A study of accretion discs around rapidly rotating neutron stars in general relativity and its applications to four Low Mass X-ray Binaries

Abstract

We calculate the accretion disc temperature profiles, disc luminosities and boundary layer luminosities for rapidly rotating neutron stars considering the full effect of general relativity. We compare the theoretical values of these quantities with their values inferred from EXOSAT data for four low mass X-ray binary sources: XB 1820-30, GX 17+2, GX 9+1 and GX 349+2 and constrain the values of several properties of these sources. According to our calculations, the neutron stars in GX 9+1 and GX 349+2 are rapidly rotating and stiffer equations of state are unfavoured.

9 pages, 5 tables, accepted for publication in A&A

References in corpus (4)

• Millisecond Oscillations in X-Ray Binaries
• RXTE Studies of Long-Term X-ray Spectral Variations in 4U 1820-30
• Temperature Profiles of Accretion Disks around Rapidly Rotating Neutron Stars in General Relativity and Implications for Cygnus X-2
• Normal Branch Quasi-Periodic Oscillations in Sco X-1: Viscous Oscillations of a Spherical Shell Near the Neutron Star

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• Fast spinning strange stars: possible ways to constrain interacting quark matter parameters
• Millisecond radio pulsars with known masses: parameter values and equation of state models
• Accretion disks around neutron and strange stars in ${\mathcal{R}}^2$ gravity
• Ways to constrain neutron star equation of state models using relativistic disc lines
• A compact star rotating at 1122 Hz and the r-mode instability
• Timing and spectral study of XB 1254-690 using new RXTE PCA data
• Relativistic disc line: a tool to constrain neutron star equation of state models