RT Journal Article
T1 Spectral and spatial analysis of the dark matter subhalo candidates among Fermi Large Area Telescope unidentified sources
A1 Coronado Blázquez, Javier
A1 Sánchez Conde, Miguel
A1 Di Mauro, Mattia
A1 Aguirre Santaella, Alejandra
A1 Ciuca, Ioana
A1 Domínguez Díaz, Alberto
A1 Kawata, Daisuke
A1 Mirabal, Néstor
AB Fermi-LAT unidentified sources (unIDs) have proven to be compelling targets for performing indirect dark matter (DM) searches. In a previous work, we found that among the 1235 unIDs in Fermi-LAT's catalogs (3FGL, 2FHL and 3FHL) only 44 of those are DM subhalos candidates. We now implement a spectral analysis to test whether these remaining sources are compatible or not with DM origin. This analysis is executed using almost 10 years of Pass 8 Fermi-LAT data. None of the unIDs are found to significantly prefer DM-induced emission compared to other, more conventional, astrophysical sources. In order to discriminate between pulsar and DM sources, we developed a new method which is based on the source's spectral curvature, peak energy, and its detection significance. We also look for spatial extension, which may be a hint for a DM origin according to our N-body simulation studies of the subhalo population. In addition, we used Gaia DR2 data to search for a potential stellar counterpart to our best DM subhalo candidates and, although no firm associations could be found, one of them coincides with the Sagittarius stream. Finally, previous constraints on the DM annihilation cross section are updated with the new number of remaining DM subhalo candidates among unIDs. Our limits now rule out canonical thermal WIMPs up to masses of 10 GeV for b(b) over bar and 20 GeV for tau^(+)tau^(-) annihilation channels, in this way being as sensitive and complementary to those obtained from other targets and probes.
PB IOP Publishing
SN 1475-7516
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/88523
UL https://hdl.handle.net/20.500.14352/88523
LA eng
NO Coronado-Blázquez, Javier, et al. «Spectral and spatial analysis of the dark matter subhalo candidates among Fermi Large Area Telescope unidentified sources». Journal of Cosmology and Astroparticle Physics, vol. 2019, n.o 11, noviembre de 2019, pp. 045-045. https://doi.org/10.1088/1475-7516/2019/11/045.
NO Comunidad de Madrid
NO National Aeronautics and Space Administration
NO UK Resarch and Innovation
NO Ministerio de Ciencia e Innovación (España) 
NO Ministerio de Economía y Competitividad (España)
NO Istituto Nazionale di Astrofisica (Italia)
NO Centre National d’Études Spatiales (France)
DS Docta Complutense
RD 9 abr 2025