Can proper motions of dark-matter subhalos be detected?

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dc.creatorAndo, Shin'ichiro
dc.creatorKamionkowski, Marc
dc.creatorLee, Samuel K.
dc.creatorKoushiappas, Savvas M.
dc.date2008-09-04
dc.date2008-10-20
dc.date.accessioned2026-07-07T11:45:45Z
dc.date.available2026-07-07T11:45:45Z
dc.descriptionOne of the goals of NASA's Fermi Gamma-ray Space Telescope (formerly GLAST) will be detection of gamma rays from dark-matter annihilation in the Galactic halo. Theoretical arguments suggest that dark matter may be bound into subhalos with masses as small as 10^{-4}--10^2 Earth mass. If so, it may be possible to detect individual subhalos as point sources in the Fermi Telescope. It has further been argued that some of these point sources may exhibit proper motions. Here we show that upper limits to the diffuse gamma-ray background constrain the number of subhalos close enough to exhibit proper motions to be less than one.
dc.description4 pages; accepted for publication in PRD Rapid Communication
dc.identifierhttps://arxiv.org/abs/0809.0886
dc.identifierhttp://arxiv.org/abs/0809.0886
dc.identifierPhys.Rev.D78:101301,2008
dc.identifierdoi:10.1103/PhysRevD.78.101301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201984
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCan proper motions of dark-matter subhalos be detected?
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