Synchronism and synchronization in compact magnetic binaries.

Details Synchronism and synchronization in compact magnetic binaries. Synchronism and synchronization in compact magnetic binaries.

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991comap..15..177k&link_type=abstract

Comments Astrophys., Vol. 15, No. 4, p. 177 - 188

Astronomy and Astrophysics

Astrophysics

1

Nova Cygni 1975, Cataclysmic Binaries: Magnetic Stars, Cataclysmic Binaries: Orbital Evolution, Cataclysmic Binaries: Synchronization, Am Herculis Stars: Synchronization

Scientific paper

Recent observations have revealed that V1500 Cygni (Nova Cygni 1975) contains a magnetic degenerate dwarf with a spin period 1.8% shorter than its orbital period. The rotation is presently approaching synchronism on a time scale of less than 200 years. Such rapid synchronization is difficult to understand. The author discusses several hypotheses, including magnetic interaction with a magnetized secondary and angular momentum loss to a wind. It will soon be possible to measure the second derivative of the spin period, which will distinguish among the competing explanations. Understanding V1500 Cygni may illuminate the problem of spin-down of accreting neutron stars.

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