Properties of circumstellar matter in GX301-2 observed by TENMA

Astronomy and Astrophysics – Astronomy

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Light Curve, Pulsars, Pulsed Radiation, Satellite Observation, Stellar Envelopes, Iron, Line Spectra, Monte Carlo Method, Neutron Stars, Pulse Amplitude, Pulse Rate, X Ray Scattering, X Ray Spectra

Scientific paper

High resolution spectral observations of the X-ray pulsar GX301-2 by Tenma are analyzed. The X-ray spectrum and the changes that occur as a function of pulse phase GX301-2 has the largest observed column densities of all the X-ray pulsars. The effects caused by scattering in the circumstellar material are modeled in part analytically and in part by Monte Carlo simulations. Scattering effects can account for a significant part of the observed variations in spectrum. The source of radiation from the neutron star must have intrinsic variations. The variations of the spectrum and its implications are discussed.

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