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Redshifting of cosmological black bodies in BSBM varying-alpha theories

dc.creatorBarrow, John David
dc.creatorMagueijo, João
dc.date.accessioned2018-11-24T23:17:58Z
dc.date.available2015-02-17T11:49:59Z
dc.date.available2018-11-24T23:17:58Z
dc.date.issued2014-12-04
dc.identifierhttps://www.repository.cam.ac.uk/handle/1810/246819
dc.identifier.urihttp://repository.aust.edu.ng/xmlui/handle/123456789/3200
dc.description.abstractWe analyse the behaviour of black-body radiation in theories of electromagnetism which allow the electron charge and the fine structure constant to vary in space and time. We show that such theories can be expressed as relativistic generalizations of a conventional dielectric. By making the appropriate definition of the vector potential and associated gauge transformations, we can identify the equivalent of the electric and displacement fields, E and D, as well as the magnetic B and H fields. We study the impact of such dielectrics on the propagation of light in the so-called “BSBM” theory. We examine the form of simple cosmological solutions and conclude that no changes are created to the standard cosmological evolution of the temperature and energy-density of black-body radiation. Nonetheless the matter evolution changes and the behaviour of the entropy per baryon is modified, and the ratios of different dark matter components may be changed too.
dc.languageen
dc.publisherAPS
dc.publisherPHYSICAL REVIEW D
dc.titleRedshifting of cosmological black bodies in BSBM varying-alpha theories
dc.typeArticle


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