TY  - JOUR
A1  - Baushev, Anton N.
A1  - Barkov, M. V.
T1  - Why does Einasto profile index n similar to 6 occur so frequently?
T2  - Journal of cosmology and astroparticle physics
N2  - We consider the behavior of spherically symmetric Einasto halos composed of gravitating particles in the Fokker-Planck approximation. This approach allows us to consider the undesirable influence of close encounters in the N-body simulations more adequately than the generally accepted criteria. The Einasto profile with index n approximate to 6 is a stationary solution of the Fokker-Planck equation in the halo center. There are some reasons to believe that the solution is an attractor. Then the Fokker-Planck diffusion tends to transform a density profile to the equilibrium one with the Einasto index n approximate to 6. We suggest this effect as a possible reason why the Einasto index n approximate to 6 occurs so frequently in the interpretation of N-body simulation results. The results obtained cast doubt on generally accepted criteria of N-body simulation convergence.
KW  - dark matter theory
KW  - dwarfs galaxies
KW  - galaxy evolution
KW  - rotation curves of galaxies
Y1  - 2018
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/53437
SN  - 1475-7516
IS  - 3
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -