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DARK MATTER SEARCHES IN THE GAMMA-RAY EXTRAGALACTIC BACKGROUND VIA CROSS-CORRELATIONS WITH GALAXY CATALOGS
Cuoco, A; Xia JQ(夏俊卿); Xia, JQ; Regis, M; Branchini, E; Fornengo, N; Viel, M
2015
发表期刊ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷号221期号:2页码:29
摘要We compare the measured angular cross-correlation between the Fermi-Large Area Telescope gamma-ray sky and catalogs of extragalactic objects with the expected signal induced by weakly interacting massive particle (WIMP) dark matter (DM). We include a detailed description of the contribution of astrophysical gamma-ray emitters such as blazars, misaligned active galactic nucleus (AGN), and star-forming galaxies, and perform a global fit to the measured cross-correlation. Five catalogs are considered: Sloan Digital Sky Survey (SDSS)-DR6 quasars, Two Micron All Sky Survey galaxies, NRAO VLA Sky Survey radio galaxies, SDSS-DR8 Luminous Red Galaxies, and the SDSS-DR8 main galaxy sample. To model the cross-correlation signal, we use the halo occupation distribution formalism to estimate the number of galaxies of a given catalog in DM halos and their spatial correlation properties. We discuss uncertainties in the predicted cross-correlation signal arising from the DM clustering and WIMP microscopic properties, which set the DM gamma-ray emission. The use of different catalogs probing objects at different redshifts significantly. reduces, though not completely, the degeneracy among the different.-ray components. We find that the presence of a significant WIMP DM signal is allowed by the data but not significantly preferred by the fit, although this is mainly due to a degeneracy with the misaligned AGN component. With modest substructure boost, the sensitivity of this method excludes thermal annihilation cross sections at 95% level for WIMP masses up to few tens of GeV. Constraining the low-redshift properties of astrophysical populations with future data will further improve the sensitivity to DM.
文章类型Article
关键词cosmology: observations cosmology: theory dark matter gamma-rays: diffuse backgrounds large-scale structure of universe
学科领域Astronomy & Astrophysics
DOI10.1088/0067-0049/221/2/29
收录类别SCI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000366620900007
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被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228861
专题粒子天体物理中心
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Cuoco, A,Xia JQ,Xia, JQ,et al. DARK MATTER SEARCHES IN THE GAMMA-RAY EXTRAGALACTIC BACKGROUND VIA CROSS-CORRELATIONS WITH GALAXY CATALOGS[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2015,221(2):29.
APA Cuoco, A.,夏俊卿.,Xia, JQ.,Regis, M.,Branchini, E.,...&Viel, M.(2015).DARK MATTER SEARCHES IN THE GAMMA-RAY EXTRAGALACTIC BACKGROUND VIA CROSS-CORRELATIONS WITH GALAXY CATALOGS.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,221(2),29.
MLA Cuoco, A,et al."DARK MATTER SEARCHES IN THE GAMMA-RAY EXTRAGALACTIC BACKGROUND VIA CROSS-CORRELATIONS WITH GALAXY CATALOGS".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 221.2(2015):29.
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