- Mapping dark matter in the gamma-ray sky with galaxy catalogs
- Physical Review D. Particles, Fields, Gravitation, and Cosmology
- Volume | Issue number
- 90 | 2
- Article number
- Number of pages
- Document type
- Faculty of Science (FNWI)
- Institute for Theoretical Physics Amsterdam (ITFA)
Cross correlating gamma-ray maps with locations of galaxies in the low-redshift Universe vastly increases sensitivity to signatures of annihilation of dark matter particles. Low-redshift galaxies are ideal targets, as the largest contribution to anisotropy in the gamma-ray sky from annihilation comes from z≲0.1 , where we expect minimal contributions from astrophysical sources such as blazars. Cross correlating the five-year data of Fermi-LAT with the redshift catalog of the 2MASS survey can detect gamma rays from annihilation if dark matter has the canonical annihilation cross section and its mass is smaller than ∼100 GeV .
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- © 2014 American Physical Society
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