I Dark Matter Gas Theory: Explanation & Bullet Cluster

[DanMP]

Do you know if there is any theory/model where dark matter is considered as a gas? Bullet Cluster suggests that dark matter travels with visible matter and forms halos around galaxies, clusters, etc. It is possible to consider these halos as dark matter atmospheres of massive objects/structures?

 

[Bandersnatch]

If by gas-like you mean a fluid with pressure, as opposed to pressureless cold dark matter (CDM), then you want to look into self-interacting dark matter (SIDM). A detailed review is to be found here:
https://arxiv.org/abs/1705.02358

 

[DanMP]

If by gas-like you mean a fluid with pressure, as opposed to pressureless cold dark matter (CDM), then you want to look into self-interacting dark matter (SIDM). A detailed review is to be found here:
https://arxiv.org/abs/1705.02358

Thank you very much!