Sonic-Point Model for High-Frequency QPOs in Neutron Star Low-Mass X-Ray Binaries
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Quasi-periodic brightness oscillations (QPOs) with frequencies in the range 300-1200 Hz have been detected from at least nine neutron star low-mass X-ray binaries. Here we summarize the sonic-point model for these brightness oscillations, which we present in detail elsewhere. If the sonic-point interpretation of kilohertz QPOs is confirmed, measurements of kilohertz QPO frequencies in low-mass X-ray binaries will provide new bounds on the masses and radii of neutron stars in these systems and new constraints on the equation of state of matter at high densities.
3 pages LaTeX using sprocl.sty (available from ftp://ftp-astro-theory.fnal.gov/pub/Personal/texas/sprocl.sty), to appear in Proceedings of the 18th Texas Symposium on Relativistic Astrophysics (eds Olinto, Frieman and Schramm, World Scientific)
3 pages LaTeX using sprocl.sty (available from ftp://ftp-astro-theory.fnal.gov/pub/Personal/texas/sprocl.sty), to appear in Proceedings of the 18th Texas Symposium on Relativistic Astrophysics (eds Olinto, Frieman and Schramm, World Scientific)