Published October 1990
| Version v1
Journal article
Atmospheric parameters of the white-dwarf companion to HD 74389
Description
An optical slit spectrum of the recently discovered DA white-dwarf companion to the A2 V star HD 74389 is presented. Fits of theoretical spectra to six observed Balmer lines lead to estimates of Tc = 41,000 (+4000, -1000) K and log g = 7.85 (+0.20, -0.06). The latter implies that the white dwarf does not have a substantially higher mass than the mean for field DA white dwarfs. These parameters lead to an estimated M(v) = +9.4, a value not inconsistent with the assumption that the two stars lie at a similar distance from the sun. 10 refs
Additional details
Publishing Information
- Journal Title
- Publications of the Astronomical Society of the Pacific
- Journal Volume
- 102
- Series
- Publ. Astron. Soc. Pac.
- Journal Page Range
- 1126-1130
- ISSN
- 0004-6280
- CODEN
- PASPA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22032957
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- BALMER LINES; BINARY STARS; CHARGE-COUPLED DEVICES; DISTANCE; MASS; STELLAR ATMOSPHERES; VISIBLE SPECTRA; WHITE DWARF STARS
- Descriptors DEC
- ATMOSPHERES; DWARF STARS; SEMICONDUCTOR DEVICES; SPECTRA; STARS