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Telescope search for decaying relic axions

Grin, Daniel and Covone, Giovanni and Kneib, Jean-Paul and Kamionkowski, Marc and Blain, Andrew and Jullo, Eric (2007) Telescope search for decaying relic axions. Physical Review D, 75 (10). Art. No. 105018. ISSN 2470-0010.

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A 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 MultiObject 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 a 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.

Item Type:Article
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URLURL TypeDescription
Kneib, Jean-Paul0000-0002-4616-4989
Kamionkowski, Marc0000-0001-7018-2055
Blain, Andrew0000-0001-7489-5167
Jullo, Eric0000-0002-9253-053X
Additional Information:© 2007 The American Physical Society (Received 14 November 2006; revised 27 March 2007; published 25 May 2007) The authors thank Ted Ressell and Matthew Bershady for helpful discussions. D.G. was supported by the Gordon and Betty Moore Foundation. G.C. acknowledges support from the European Community via the Marie Curie European Re-Integration Grant No. 029159. J.-P.K. acknowledges support from the CNRS. M.K. was supported in part by D.O.E. DE-FG03-92-ER40701, NASA NNG05GF69G, and the Gordon and Betty Moore Foundation. A.W.B. thanks the Alfred P. Sloan Foundation and Research Corporation for support.
Group:Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Marie Curie Fellowship029159
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Department of Energy (DOE)DE-FG03-92-ER40701
Alfred P. Sloan FoundationUNSPECIFIED
Research CorporationUNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:GRIprd07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8487
Deposited By: Archive Administrator
Deposited On:15 Aug 2007
Last Modified:04 Dec 2019 22:36

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