Published March 1988
| Version v1
Journal article
BL Eri - an almost-contact binary system
- 1. Tohoku Univ., Sendai (Japan)
- 2. Tokyo Astronomical Observatory (Japan)
- 3. Tokyo Univ. (Japan)
Description
BV photoelectric and spectroscopic observations of the 0.417-day-period eclipsing binary BL Eri were made. Light curves show total eclipses and a considerable photometric disturbance. The light-curve analysis reveals that both components are noncontact but nearly fill their respective critical Roche lobes, and the system is almost contact. The spectral type is determined to be around G0 V. The spectrum appears double lined, giving a spectroscopic mass ratio that is in accord with the photometric mass ratio (q = 0.54). The components are undermassive for their radii and luminosities, indicating a post-main-sequence evolutionary state of the system. 16 references
Additional details
Publishing Information
- Journal Title
- Astron. J.
- Journal Volume
- 95
- Series
- Astron. J.
- Journal Page Range
- 894-899
- ISSN
- 0004-6256
- CODEN
- ANJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19080688
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- BINARY STARS; ECLIPSE; GALLIUM ARSENIDES; LUMINOSITY; MASS; RADIAL VELOCITY; ROCHE EQUIPOTENTIALS; SPECTROSCOPY; STAR EVOLUTION; TELESCOPES
- Descriptors DEC
- ARSENIC COMPOUNDS; ARSENIDES; GALLIUM COMPOUNDS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; POTENTIALS; STARS; VELOCITY