Searching for decaying axion-like dark matter from clusters of galaxies

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dc.creatorRiemer-Sorensen, Signe
dc.creatorZioutas, Konstantin
dc.creatorHansen, Steen H.
dc.creatorPedersen, Kristian
dc.creatorDahle, Haakon
dc.creatorLiolios, Anastasios
dc.date2007-03-13
dc.date.accessioned2026-07-07T11:21:19Z
dc.date.available2026-07-07T11:21:19Z
dc.descriptionWe consider the possibility of constraining the lifetime of radiatively decaying dark matter particles in clusters of galaxies inspired from generic axions of the Kaluza-Klein type. Such axions have been invoked as a possible explanation for the coronal X-ray emission from the Sun. These axions, or similar particles, can be produced inside stars and some of them remain confined by the deep gravitational potential of clusters of galaxies. Specifically, we consider regions within merging galaxy clusters (Abell 520 and the "Bullet Cluster"), where gravitational lensing observations have identified massive, but baryon poor, structures. From an analysis of X-ray observations of these mass concentrations, and the expected photon spectrum of decaying solar KK-axions, we derive lower limits to the lifetime of such axions of tau approx. 10^23 sec. However, if KK-axions constitute less than a few percent of the dark matter mass, this lifetime constraint is similar to that derived from solar KK-axions.
dc.descriptionSubmitted to PRL, 4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0703342
dc.identifierhttp://arxiv.org/abs/astro-ph/0703342
dc.identifierPhys.Rev.Lett.99:131301,2007
dc.identifierdoi:10.1103/PhysRevLett.99.131301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194232
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSearching for decaying axion-like dark matter from clusters of galaxies
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