Constraints On The Size Of Extra Dimensions From The Orbital Evolution Of Black-Hole X-Ray Binaries

Details Constraints On The Size Of Extra Dimensions From The Orbital Evolution Of Black-Hole X-Ray Binaries Constraints On The Size Of Extra Dimensions From The Orbital Evolution Of Black-Hole X-Ray Binaries

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.0109j&link_type=abstract

American Astronomical Society, HEAD meeting #10, #1.09

Physics

Scientific paper

One of the plausible unification schemes in physics considers the observable universe to be a 4-dimensional surface (the "brane") embedded in higher-dimensional curved spacetime (the "bulk"). In such braneworld gravity models, black holes evaporate in the higher spatial dimensions through the emission of gravitons, resulting in lifetimes of stellar-mass black holes that are significantly smaller than the Hubble time. We show that the predicted evaporation rate leads to an observable change in the orbital period of X-ray binaries harboring black holes. We use the current upper limit of the rate of change of orbital period evolution of the binary A0620-00 to constrain the asymptotic curvature radius of the extra dimension to a value comparable to the one obtained by table-top experiments.

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