Published July 1978
| Version v1
Journal article
RS Gruis: a dwarf cepheid in a binary system
Description
Simultaneous BVRI photometry and photoelectric radial velocities are presented for the dwarf cepheid (AI Vel star) RS Gru. It is shown that the centre of mass velocity varies from cycle to cycle and clearly indicates the presence of a companion. The data are insufficient to determine the orbital period. A modified Wesselink analysis is used to determine a radius of 2.9 solar radii. This is consistent with an immediate post-main sequence state of evolution. The Barnes-Evans method of distance estimation is not applicable because of the presence of the companion. (author)
Additional details
Publishing Information
- Journal Title
- Mon. Not. R. Astron. Soc.
- Journal Volume
- 184
- Journal Issue
- 1
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 1-10
- ISSN
- 0035-8711
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 10428270
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- BINARY STARS; CEPHEIDS; COLOR; DWARF STARS; RADIAL VELOCITY; SPECTROPHOTOMETRY; STAR EVOLUTION; STAR MODELS
- Descriptors DEC
- MATHEMATICAL MODELS; OPTICAL PROPERTIES; ORGANOLEPTIC PROPERTIES; PHYSICAL PROPERTIES; PULSATING VARIABLE STARS; STARS; VARIABLE STARS; VELOCITY