Mathematics – Logic
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.1602s&link_type=abstract
American Astronomical Society, HEAD meeting #12, #16.02
Mathematics
Logic
Scientific paper
In the cosmological paradigm, cold dark matter (DM) dominates the mass content of the Universe and is present at every scale. Candidates for DM include many extensions of the standard model, with a weakly interacting massive particle (WIMP) in the mass range from 50 GeV to greater than 10 TeV. The self-annihilation of WIMPs in astrophysical regions of high DM density can produce secondary particles including very high energy (VHE) gamma rays with energies up to the DM particle mass. The VERITAS array of Cherenkov telescopes, designed for the detection of VHE gamma rays in the 100 GeV-10 TeV energy range, is an appropriate instrument for the detection of DM. Among the possible astrophysical targets, dwarf spheroidal galaxies (dSphs) of the Local Group are promising targets to search for the annihilation signature of DM due to their proximity and large DM content. This presentation reports on extensive observations conducted by VERITAS toward the nearby Segue 1 satellite galaxy, which is currently considered to be one of the best dSph for DM studies. The results are discussed in the framework of WIMP models, with a special emphasis on leptophilic DM models invoked to explain the recently reported cosmic ray lepton anomalies. We also report on VERITAS observations of the galactic center as viewed through the lens of neutralino dark matter searches.
Smith Andrew
VERITAS
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