TY  - EJOUR
AU  - Kummer, Janis
AU  - Brüggen, Marcus
AU  - Dolag, Klaus
AU  - Kahlhoefer, Felix
AU  - Schmidt-Hoberg, Kai
TI  - Simulations of core formation for frequent dark matter self-interactions
IS  - arXiv:1902.02330
M1  - PUBDB-2019-01142
M1  - arXiv:1902.02330
M1  - DESY-19-020
M1  - TTK-19-06
PY  - 2019
AB  - We present the first N-body simulations that use smoothed particle hydrodynamics to capture the effect of dark matter self-interactions which are too frequent to be resolved explicitly. The relevant energy transfer equations are derived, the appropriate thermal conductivity is determined and the effects of different smoothing kernels are studied. We apply our framework to simulate the formation of isothermal cores in isolated dark matter haloes and determine the core growth rate as a function of the self-scattering cross section. Our approach may be combined with explicit simulations of rare scatterings in order to simulate accurately the effects of arbitrary dark matter self-interactions in future cosmological simulations.
KW  - dark matter: halo (autogen)
KW  - conductivity: thermal (autogen)
KW  - formation (autogen)
KW  - hydrodynamics (autogen)
KW  - scattering (autogen)
KW  - capture (autogen)
LB  - PUB:(DE-HGF)25 ; PUB:(DE-HGF)29
DO  - DOI:10.3204/PUBDB-2019-01142
UR  - https://bib-pubdb1.desy.de/record/419492
ER  -