dc.contributor.author | Kahlhoefer, Felix | |
dc.contributor.author | Kaplinghat, Manoj | |
dc.contributor.author | Slatyer, Tracy Robyn | |
dc.contributor.author | Wu, Chih-Liang | |
dc.date.accessioned | 2020-12-09T14:53:40Z | |
dc.date.available | 2020-12-09T14:53:40Z | |
dc.date.issued | 2019-12 | |
dc.date.submitted | 2019-10 | |
dc.identifier.issn | 1475-7516 | |
dc.identifier.uri | https://hdl.handle.net/1721.1/128751 | |
dc.description.abstract | We present results from N-body simulations of self-interacting dark matter (SIDM) subhalos, which could host ultra-faint dwarf spheroidal galaxies, inside a Milky-Way-like main halo. We find that high-concentration subhalos are driven to gravothermal core collapse, while low-concentration subhalos develop large (kpc-sized) low-density cores, with both effects depending sensitively on the satellite's orbit and the self-interaction cross section over mass σ/m. The overall effect for σ/m ≳ 3 cm2/g is to increase the range of inner densities, potentially explaining the observed diversity of Milky Way satellites, which include compact systems like Draco and Segue 1 that are dense in dark matter, and less dense, diffuse systems like Sextans and Crater II . We discuss possible ways of distinguishing SIDM models from collisionless dark matter models using the inferred dark matter densities and stellar sizes of the dwarf spheroidal galaxies. ©2019 IOP Publishing Ltd and Sissa Medialab. | en_US |
dc.description.sponsorship | Deutsche Forschungsgemeinschaft (DFG) through the Emmy Noether Grant (KA 4662/1-1) | en_US |
dc.description.sponsorship | Office of High Energy Physics. DOE (DE-SC00012567) | en_US |
dc.description.sponsorship | Office of High Energy Physics. DOE (DE-SC001399) | en_US |
dc.description.sponsorship | NSF Grant (PHY-1620638) | en_US |
dc.language.iso | en | |
dc.publisher | IOP Publishing | en_US |
dc.relation.isversionof | https://dx.doi.org/10.1088/1475-7516/2019/12/010 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | en_US |
dc.source | arXiv | en_US |
dc.title | Diversity in density profiles of self-interacting dark matter satellite halos | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Kahlhoefer, Felix et al., "Diversity in density profiles of self-interacting dark matter satellite halos." Journal of Cosmology and Astroparticle Physics 2019, 12 (December 2019): 010 ©2019 Authors | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Center for Theoretical Physics | en_US |
dc.relation.journal | Journal of Cosmology and Astroparticle Physics | en_US |
dc.eprint.version | Original manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/NonPeerReviewed | en_US |
dc.date.updated | 2020-11-09T16:07:44Z | |
dspace.orderedauthors | Kahlhoefer, F; Kaplinghat, M; Slatyer, TR; Wu, C-L | en_US |
dspace.date.submission | 2020-11-09T16:07:47Z | |
mit.journal.volume | 2019 | en_US |
mit.journal.issue | 12 | en_US |
mit.license | OPEN_ACCESS_POLICY | |
mit.metadata.status | Complete | |