Constraints on the parameters of radiatively decaying dark matter from the dark matter halo of the Milky Way and Ursa Minor

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dc.creatorBoyarsky, Alexey
dc.creatorNevalainen, Jukka
dc.creatorRuchayskiy, Oleg
dc.date2006-10-31
dc.date2007-05-29
dc.date.accessioned2026-07-07T11:00:05Z
dc.date.available2026-07-07T11:00:05Z
dc.descriptionWe improve the earlier restrictions on parameters of the dark matter (DM) in the form of a sterile neutrino. The results were obtained from non-observing the DM decay line in the X-ray spectrum of the Milky Way (using the recent XMM-Newton PN blank sky data). We also present a similar constraint coming from the recent XMM-Newton observation of Ursa Minor -- dark, X-ray quiet dwarf spheroidal galaxy. The new Milky way data improve on (by as much as the order of magnitude at masses ~3.5 keV) existing constraints. Although the observation of Ursa Minor has relatively poor statistics, the constraints are comparable to those recently obtained using observations of the Large Magellanic Cloud or M31. This confirms a recent proposal that dwarf satellites of the MW are very interesting candidates for the DM search and dedicated studies should be made to this purpose.
dc.description8 pp. v.2 - Final version to appear in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0610961
dc.identifierhttp://arxiv.org/abs/astro-ph/0610961
dc.identifierAstron.Astrophys.471:51-57,2007
dc.identifierdoi:10.1051/0004-6361:20066774
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187611
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleConstraints on the parameters of radiatively decaying dark matter from the dark matter halo of the Milky Way and Ursa Minor
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