Measured redshift invariance of photon velocity
arXiv:1012.0871
Abstract
We report the first direct photon velocity measurements for extragalactic objects. A fiber-optic, photon time-of-flight instrument, optimized for relatively dim sources (), is used to measure the velocity of visible photons emanating from galaxies and quasars. Lightspeed is found to be , and is invariant, within experimental error, over the range of redshifts measured (). This measurement provides additional validation of Einstein's theory of General Relativity (GR) and is consistent with the Friedmann-Lemaître-Robertson-Walker (FLRW) metricl, as well as several alternative cosmological models, notably the hyperbolic anti-de Sitter metric, though not with the pseudo-Euclidean de Sitter metric.
13 pages, 4 figures
References in corpus (16)
- CODATA Recommended Values of the Fundamental Physical Constants: 2010
- Further Evidence for Cosmological Evolution of the Fine Structure Constant
- A Search for Time Variation of the Fine Structure Constant
- Quantum Gravity In De Sitter Space
- Limits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars
- Cosmologies with Varying Light-Speed
- Casimir effect in de Sitter and Anti-de Sitter braneworlds
- Solving the Flatness and Quasi-flatness Problems in Brans-Dicke Cosmologies with a Varying Light Speed
- Most precise single redshift bound to Delta alpha/alpha
- Stars and black holes in varying speed of light theories
- Does a varying speed of light solve the cosmological problems?
- Brane World Cosmologies with Varying Speed of Light
- Charge conservation and time-varying speed of light
- Varying speed of light cosmology from a stringy short distance cutoff
- Variable Speed of Light Cosmology: An Alternative to Inflation
- On the time variation of c, G, and h and the dynamics of the cosmic expansion