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Search for Gamma-Ray Emission from DES Dwarf Spheroidal Galaxy Candidates with Fermi-LAT Data

Drlica-Wagner
•
A.
•
Albert
altro
& The DES Collaboration
2015
  • journal article

Periodico
THE ASTROPHYSICAL JOURNAL LETTERS
Abstract
Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM. Recently, eight new dSph candidates were discovered using the first year of data from the Dark Energy Survey (DES). We searched for gamma-ray emission coincident with the positions of these new objects in six years of Fermi Large Area Telescope data. We found no significant excesses of gamma-ray emission. Under the assumption that the DES candidates are dSphs with DM halo properties similar to the known dSphs, we computed individual and combined limits on the velocity-averaged DM annihilation cross section for these new targets. If the estimated DM content of these dSph candidates is confirmed, they will constrain the annihilation cross section to lie below the thermal relic cross section for DM particles with masses less than or similar to 20 GeV annihilating via the b (b) over bar or pi(+)pi(-) channels.
DOI
10.1088/2041-8205/809/1/L4
WOS
WOS:000359321900004
Archivio
http://hdl.handle.net/11368/2938426
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84939148773
https://iopscience.iop.org/article/10.1088/2041-8205/809/1/L4/meta
Diritti
closed access
license:copyright editore
FVG url
https://arts.units.it/request-item?handle=11368/2938426
Soggetti
  • dark matter

  • galaxies: dwarf

  • gamma rays: galaxie

  • Local Group

Web of Science© citazioni
128
Data di acquisizione
Mar 5, 2024
Visualizzazioni
2
Data di acquisizione
Jun 8, 2022
Vedi dettagli
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