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Masses and Magnetic Fields of White Dwarfs in Cataclysmic Variables

Published online by Cambridge University Press:  12 April 2016

J.P. Lasota ,
J.M. Hameury  and
A.R. King
J.P. Lasota
Affiliation:
DARC, Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal cédex, France
J.M. Hameury
Affiliation:
DAEC, Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal cédex, andUniversité Paris 7, France
A.R. King
Affiliation:
DARC, Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal cédex, France DAEC, Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal cédex, andUniversité Paris 7, France Astronomy Department, University of Leicester, Leicester LE17RH, UK

Extract

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We show that the existence of the AM Her period spike implies (i) a unique white dwarf mass ≃ 0.6 − 0.7M⊙ for most magnetic CV’s (ii) nova explosions remove exactly the accreted mass from magnetic white dwarfs, and (iii) the maximum magnetic field for most CV’s is ≤ 4 × 107 G. The existence of the spike is very strong support for the idea that the period gap results from a drastic reduction of angular momentum losses when the secondary star becomes fully convective.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 114: White Dwarfs , 1989 , pp. 337 - 340
Copyright
Copyright © Springer-Verlag 1989

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