Massive galaxy clusters and the origin of Ultra High Energy Cosmic Rays

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dc.creatorPierpaoli, Elena
dc.creatorFarrar, Glennys
dc.date2005-07-29
dc.date2005-11-22
dc.date.accessioned2026-07-07T06:41:08Z
dc.date.available2026-07-07T06:41:08Z
dc.descriptionWe investigate whether ultra--high energy cosmic rays (UHECR) may be preferentially produced in massive galaxy clusters, by looking for correlations between UHECR directions and those of x-ray clusters. We find an excess-above-random of high energy cosmic rays which correlate with massive galaxy cluster positions. For cosmic rays with energies above 50 EeV the observed correlation is the strongest or angles of 1.2-1.6 degrees where it has a chance probability of about 0.1%. Including lower energy cosmic rays in the sample causes the angle where the most significant correlation is found to increase, as would be expected by virtue of instrumental and magnetic smearing increasing at lower energy. These results suggest that some UHECR are produced in galaxy clusters, or in objects that preferentially populate galaxy clusters.
dc.description5 pages. discussion expanded
dc.identifierhttps://arxiv.org/abs/astro-ph/0507679
dc.identifierhttp://arxiv.org/abs/astro-ph/0507679
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/101565
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMassive galaxy clusters and the origin of Ultra High Energy Cosmic Rays
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