Light Curves for Rapidly-Rotating Neutron Stars

Details Light Curves for Rapidly-Rotating Neutron Stars Light Curves for Rapidly-Rotating Neutron Stars

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.7207m&link_type=abstract

American Astronomical Society Meeting 208, #72.07

Statistics

Computation

Scientific paper

We present the first raytracing computations for light emitted from the surface of a rapidly rotating neutron star in order to construct light curves for X-ray pulsars and bursters. These calculations are for realistic models of rapidly rotating neutron stars which take into account both the correct exterior metric and the oblate shape of the star. We find that the most important effect arising from rotation comes from the oblate shape of the rotating star. We find that approximating a rotating neutron star as a sphere introduces serious errors in fitted values of the star's radius and mass if the rotation rate is very large. However, in most cases acceptable fits to the ratio of M/R can be obtained with the spherical approximation.

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