Show simple item record

dc.contributor.authorPeter, Annika H. G.
dc.contributor.authorZavala, Jesús
dc.contributor.authorDooley, Gregory Alan
dc.contributor.authorFrebel, Anna L.
dc.contributor.authorVogelsberger, Mark
dc.date.accessioned2017-04-14T18:58:58Z
dc.date.available2017-04-14T18:58:58Z
dc.date.issued2016-06
dc.date.submitted2016-05
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.urihttp://hdl.handle.net/1721.1/108175
dc.description.abstractWe investigate the effects of self-interacting dark matter (SIDM) on the tidal stripping and evaporation of satellite galaxies in a Milky Way-like host. We use a suite of five zoom-in, dark-matter-only simulations, two with velocity-independent SIDM cross-sections, two with velocity-dependent SIDM cross-sections, and one cold dark matter (CDM) simulation for comparison. After carefully assigning stellar mass to satellites at infall, we find that stars are stripped at a higher rate in SIDM than in CDM. In contrast, the total bound dark matter mass-loss rate is minimally affected, with subhalo evaporation having negligible effects on satellites for viable SIDM models. Centrally located stars in SIDM haloes disperse out to larger radii as cores grow. Consequently, the half-light radius of satellites increases, stars become more vulnerable to tidal stripping, and the stellar mass function is suppressed. We find that the ratio of core radius to tidal radius accurately predicts the relative strength of enhanced SIDM stellar stripping. Velocity-independent SIDM models show a modest increase in the stellar stripping effect with satellite mass, whereas velocity-dependent SIDM models show a large increase in this effect towards lower masses, making observations of ultrafaint dwarfs prime targets for distinguishing between and constraining SIDM models. Due to small cores in the largest satellites of velocity-dependent SIDM, no identifiable imprint is left on the all-sky properties of the stellar halo. While our results focus on SIDM, the main physical mechanism of enhanced tidal stripping of stars apply similarly to satellites with cores formed via other means.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (1122374)en_US
dc.language.isoen_US
dc.publisherOxford University Pressen_US
dc.relation.isversionofhttp://dx.doi.org/10.1093/mnras/stw1309en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titleEnhanced tidal stripping of satellites in the galactic halo from dark matter self-interactionsen_US
dc.typeArticleen_US
dc.identifier.citationDooley, Gregory A.; Peter, Annika H. G.; Vogelsberger, Mark; Zavala, Jesús and Frebel, Anna. “Enhanced Tidal Stripping of Satellites in the Galactic Halo from Dark Matter Self-Interactions.” Monthly Notices of the Royal Astronomical Society 461, no. 1 (June 9, 2016): 710–727.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorDooley, Gregory Alan
dc.contributor.mitauthorFrebel, Anna L.
dc.contributor.mitauthorVogelsberger, Mark
dc.relation.journalMonthly Notices of the Royal Astronomical Societyen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsDooley, Gregory A.; Peter, Annika H. G.; Vogelsberger, Mark; Zavala, Jesús; Frebel, Annaen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0001-6176-9583
dc.identifier.orcidhttps://orcid.org/0000-0002-2139-7145
dc.identifier.orcidhttps://orcid.org/0000-0001-8593-7692
mit.licenseOPEN_ACCESS_POLICYen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record