Post-Newtonian Expansion of Gravitational Waves from a Compact Star Orbiting a Rotating Black Hole in Brans-Dicke Theory --- Circular Orbit Case ---

Details Post-Newtonian Expansion of Gravitational Waves from a Compact Star Orbiting a Rotating Black Hole in Brans-Dicke Theory --- Circular Orbit Case --- Post-Newtonian Expansion of Gravitational Waves from a Compact Star Orbiting a Rotating Black Hole in Brans-Dicke Theory --- Circular Orbit Case ---

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pthph..96..713o&link_type=abstract

Progress of Theoretical Physics, Vol. 96, No. 4, pp. 713-728.

Physics

8

Scientific paper

In the context of Brans-Dicke theory, we calculate the post-Newtonian expansion of the scalar part of gravitational radiation from a compact star in a circular orbit around a rotating black hole up to O(v5) beyond the leading, Newtonian-dipole formula. The calculation is based on a method developed recently by Sasaki in the Schwarzschild case in the context of general relativity. The orbit of a compact star is restricted on the equatorial plane. Then we estimate the post-Newtonian effect of scalar radiation to the orbital evolution of coalescing compact binaries. We find that the post-Newtonian effect of scalar radiation is small in the LIGO band if we take into account the experimental bound of the Brans-Dicke parameter ωBD > 500. On the other hand, we find that the post-Newtonian effect of the scalar radiation is not negligible for the LISA experiment.

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