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|Title:||Implications of kHz quasi-periodic brightness oscillations in X-ray binaries for neutron star structure|
|Authors:||Thampan, Arun V.|
|Publisher:||Blackwell Publishing for the Royal Astronomical Society|
|Citation:||Monthly Notices of the Royal Astronomical Society, 1999, Vol.302, pL69-L73.|
|Abstract:||Kilohertz quasi-periodic oscillations (QPOs) in low-mass X-ray binaries (LMXBs) may represent the orbital frequencies of the innermost Keplerian orbits around accreting neutron stars. Attempts have recently been made to derive constraints on the mass and the equation of state of the neutron star, by identifying the highest observed QPO frequency with the Keplerian frequency at the marginally stable orbit given by the general theory of relativity. These estimates have either neglected the effect of neutron star rotation or used an approximate treatment of rotation in general relativity. We rederive these constraints using a fully general relativistic formalism including the effect of rapid rotation. We also present constraints corresponding to the case where the innermost stable orbit touches the stellar surface.|
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|Copyright:||(1999) Royal Astronomical Society|
|Appears in Collections:||Research Papers (A&A)|
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