Possible relation between the X-ray QPO phenomenon and general relativity

Details Possible relation between the X-ray QPO phenomenon and general relativity Possible relation between the X-ray QPO phenomenon and general relativity

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.327..303p&link_type=abstract

Nature (ISSN 0028-0836), vol. 327, May 28, 1987, p. 303, 304. NSF-supported research.

Computer Science

38

Neutron Stars, Relativity, Stellar Oscillations, X Ray Stars, Accretion Disks, Stellar Gravitation, Stellar Mass Accretion

Scientific paper

Many bright X-ray sources were recently found to undergo quasi-periodic oscillations (QPO). Most neutron star models have radii smaller than 3 Schwarzschild radii. Between 69% and 86% of the accretion energy is liberated when matter falls from the marginally stable orbit with a radius rms = 3rSch onto the neutron star surface. The accretion flow through rms is known to be complicated, and a steady-state flow may not be possible when the viscosity parameter α > 0.03. The author suggests that the unsteady flow would make the boundary-layer luminosity variable, possibly giving rise to the X-ray QPO phenomenon.

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