On high mass accretion rates in magnetized column accretion onto white dwarfs

Details On high mass accretion rates in magnetized column accretion onto white dwarfs On high mass accretion rates in magnetized column accretion onto white dwarfs

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...422..289y&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 422, no. 1, p. 289-292

Computer Science

Numerical Analysis

4

Cataclysmic Variables, Novae, Rates (Per Time), Stellar Luminosity, Stellar Mass, White Dwarf Stars, X Ray Astronomy, Bremsstrahlung, Electromagnetic Absorption, Magnetic Fields, Numerical Analysis, Optical Thickness

Scientific paper

We show that high mass accretion rates (dM/dt greater than or equal to 1018 g/s) in an intermediate polar (IP) GK Per are not only compatible with observations but also favored over low mass accretion rates (dM/dt less than 1017 g/s) during outbursts using various theoretical and observational constraints. The column accretion with high mass accretion rates is significantly affected by radiation drag, which modifies the optically thin bremsstrahlung emission for dM/dt greater than or equal to 1018 g/s). For high mass accretion rates, 2-10 keV X-ray luminosity is not a good indicator of mass accretion rate in the X-ray emitting region. The high mass accretion rates deduced from optical-UV luminosities which were previously estimated to be imcompatible with those from X-ray luminosities are shown to be consistent. We discuss other observational constraints which are satisfied with high mass accretion rates. Narrowly constrained mass accretion rates could be used in constructing more sophisticated magnetized accretion models in GK Per and other intermediate polars.

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