Generalized Angular-Velocity Formula and Kinematical Analysis of 3c 279

Álvarez, E. González; Bel, Ll.

doi:10.1086/151878

Cited by 2 publications

(1 citation statement)

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“…A first question is how to interpret the Hubble diagram in VSL theories. Among other matters, the link between luminosity distance and look-back time is obviously modified: with a higher c in the past, objects with the same look-back time are further away [72,[229][230][231]233]. If, however, one takes into account the fine-structure results of section 8.1, one finds that any corrections to the construction of the Hubble diagram must be very small [72], unless very contrived variations in e, G and h are introduced [232].…”

Section: Supernovae Resultsmentioning

confidence: 99%

New varying speed of light theories

2003

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We review recent work on the possibility of a varying speed of light (VSL). We start by discussing the physical meaning of a varying c, dispelling the myth that the constancy of c is a matter of logical consistency. We then summarize the main VSL mechanisms proposed so far: hard breaking of Lorentz invariance; bimetric theories (where the speeds of gravity and light are not the same); locally Lorentz invariant VSL theories; theories exhibiting a color dependent speed of light; varying c induced by extra dimensions (e.g. in the brane-world scenario); and field theories where VSL results from vacuum polarization or CPT violation. We show how VSL scenarios may solve the cosmological problems usually tackled by inflation, and also how they may produce a scale-invariant spectrum of Gaussian fluctuations, capable of explaining the WMAP data. We then review the connection between VSL and theories of quantum gravity, showing how "doubly special" relativity has emerged as a VSL effective model of quantum space-time, with observational implications for ultra high energy cosmic rays and gamma ray bursts. Some recent work on the physics of "black" holes and other compact objects in VSL theories is also described, highlighting phenomena associated with spatial (as opposed to temporal) variations in c. Finally we describe the observational status of the theory. The evidence is currently slim -redshift dependence in the atomic fine structure, anomalies with ultra high energy cosmic rays, and (to a much lesser extent) the acceleration of the universe and the WMAP data. The constraints (e.g. those arising from nucleosynthesis or geological bounds) are tight, but not insurmountable. We conclude with the observational predictions of the theory, and the prospects for its refutation or vindication. j.magueijo@imperial.ac.uk 1 Contents

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