Black Hole Constraints on Varying Fundamental Constants

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dc.creatorMacGibbon, Jane H
dc.date2007-06-14
dc.date2007-08-13
dc.date.accessioned2026-07-07T11:16:52Z
dc.date.available2026-07-07T11:16:52Z
dc.descriptionHere we apply the Generalized Second Law of Thermodynamics and derive upper limits on the variation in the fundamental constants. The maximum variation in the electronic charge permitted for black holes accreting and emitting in the present cosmic microwave background corresponds to a variation in the fine structure constant of ((Delta alpha) / alpha) ~ 2 x 10^-23 per second. This value matches the variation measured by Webb et al. using absorption lines in the spectra of distant quasars and suggests the variation mechanism may be a coupling between the electron and the cosmic photon background.
dc.description5 pages, published version
dc.identifierhttps://arxiv.org/abs/0706.2188
dc.identifierhttp://arxiv.org/abs/0706.2188
dc.identifierPhys.Rev.Lett.99:061301,2007
dc.identifierdoi:10.1103/PhysRevLett.99.061301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192821
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleBlack Hole Constraints on Varying Fundamental Constants
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