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000419492 0881_ $$aarXiv:1902.02330; DESY-19-020; TTK-19-06
000419492 088__ $$2arXiv$$aarXiv:1902.02330
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000419492 1001_ $$0P:(DE-H253)PIP1019753$$aKummer, Janis$$b0$$eCorresponding author
000419492 245__ $$aSimulations of core formation for frequent dark matter self-interactions
000419492 260__ $$c2019
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000419492 520__ $$aWe 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.
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000419492 536__ $$0G:(EU-Grant)638528$$aNewAve - New avenues towards solving the dark matter puzzle (638528)$$c638528$$fERC-2014-STG$$x1
000419492 536__ $$0G:(GEPRIS)13245592$$aDFG project 13245592 - SFB 676: Teilchen, Strings und frühes Universum: Struktur von Materie und Raum-Zeit (13245592)$$c13245592$$x2
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000419492 650_7 $$2autogen$$aconductivity: thermal
000419492 650_7 $$2autogen$$aformation
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000419492 650_7 $$2autogen$$ascattering
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000419492 7001_ $$aBrüggen, Marcus$$b1
000419492 7001_ $$aDolag, Klaus$$b2
000419492 7001_ $$aKahlhoefer, Felix$$b3
000419492 7001_ $$0P:(DE-H253)PIP1022003$$aSchmidt-Hoberg, Kai$$b4
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