19-22 October 2011
Hotel Roanoke, Roanoke VA
US/Eastern timezone
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A Precision Test for an Extra Spatial Dimension Using Black-Hole---Pulsar Binary Systems

22 Oct 2011, 09:30
Crystal Ballroom DE (Hotel Roanoke, Roanoke VA)

Crystal Ballroom DE

Hotel Roanoke, Roanoke VA

Invited ND. Astronomy


John Simonetti (Virginia Tech)


Given the difficulties in testing current frontier physics ideas in earth-based experiments, we might profitably look to the cosmos for observational tests. I will discuss observations that could set a limit on the size of a warped extra spatial dimension in the braneworld scenario. The observations would be similar to those that provided evidence of gravitational radiation by the binary pulsar B1913+16. In the presence of a warped extra spatial dimension a stellar mass black hole will evaporate at a sufficiently high rate to produce an observable orbital effect in a black-hole---pulsar binary system. For some masses and orbital parameters the binary components will outspiral, the opposite of the behavior due to energy loss by gravitational radiation alone. Observations of a black-hole---pulsar system could set considerably better limits on size of the extra dimension in these braneworld models than could be determined by torsion-balance gravity experiments in the foreseeable future.

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