A Telescope Search for Decaying Relic Axions

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dc.creatorGrin, Daniel
dc.creatorCovone, Giovanni
dc.creatorKneib, Jean-Paul
dc.creatorKamionkowski, Marc
dc.creatorBlain, Andrew
dc.creatorJullo, Eric
dc.date2006-11-15
dc.date2007-06-29
dc.date.accessioned2026-07-07T10:20:50Z
dc.date.available2026-07-07T10:20:50Z
dc.descriptionA search for optical line emission from the two-photon decay of relic axions was conducted in the galaxy clusters Abell 2667 and 2390, using spectra from the VIMOS (Visible Multi-Object Spectrograph) integral field unit at the Very Large Telescope. New upper limits to the two-photon coupling of the axion are derived, and are at least a factor of 3 more stringent than previous upper limits in this mass window. The improvement follows from larger collecting area, integration time, and spatial resolution, as well as from improvements in signal to noise and sky subtraction made possible by strong-lensing mass models of these clusters. The new limits either require that the two-photon coupling of the axion be extremely weak or that the axion mass window between 4.5 eV and 7.7 eV be closed. Implications for sterile-neutrino dark matter are discussed briefly also.
dc.description14 pages, 10 figures, replaced with version published in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/0611502
dc.identifierhttp://arxiv.org/abs/astro-ph/0611502
dc.identifierPhys.Rev.D75:105018,2007
dc.identifierdoi:10.1103/PhysRevD.75.105018
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174981
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Telescope Search for Decaying Relic Axions
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