Biller, S. D. and Buckley, J. and Burdett, A. and Bussons Gordo, J. and Carter-Lewis, D. A. and Fegan, D. J. and Finley, J. and Gaidos, J. A. and Hillas, A. M. and Krennrich, F. and Lamb, R. C. and Lessard, R. and McEnery, J. E. and Mohanty, G. and Quinn, J. and Rodgers, A. J. and Rose, H. J. and Samuelson, F. and Sembroski, G. and Skelton, P. and Weekes, T. C. and Zweerink, J. (1998) New Limits to the Infrared Background: Bounds on Radiative Neutrino Decay and on Contributions of Very Massive Objects to the Dark Matter Problem. Physical Review Letters, 80 (14). pp. 2992-2995. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:BILprl98
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From considering the effect of γ-γ interactions on recently observed TeV gamma-ray spectra, improved limits are set to the density of extragalactic infrared photons which are robust and essentially model independent. The resulting limits are more than an order of magnitude more restrictive than direct observations in the 0.025–0.3 eV regime. These limits are used to improve constraints on radiative neutrino decay in the mass range above 0.05 eV and to rule out very massive objects as providing the dark matter needed to explain galaxy rotation curves. Lower bounds on the maximum distance which TeV gamma rays may probe are also derived.
|Additional Information:||©1998 The American Physical Society. Received 19 September 1997; revised 9 December 1997. This work has been supported in part by PPARC, Forbairt, the U.S. Department of Energy, NASA, and the Smithsonian Institution. See Also: Comment: Georg G. Raffelt, Comment on “New Limits to the Infrared Background: Bounds on Radiative Neutrino Decay and on Contributions of Very Massive Objects to the Dark Matter Problem”, Phys. Rev. Lett. 81, 4020 (1998). Focus Story: Phys. Rev. Focus 1, story 8|
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