V795 Herculis (PG 1711+336) - A new intermediate polar in the period gap

Journal Article · Tue May 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168727· OSTI ID:6711500

Shafter, A W; Robinson, E L; Crampton, D; Warner, B; Prestage, R M ^[1]

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1. Texas Univ., Austin (USA) Dominion Astrophysical Observatory, Victoria (Canada) Cape Town Univ., Rondebosch (South Africa) Dartmouth College, Hanover, NH (USA) Steward Observatory, Tucson, AZ (USA)

New photometric and spectroscopic observations of the nova-like variable V795 Her are reported. A period of 0.1164865(4) days for the light curve variation, and a 0.1082648(3) day period with an amplitude of 70 + or - 20 km/s for the radial velocity variation were established, which leads to the conclusion that the photometric and spectroscopic periods are different. It is argued that V795 Her is an intermediate polar and that one period is the orbital, identified as spectroscopic, and the other is associated with the rotation of the magnetized, accreting white dwarf. It is suggested that the photometric period is the beat period between the orbital period and the rotation period of the white dwarf. The orbital period of V795 Her is near the middle of the gap in the orbital period distribution for cataclysmic variables. Two possibilities for the evolutionary state of V795 Her are examined. 33 refs.

• OSTI ID: 6711500
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 354; 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
DWARF STARS
EMISSION SPECTRA
ERUPTIVE VARIABLE STARS
MOTION
NOVAE
RADIAL VELOCITY
ROTATION
SPECTRA
SPECTROPHOTOMETRY
STAR ACCRETION
STAR EVOLUTION
STARS
VARIABLE STARS
VELOCITY
WHITE DWARF STARS