Accretion onto neutron star: The X-ray spectra and luminosity

The equations of stationary fluid motion are solved for the case of spherical accretion onto non-magnetic, non-rotating neutron star. The X-ray radiation flux is calculated in two different ways: An approximate solution of the moment equations coupled to the gas fluid equations and numerical Monte-C...

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Bibliographic Details
Published in:Astrophysics and space science 1977-08, Vol.50 (2), p.473-492
Main Authors: Tuchman, Yitshak, Yahel, Raphael Z.
Format: Article
Language:English
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Summary:The equations of stationary fluid motion are solved for the case of spherical accretion onto non-magnetic, non-rotating neutron star. The X-ray radiation flux is calculated in two different ways: An approximate solution of the moment equations coupled to the gas fluid equations and numerical Monte-Carlo simulation of the photon random walk. We show that the spectrum of the X-ray radiation in the outer parts of the inflowing envelope has a characteristic power-law behavior. We suggest that some of the properties of the X-ray sources in the globular clusters can be explained with this model.
ISSN:0004-640X
1572-946X
DOI:10.1007/BF00641751