Mass-to-Radius Ratio for the Millisecond Pulsar J0437-4715

Details Mass-to-Radius Ratio for the Millisecond Pulsar J0437-4715 Mass-to-Radius Ratio for the Millisecond Pulsar J0437-4715

1997-09-25

arxiv.org/abs/astro-ph/9709255v1

Astronomy and Astrophysics

Astrophysics

2 figures, aasms4.sty; accepted for publication in ApJLetters

Scientific paper

10.1086/311007

Properties of X-ray radiation emitted from the polar caps of a radio pulsar depend not only on the cap temperature, size, and position, but also on the surface chemical composition, magnetic field, and neutron star's mass and radius. Fitting the spectra and the light curves with neutron star atmosphere models enables one to infer these parameters. As an example, we present here results obtained from the analysis of the pulsed X-ray radiation of a nearby millisecond pulsar J0437-4715. In particular, we show that stringent constraints on the mass-to-radius ratio can be obtained if orientations of the magnetic and rotation axes are known, e.g., from the radio polarization data.

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