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Orbital Evolution of Satellite Galaxies in Self-Interacting Dark Matter Models

Jiang, Fangzhou and Kaplinghat, Manoj and Lisanti, Mariangela and Slone, Oren (2021) Orbital Evolution of Satellite Galaxies in Self-Interacting Dark Matter Models. . (Unpublished)

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Dark matter self interactions can leave distinctive signatures on the properties of satellite galaxies around Milky Way--like hosts through their impact on tidal stripping, ram pressure, and gravothermal collapse. We delineate the regions of self-interacting dark matter parameter space---specified by interaction cross section and a velocity scale---where each of these effects dominates, and show how the relative mass loss depends on the satellite's initial mass, density profile and orbit. We obtain novel, conservative constraints in this parameter space using Milky Way satellite galaxies with notably high central densities and small pericenter distances. Our results for self-interacting dark matter models, in combination with constraints from clusters of galaxies, favor velocity-dependent cross sections that lead to gravothermal core collapse in the densest satellites.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Jiang, Fangzhou0000-0001-6115-0633
Kaplinghat, Manoj0000-0001-8555-0164
Lisanti, Mariangela0000-0002-8495-8659
Slone, Oren0000-0002-5999-106X
Additional Information:Attribution 4.0 International (CC BY 4.0) The authors gratefully acknowledge S. Carlsten, J. Greene, E. Nadler, and P. Natarajan for useful conversations. FJ is supported by the Troesh Scholarship at Caltech. MK is supported by the NSF under Award Number 1915005. ML and OS are supported by the DOE under Award Number DE-SC0007968 and the Binational Science Foundation (grant No. 2018140). ML is also supported by the Cottrell Scholar Program through the Research Corporation for Science Advancement.
Funding AgencyGrant Number
Troesh Family Distinguished Scholars fellowshipUNSPECIFIED
Department of Energy (DOE)DE-SC0007968
Binational Science Foundation (USA-Israel)2018140
Cottrell Scholar of Research CorporationUNSPECIFIED
Record Number:CaltechAUTHORS:20211214-190103487
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112430
Deposited By: George Porter
Deposited On:15 Dec 2021 03:07
Last Modified:15 Dec 2021 03:07

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