The upper field-strength limit in AM Herculis systems

Details The upper field-strength limit in AM Herculis systems The upper field-strength limit in AM Herculis systems

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..845h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, April 1, 1989, p. 845-852.

Astronomy and Astrophysics

Astronomy

20

Binary Stars, Hercules Nova, Stellar Evolution, Stellar Magnetic Fields, White Dwarf Stars, Cataclysmic Variables, Magnetic Moments, Mass Transfer, Stellar Mass

Scientific paper

A relation between the surface field-strengths, B(1), and magnetic moments of AM Herculis systems is proposed, based on the theory that most of these systems have similar white dwarf masses. It is shown that for B(1) greater than B(max) = 4 x 10 to the 7th G, magnetic braking via the white dwarf magnetic field may drive the binary evolution fast enough to cause the effective disappearance of the system. It is suggested that the upper field strength limit in AM Her systems is B(1) greater than or equal to 10 to the 7th G.

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