Combined dark matter search towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS
Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect dark matter (DM) searches using gamma-ray telescopes because they are thought to have high DM content and a low astrophysical background. The sensitivity of these searches is improved by combining the observations of dSphs made by...
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Langue: | anglais |
| Publié: |
March 11, 2026
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| In: |
Journal of cosmology and astroparticle physics
Year: 2026, Numéro: 03, Pages: 1-40 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2026/03/035 |
| Accès en ligne: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1475-7516/2026/03/035
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| Notes sur l'auteur: | the Fermi-LAT collaboration, the HAWC collaboration, the H.E.S.S. collaboration, the MAGIC collaboration and the VERITAS collaboration* |
| Résumé: | Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect dark matter (DM) searches using gamma-ray telescopes because they are thought to have high DM content and a low astrophysical background. The sensitivity of these searches is improved by combining the observations of dSphs made by different gamma-ray telescopes. We present the results of a combined search by the most sensitive currently operating gamma-ray telescopes, namely: the satellite-borne Fermi-LAT telescope; the ground-based imaging atmospheric Cherenkov telescope arrays H.E.S.S., MAGIC, and VERITAS; and the HAWC water Cherenkov detector. Individual datasets were analyzed using a common statistical approach. Results were subsequently combined via a global joint likelihood analysis. We obtain constraints on the velocity-weighted cross section 〈σv〉 for DM self-annihilation as a function of the DM particle mass. This five-instrument combination allows the derivation of up to 2-3 times more constraining upper limits on 〈σv〉 than the individual results over a wide mass range spanning from 5 GeV to 100 TeV. Depending on the DM content modeling, the 95% confidence level observed limits reach 1.5×10-24 cm3s-1 and 3.2×10-25 cm3s-1, respectively, in the τ + τ - annihilation channel for a DM mass of 2 TeV. |
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| Description: | Veröffentlicht: 11. März 2026 *the Fermi-LAT collaboration, the HAWC collaboration, the H.E.S.S. collaboration, the MAGIC collaboration and the VERITAS collaboration: S. Abdollahi, J. Hinton, S. Ghafourizadeh, L. Haerer, W. Hofmann, F. Jankowsky, R. Marx, A. Montanari, A. Quirrenbach, F. Rieger, S.J. Wagner, M. Zacharias [und 584 weitere Personen] Gesehen am 27.05.2026 |
| Description matérielle: | Online Resource |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2026/03/035 |