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No, dark matter will form halos even if it's interactions are solely gravitational. "Clumping" refers to much stronger concentrations from non-gravitational int
by jessriedel 8y ago
No, dark matter will form halos even if it's interactions are solely gravitational. "Clumping" refers to much stronger concentrations from non-gravitational interactions.
- nuccy 8y agoYes, it is correct that clumping can be solely gravitational effect, though so far we have pretty vague idea about the density in those clumps and halos, which are mostly derived from N-body simulation, which are obviously model dependent, e.g. NFW profile [1]. If dark matter interacts with itself one can expect deviations from purely gravitational description due to dark matter analogues of pressure, temperature, viscosity, etc. [1] https://en.wikipedia.org/wiki/Navarro%E2%80%93Frenk%E2%80%93White_profile https://en.wikipedia.org/wiki/Navarro%E2%80%93Frenk%E2%80%93...