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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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Autori principali: Abdollahi, Soheila (Autore) , Hinton, James Anthony (Autore) , Ghafourizadeh, Zahra (Autore) , Härer, Lucia (Autore) , Hofmann, Werner (Autore) , Jankowsky, Felix (Autore) , Marx, Ramin (Autore) , Montanari, Alessandro (Autore) , Quirrenbach, Andreas (Autore) , Rieger, Frank M. (Autore) , Wagner, Stefan (Autore) , Zacharias, Michael (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: March 11, 2026
In: Journal of cosmology and astroparticle physics
Year: 2026, Fascicolo: 03, Pages: 1-40
ISSN:1475-7516
DOI:10.1088/1475-7516/2026/03/035
Accesso online:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1475-7516/2026/03/035
Testo
Note sull'autore:the Fermi-LAT collaboration, the HAWC collaboration, the H.E.S.S. collaboration, the MAGIC collaboration and the VERITAS collaboration*
Descrizione
Riassunto: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.
Descrizione del documento: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
Descrizione fisica:Online Resource
ISSN:1475-7516
DOI:10.1088/1475-7516/2026/03/035

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