Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231..535h&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, March 15, 1988, p. 535-547.
Astronomy and Astrophysics
Astronomy
83
Binary Stars, Cataclysmic Variables, Magnetic Stars, Stellar Evolution, Mass Flow Rate, Secular Variations, Stellar Mass Accretion, Synchronism, White Dwarf Stars
Scientific paper
The authors study the evolution and the period distribution of cataclysmic variables using a magnetic braking law proposed recently by Mestel & Spruit (1987). The application of this law gives a predicted period distribution that matches the observed one. The authors also show that the observed accumulation of AM Her systems with periods in the range 114 - 115 min can be explained in terms of evolution, as a result of the adiabatic expansion of the secondary when accretion resumes at the end of the period gap provided that the masses of the white dwarfs in AM Her systems are in a restricted range. The authors examine finally the recent claim by Lamb & Melia (1987) that when the magnetic white dwarf synchronizes with the orbit, the system detaches, and enters a prolonged gap. They show that the proposed mechanism does not work, and that synchronization has a relatively small effect on the evolution of these systems.
Hameury Jean-Marie
King Andrew R.
Lasota Jean-Pierre
Ritter Hans
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