Cosmological vector perturbations in vector-tensor teories of gravitation. CMB anomalies

Details Cosmological vector perturbations in vector-tensor teories of gravitation. CMB anomalies Cosmological vector perturbations in vector-tensor teories of gravitation. CMB anomalies

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1122..121d&link_type=abstract

PHYSICS AND MATHEMATICS OF GRAVITATION: Proceedings of the Spanish Relativity Meeting 2008. AIP Conference Proceedings, Volume

Mathematics

Cosmology, Approximation Methods, Equations Of Motion, Background Radiations

Scientific paper

Five years of CMB (cosmic microwave background) observations with WMAP (Wilkinson Microwave Anisotropy Probe) have pointed out some anomalies in the first CMB temperature multipoles. We have recently proved that large scale cosmological vector modes could explain both the alignments of the second and third multipoles and the planar character of the octopole; nevertheless, these modes decay in standard cosmology. Here, we compare the evolution of cosmological vector perturbations in a certain vector-tensor theory of gravitation with the standard evolution in the framework of General Relativity. The importance of the resulting differences -in order to explain CMB anomalies- is briefly discussed.

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