Transient X-Ray Sources, Luminosity Gaps, and Neutron Star Densities

Details Transient X-Ray Sources, Luminosity Gaps, and Neutron Star Densities Transient X-Ray Sources, Luminosity Gaps, and Neutron Star Densities

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...457l..31c&link_type=abstract

Astrophysical Journal Letters v.457, p.L31

Astronomy and Astrophysics

Astronomy

33

X-Rays: Stars, Stars: Binaries: Close, Stars: Neutron, Equation Of State

Scientific paper

A simple model of accretion onto magnetized neutron stars predicts a large luminosity change during a transition from magnetospheric accretion to neutron star accretion. It is pointed out that, for this model, the ratio of the minimum neutron star accretion luminosity and maximum magnetospheric accretion luminosity depends on just the neutron star density and rotation period. Hence, the detection of such a luminosity gap would, at least in principle, give direct insight into the mass-radius relationship of neutron stars. Some potential problems that may affect this measurement are also discussed and some observational results are briefly reviewed.

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