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Dark matter constraints from an observation of dSphs and the LMC with the Baikal NT200
- Publication Year :
- 2016
-
Abstract
- In present analysis we complete search for a dark matter signal with the Baikal neutrino telescope NT200 from potential sources in the sky. We use five years of data and look for neutrinos from dark matter annihilations in the dwarfs spheroidal galaxies in the Southern hemisphere and the Large Magellanic Cloud known as the largest and close satellite galaxy of the Milky Way. We do not find any excess in observed data over expected background from the atmospheric neutrinos towards the LMC or any of tested 22 dwarfs. We perform a joint likelihood analysis on the sample of five selected dwarfs and found a concordance of the data with null hypothesis of the background-only observation. We derive 90% CL upper limits on the cross section of annihilating dark matter particles of mass between 30 GeV and 10 TeV into several channels both in our combined analysis of the dwarfs and in a particular analysis towards the LMC.<br />15 pages, 11 figures
- Subjects :
- Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
Annihilation
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena
Dark matter
General Physics and Astronomy
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
Galaxy
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
Neutrino detector
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
Neutrino
Large Magellanic Cloud
Astrophysics - High Energy Astrophysical Phenomena
010303 astronomy & astrophysics
Southern Hemisphere
Astrophysics::Galaxy Astrophysics
Dwarf galaxy
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....a64a8c593492ab4466afe1d41305a243