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

Yitshak Tuchman*, Raphael Z. Yahel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


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 behaviour. We suggest that some of the properties of the X-ray sources in the globular clusters can be explained with this model.

Original languageAmerican English
Pages (from-to)473-492
Number of pages20
JournalAstrophysics and Space Science
Issue number2
StatePublished - Aug 1977


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