Can galactic dark matter substructure contribute to the cosmic gamma-ray anisotropy?
The annihilation of dark matter (DM) particles in the Milky Way can contribute to the diffuse gamma-ray background (DGRB). Due to the presence of substructures, this emission will appear anisotropic in a predictable way. We generate full-sky maps of the gamma-ray emission in galactic substructures f...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2015
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2014, Volume: 447, Issue: 1, Pages: 939-947 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stu2459 |
| Online Access: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stu2459 Verlag, lizenzpflichtig, Volltext: https://academic.oup.com/mnras/article/447/1/939/990338 
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| Author Notes: | J.U. Lange and M.-C. Chu |
| Summary: | The annihilation of dark matter (DM) particles in the Milky Way can contribute to the diffuse gamma-ray background (DGRB). Due to the presence of substructures, this emission will appear anisotropic in a predictable way. We generate full-sky maps of the gamma-ray emission in galactic substructures from results of the high-resolution Via Lactea II N-body simulation of the Milky Way DM halo. We calculate the anisotropy pattern, taking into account different radial profiles of the DM distribution in substructures, cosmic variance, and the detection threshold, and compare it to the anisotropy in the DGRB observed by the Fermi Large Area Telescope (LAT). |
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| Item Description: | Published: 19 December 2014 Gesehen am 09.06.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stu2459 |