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Why does not dark matter gather and form celestial bodies?

How Does Dark Matter Form Lumps?Why does dark matter form walls and filamentsDoes a black hole have any kind of mass?Is there a binary black hole system in the middle of the galaxy?A Theory of Almost Everything?Density of dark matter along the galaxyQuestions about shape of dark matter orbits in spiral galaxiesDark matter annihilation cross sectionWhy does dark matter form a halo, Unlike normal matter?Why does dark matter form halos?

3

$begingroup$

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

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asked 1 hour ago

NimbleDick CrabbNimbleDick Crabb

312

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3

$begingroup$

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

share|cite|improve this question

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

share|cite|improve this question

asked 1 hour ago

NimbleDick CrabbNimbleDick Crabb

312

$endgroup$

share|cite|improve this question

asked 1 hour ago

NimbleDick CrabbNimbleDick Crabb

312

share|cite|improve this question

asked 1 hour ago

NimbleDick CrabbNimbleDick Crabb

312

asked 1 hour ago

NimbleDick CrabbNimbleDick Crabb

312

asked 1 hour ago

NimbleDick CrabbNimbleDick Crabb

312

1 Answer
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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.

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edited 28 mins ago

innisfree

12k33162

answered 33 mins ago

Anders SandbergAnders Sandberg

10.1k21530

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4

$begingroup$

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.

share|cite|improve this answer

edited 28 mins ago

innisfree

12k33162

answered 33 mins ago

Anders SandbergAnders Sandberg

10.1k21530

$endgroup$

add a comment | 

4

$begingroup$

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.

share|cite|improve this answer

edited 28 mins ago

innisfree

12k33162

answered 33 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.

share|cite|improve this answer

edited 28 mins ago

innisfree

12k33162

answered 33 mins ago

Anders SandbergAnders Sandberg

10.1k21530

$endgroup$

share|cite|improve this answer

edited 28 mins ago

innisfree

12k33162

answered 33 mins ago

Anders SandbergAnders Sandberg

10.1k21530

edited 28 mins ago

innisfree

12k33162

edited 28 mins ago

innisfree

12k33162

answered 33 mins ago

Anders SandbergAnders Sandberg

10.1k21530

answered 33 mins ago

Anders SandbergAnders Sandberg

10.1k21530