Mass-to-Radius Ratio for the Millisecond Pulsar J0437−4715 | Zendy

George G. Pavlov | Zendy; V. E. Zavlin | Zendy

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

Author(s) -

George G. Pavlov,

V. E. Zavlin

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311007

Subject(s) - millisecond pulsar , physics , pulsar , neutron star , astrophysics , radius , polar , polarization (electrochemistry) , position angle , radiation , astronomy , optics , chemistry , computer security , galaxy , computer science

Properties of X-ray radiation emitted from the polar caps of a radio pulsardepend not only on the cap temperature, size, and position, but also on thesurface chemical composition, magnetic field, and neutron star's mass andradius. Fitting the spectra and the light curves with neutron star atmospheremodels enables one to infer these parameters. As an example, we present hereresults obtained from the analysis of the pulsed X-ray radiation of a nearbymillisecond pulsar J0437-4715. In particular, we show that stringentconstraints on the mass-to-radius ratio can be obtained if orientations of themagnetic and rotation axes are known, e.g., from the radio polarization data.Comment: 2 figures, aasms4.sty; accepted for publication in ApJLetter

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