V1500 Cygni - A prediction

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/186071· OSTI ID:5226083

Katz, J I ^[1]

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1. Washington University, Saint Louis, MO (USA)

Scmidt and Stockman (1991) have discovered that V1500 Cygni (Nova Cygni 1975) resembles an AM Herculis star, but with the degenerate dwarf rotating 1.8 percent faster than synchronously, and relaxing toward synchronism on a time scale of less than 200 yr. The inferred spin-down torque is unexpectedly large. It is suggested that this torque results from the interaction of the degenerate star's magnetosphere with a radiation-driven wind from the secondary, and a rapid decay of the spin-down torque, which will soon be observable is predicted. Analogous hydrodynamic torques may also phase-lock the synchronous AM Herculis stars. Study of these systems may help understand torques on neutron stars. 9 refs.

• OSTI ID: 5226083
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 374; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR MOMENTUM
ATMOSPHERES
BINARY STARS
DWARF STARS
ERUPTIVE VARIABLE STARS
MAGNETIC STARS
MASS TRANSFER
MOTION
NEUTRON STARS
NOVAE
PARTICLE PROPERTIES
ROTATION
SPIN
STAR ACCRETION
STAR EVOLUTION
STARS
STELLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR MAGNETOSPHERES
STELLAR WINDS
TORQUE
VARIABLE STARS