White dwarf masses and nova efficiency in magnetic cataclysmic variables

Astronomy and Astrophysics – Astronomy

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Cataclysmic Variables, Novae, Stellar Magnetic Fields, Stellar Mass Ejection, White Dwarf Stars, Binary Stars, Mass Distribution, Secular Variations, Stellar Evolution

Scientific paper

The period distribution of AM Herculis magnetic cataclysmic binaries is examined. Observed period distributions are compared with evolutionary theory, suggesting that, during nova explosions, most AM Hers and their progenitors only eject the mass accreted between events. Thus, the white dwarf mass remains constant. It is found that the majority of magnetic cataclysmic variable's have white dwarf masses between 0.6 and 0.7 solar masses and form periods of about 4-6 hrs.

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