Thank you very much!Bandersnatch said: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
Dark Matter Gas Theory is a scientific explanation for the behavior of dark matter, a mysterious substance that makes up about 85% of the total mass of the universe. This theory proposes that dark matter exists in a gaseous state and can interact with ordinary matter through weak gravitational forces.
The Bullet Cluster is a collision between two galaxy clusters where the hot gas from the clusters has been separated from the dark matter. According to Dark Matter Gas Theory, this is because dark matter has a different distribution and behaves differently than ordinary matter during these collisions.
One of the main pieces of evidence for dark matter gas is the observation of the Bullet Cluster phenomenon. Additionally, simulations of galaxy formation and gravitational lensing also support the idea of dark matter existing in a gaseous state.
The existence of dark matter gas challenges our previous understanding of the composition of the universe. This theory also has implications for our understanding of galaxy formation and evolution, as well as the overall structure and dynamics of the universe.
Yes, there are alternative theories to explain the behavior of dark matter, such as Modified Newtonian Dynamics (MOND) and WIMP (Weakly Interacting Massive Particles) theory. However, Dark Matter Gas Theory has gained support from recent observations and simulations and is currently one of the leading explanations for the nature of dark matter.