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dc.contributor.authorKeeley, Ryan E.
dc.contributor.authorAbazajian, Kevork N.
dc.contributor.authorKwa, Anna
dc.contributor.authorSafdi, Benjamin R.
dc.contributor.authorRodd, Nicholas Llewellyn
dc.date.accessioned2018-05-11T17:38:09Z
dc.date.available2018-05-11T17:38:09Z
dc.date.issued2018-05
dc.date.submitted2017-10
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.urihttp://hdl.handle.net/1721.1/115332
dc.description.abstractThe Milky Way’s Galactic Center harbors a gamma-ray excess that is a candidate signal of annihilating dark matter. Dwarf galaxies remain predominantly dark in their expected commensurate emission. In this work we quantify the degree of consistency between these two observations through a joint likelihood analysis. In doing so we incorporate Milky Way dark matter halo profile uncertainties, as well as an accounting of diffuse gamma-ray emission uncertainties in dark matter annihilation models for the Galactic Center extended gamma-ray excess (GCE) detected by the Fermi Gamma-Ray Space Telescope. The preferred range of annihilation rates and masses expands when including these unknowns. Even so, using two recent determinations of the Milky Way halo’s local density leaves the GCE preferred region of single-channel dark matter annihilation models to be in strong tension with annihilation searches in combined dwarf galaxy analyses. A third, higher Milky Way density determination, alleviates this tension. Our joint likelihood analysis allows us to quantify this inconsistency. We provide a set of tools for testing dark matter annihilation models’ consistency within this combined data set. As an example, we test a representative inverse Compton sourced self-interacting dark matter model, which is consistent with both the GCE and dwarfs.en_US
dc.description.sponsorshipUnited States. Department of Energy (Contract DESC00012567)en_US
dc.description.sponsorshipUnited States. Department of Energy (Contract DESC0013999)en_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevD.97.103007en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Physical Societyen_US
dc.titleWhat the Milky Way’s dwarfs tell us about the Galactic Center extended gamma-ray excessen_US
dc.typeArticleen_US
dc.identifier.citationKeeley, Ryan E. et al. "What the Milky Way’s dwarfs tell us about the Galactic Center extended gamma-ray excess." Physical Review D 97, 10 (May 2018): 103007 © 2018 American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Center for Theoretical Physicsen_US
dc.contributor.mitauthorRodd, Nicholas Llewellyn
dc.relation.journalPhysical Review Den_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2018-05-10T18:00:22Z
dc.language.rfc3066en
dc.rights.holderAmerican Physical Society
dspace.orderedauthorsKeeley, Ryan E.; Abazajian, Kevork N.; Kwa, Anna; Rodd, Nicholas L.; Safdi, Benjamin R.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0003-3472-7606
mit.licensePUBLISHER_POLICYen_US


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