Answer
1
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oldest
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$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 30 mins ago
innisfree
12k33162
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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active
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active
oldest
votes
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 30 mins ago
innisfree
12k33162
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
add a comment |
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 30 mins ago
innisfree
12k33162
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
add a comment |
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 30 mins ago
innisfree
12k33162
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 30 mins ago
innisfree
12k33162
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
edited 30 mins ago
innisfree
12k33162
edited 30 mins ago
innisfree
12k33162
edited 30 mins ago
innisfree
12k33162
12k33162
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
answered 34 mins ago
Anders SandbergAnders Sandberg
10.1k21530
10.1k21530
add a comment |
add a comment |
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