Relativity and the Galactic-center stars

Details Relativity and the Galactic-center stars Relativity and the Galactic-center stars

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21810804s&link_type=abstract

American Astronomical Society, AAS Meeting #218, #108.04; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Galactic-center stars such as S2 reach speeds of a few percent of light at closest approach to the black hole. Hence relativistic effects are potentially observable. The redshift of a star during pericenter passage is especially sensitive to relativity. The same applies to pulsar timing, if a pulsar in that region is discovered. In this work we explain how the equivalence principle, space curvature and frame dragging in principle reveal themselves through the redshift, and discuss possible strategies for disentangling these from the Newtonian perturbations of other mass in the Galactic-center region.

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