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arXiv 1004.1644hep-phastro-ph.COastro-ph.GA
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费米第一源表中的暗物质暗晕

Dark Matter Subhalos In the Fermi First Source Catalog

Matthew R. Buckley, Dan Hooper

摘要:

银河系的暗物质晕被认为包含大量较小的次晕。这些天体可能含有非常高密度的暗物质,并产生潜在的可观测伽马射线通量。在这篇文章中,我们研究了费米伽马射线太空望远镜最近出版的第一源目录中的伽马射线源,并试图确定该目录是否可能包含一个人口的暗物质subhalos。我们发现,虽然大约20-60的目录的不明来源可能是暗物质subhalos,这样的人口不能清楚地确定为这样在这个时候。从第一源表中的源的性质,我们得到的暗物质的湮灭截面的限制是严格的矮球状星系的最近的观测。

英文摘要:

The Milky Way's dark matter halo is thought to contain large numbers of smaller subhalos. These objects can contain very high densities of dark matter, and produce potentially observable fluxes of gamma rays. In this article, we study the gamma ray sources in the Fermi Gamma Ray Space Telescope's recently published First Source Catalog, and attempt to determine whether this catalog might contain a population of dark matter subhalos. We find that, while approximately 20-60 of the catalog's unidentified sources could plausibly be dark matter subhalos, such a population cannot be clearly identified as such at this time. From the properties of the sources in the First Source Catalog, we derive limits on the dark matter's annihilation cross section that are comparably stringent to those derived from recent observations of dwarf spheroidal galaxies.

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