On the stability properties of white dwarf radiative shocks

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Shock Waves, Stellar Mass Accretion, Stellar Oscillations, White Dwarf Stars, Bremsstrahlung, Compton Effect, Stellar Models, X Ray Sources

Scientific paper

The author studies the oscillatory instability of white dwarf radiative accretion shocks. He extends previous works by studying the properties of (1) shocks with power-law cooling functions proportional to ρTα rather than to ρ2Tα; (2) shocks dominated by bremsstrahlung and Compton cooling; and (3) shocks dominated by bremsstrahlung and Compton cooling when the effects of electron thermal conduction are not negligible. The results of the calculations are used to delineate the stability regimes of white dwarf radiative shocks as a function of the dwarf mass, M*, and the accretion rate, M.

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