TeV gamma-rays from photo-disintegration/de-excitation of cosmic-ray nuclei

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dc.creatorAnchordoqui, Luis A.
dc.creatorBeacom, John F.
dc.creatorGoldberg, Haim
dc.creatorPalomares-Ruiz, Sergio
dc.creatorWeiler, Thomas J.
dc.date2006-11-20
dc.date2007-02-05
dc.date.accessioned2026-07-07T11:20:43Z
dc.date.available2026-07-07T11:20:43Z
dc.descriptionIt is commonly assumed that high-energy gamma-rays are made via either purely electromagnetic processes or the hadronic process of pion production, followed by decay. We investigate astrophysical contexts where a third process (A*) may dominate, namely the photo-disintegration of highly boosted nuclei followed by daughter de-excitation. Starbust regions such as Cygnus OB2 appear to be promising sites for TeV gamma-ray emission via this mechanism. A unique feature of the A* process is a sharp energy minimum ~ 10 TeV/(T/eV) for gamma-ray emission from a thermal region of temperature T. We also check that a diffuse gamma-ray component resulting from the interaction of a possible extreme-energy cosmic-ray nuclei with background radiation is well below the observed EGRET data. The A* mechanism described herein offers an important contribution to gamma-ray astronomy in the era of intense observational activity.
dc.descriptionTo be published in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/astro-ph/0611580
dc.identifierhttp://arxiv.org/abs/astro-ph/0611580
dc.identifierPhys.Rev.Lett.98:121101,2007
dc.identifierdoi:10.1103/PhysRevLett.98.121101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194044
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleTeV gamma-rays from photo-disintegration/de-excitation of cosmic-ray nuclei
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