Preprint/Report

PUBDB-2019-01142

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Simulations of core formation for frequent dark matter self-interactions

Kummer, J. (Corresponding author)Extern* ; Brüggen, M. ; Dolag, K. ; Kahlhoefer, F. ; Schmidt-Hoberg, K.DESY*

2019

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Please use a persistent id in citations: doi:10.3204/PUBDB-2019-01142

Report No.: DESY-19-020; TTK-19-06; arXiv:1902.02330

Abstract: 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.

Keyword(s): dark matter: halo ; conductivity: thermal ; formation ; hydrodynamics ; scattering ; capture

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
2. NewAve - New avenues towards solving the dark matter puzzle (638528) (638528)
3. DFG project 13245592 - SFB 676: Teilchen, Strings und frühes Universum: Struktur von Materie und Raum-Zeit (13245592) (13245592)
4. EXC 2121 - Das Quantisierte Universum (390833306) (390833306)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2019

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Database coverage:
; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Report/Journal Article Kummer, J. (Corresponding author)DESY* ; Brüggen, M. ; Dolag, K. ; Kahlhoefer, F. ; Schmidt-Hoberg, K.DESY*
Simulations of core formation for frequent dark matter self-interactions
Monthly notices of the Royal Astronomical Society 487(1), 354 - 363 (2019) [10.1093/mnras/stz1261]2019     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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