Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2010-10-11
Phys.Lett.B699:1-4,2011
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
A reference added, a sentence corrected
Scientific paper
10.1016/j.physletb.2011.03.046
We calculate the birefringent in the vacuum for light at the leading and sub-leading orders for the CPT-even part of the SME. We report that all the LIV coefficients absent in the leading order, but the isotropic one, contributes to the sub-leading order birefringent. We consider models free of the first order birefringent. We then show that infrared, optical, and ultraviolet spectropolarimetry of cosmological sources bound the LIV coefficients to less than $ 10^{-16}$. This improves the best current bound on the parity-odd coefficients by two orders of magnitude and establishes the isotropy of the one-way light speed with the precision of $41 \frac{nm}{s}$.
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