Why does not dark matter gather and form celestial bodies?












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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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    $begingroup$


    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









    $endgroup$















      3












      3








      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









      $endgroup$




      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






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      asked 1 hour ago









      NimbleDick CrabbNimbleDick Crabb

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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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            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











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              3












              $begingroup$

              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











              $endgroup$
















                3












                3








                3





                $begingroup$

                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











                $endgroup$



                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.







                share|cite|improve this answer














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                share|cite|improve this answer








                edited 18 mins ago









                innisfree

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                answered 23 mins ago









                Anders SandbergAnders Sandberg

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