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

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

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..50..473t&link_type=abstract

Astrophysics and Space Science, vol. 50, no. 2, Aug. 1977, p. 473-492.

Astronomy and Astrophysics

Astrophysics

10

Neutron Stars, Stellar Luminosity, Stellar Mass Accretion, Stellar Models, Stellar Spectra, X Ray Spectra, Globular Clusters, Monte Carlo Method, Steady Flow, Stellar Envelopes, Stellar Evolution

Scientific paper

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.

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