A spectroscopic study of the eclipsing cataclysmic binary star PG0818 + 513 - A puzzling novalike variable

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Astronomical Journal; (United States)

DOI:https://doi.org/10.1086/115902· OSTI ID:5184619

Thorstensen, J R; Davis, M K; Ringwald, F A ^[1]

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1. Dartmouth College, Hanover, NH (United States)

Spectroscopic observations of a novalike variable are reported. The emission-line radial velocities yield an orbital period of 0.156 d (= 3.74 hr), in agreement with the eclipse timings of Andronov et al. (1989). The H-alpha emission shows abrupt increases in equivalent width around the eclipse phase; it is not eclipsed as strongly as the continuum. The radial velocities have a pronounced (about 57 deg) phase lag compared to the eclipse. This object may be a somewhat fainter example of a common, but very puzzling, class of luminous novalike variables, which includes SW Sex, DW UMa, V1315 Aql, and PG0027 + 260. 27 refs.

• OSTI ID: 5184619
• Journal Information: Astronomical Journal; (United States), Journal Name: Astronomical Journal; (United States) Vol. 102; ISSN 0004-6256; ISSN ANJOA
• 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
BALMER LINES
BINARY STARS
EMISSION SPECTRA
ERUPTIVE VARIABLE STARS
LUMINOSITY
NOVAE
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIAL VELOCITY
SPECTRA
STAR EVOLUTION
STARS
VARIABLE STARS
VELOCITY