Details

Autor(en) / Beteiligte

• Chan, Man Ho
• Brandt, W. Niel

Titel

Observational Constraints of 30–40 GeV Dark Matter Annihilation in Galaxy Clusters

Ist Teil von

• Physics research international, 2016, Vol.2016, p.1-4

Ort / Verlag

New York: Hindawi Publishing Corporation

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Recently, it has been shown that the annihilation of 30–40 GeV dark matter particles through bb- channel can satisfactorily explain the excess GeV gamma-ray spectrum near the Galactic Center. In this paper, we apply the above model to galaxy clusters and use the latest upper limits of gamma-ray flux derived from Fermi-LAT data to obtain an upper bound of the annihilation cross section of dark matter. By considering the extended density profiles and the cosmic ray profile models of 49 galaxy clusters, the upper bound of the annihilation cross section can be further tightened to σv≤9×10-26 cm3 s−1. This result is consistent with the one obtained from the data near the Galactic Center.