X-ray spectrum from the accretion columns of magnetic white dwarfs.

Details X-ray spectrum from the accretion columns of magnetic white dwarfs. X-ray spectrum from the accretion columns of magnetic white dwarfs.

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rmxaa..21..437f&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, Vol. 21, p. 437 - 439

Astronomy and Astrophysics

Astronomy

Accretion: White Dwarfs, Accretion: X Rays, Accretion: Am Herculis Stars, Accretion: Radiation Mechanisms

Scientific paper

The authors study a general model of the accretion column of magnetic white dwarfs (e.g. as in AM Herculis binaries) consisting of five regions: (1) a shocked region; (2) a heated preshocked region above region (1); (3) a cool preshocked region above region (2); (4) a surrounding halo; and (5) the surface of the white dwarf. The authors find: (1) the width of the iron peak is ≡0.8 keV and relatively insensitive to the transverse Thomson optical depth; (2) if a halo exists it is very thin or has a very low density; and (3) the transverse Thomson optical depth ≡0.6.

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