X-ray spectra of accreting degenerate stars

Details X-ray spectra of accreting degenerate stars X-ray spectra of accreting degenerate stars

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980nyasa.336..520k&link_type=abstract

In: Texas Symposium on Relativistic Astrophysics, 9th, Munich, West Germany, December 14-19, 1978, Proceedings. (A80-42502 18-90

Astronomy and Astrophysics

Astrophysics

8

Dwarf Stars, Stellar Mass Accretion, Stellar Spectra, X Ray Spectra, X Ray Stars, Bremsstrahlung, Compton Effect, Cyclotron Radiation, Magnetic Stars, Neutron Stars, Ultraviolet Spectra

Scientific paper

X-ray emission from accreting nonmagnetic degenerate dwarfs is discussed. Emphasis is placed on the numerical calculations by Kylafis and Lamb (1979) with regard to the entire range of accretion rates and stellar masses. It is concluded that at moderate and high accretion rates the spectral temperature varies dramatically and the star exhibits a pronounced correlation between X-ray spectral temperature and luminosity. Also considered are the results of Lamb and Masters (1979) of calculations of high-harmonic cyclotron emission from a hot plasma, from which they developed a model of X-ray and UV emission from accreting magnetic degenerate dwarfs. It is found that the position and relative strength of the spectral components change with variations in the accretion rate and differ for different magnetic fields; in addition, magnetic degenerate dwarfs are predicted to be strong UV sources with only a few percent of the total accretion luminosity ordinarily appearing as soft and hard X-rays.

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