Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data
| Autor: | Song, Deheng, Murase, Kohta, Kheirandish, Ali |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | JCAP 03 (2024) 024 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1475-7516/2024/03/024 |
| Popis: | Galaxy clusters are promising targets for indirect detection of dark matter thanks to the large dark matter content. Using 14 years of Fermi-LAT data from seven nearby galaxy clusters, we obtain constraints on the lifetime of decaying very heavy dark matter particles with masses ranging from $10^3$ GeV to $10^{16}$ GeV. We consider a variety of decaying channels and calculate prompt gamma rays and electrons/positrons from the dark matter. Furthermore, we take into account electromagnetic cascades induced by the primary gamma rays and electrons/positrons, and search for the resulting gamma-ray signals from the directions of the galaxy clusters. We adopt a Navarro-Frenk-White profile of the dark matter halos, and use the profile likelihood method to set lower limits on the dark matter lifetime at a 95% confidence level. Our results are competitive with those obtained through other gamma-ray observations of galaxy clusters and provide complementary constraints to existing indirect searches for decaying very heavy dark matter. Comment: 14 pages, 13 figures, 2 tables. Accepted by JCAP |
| Databáze: | arXiv |
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