Published October 1985
| Version v1
Journal article
Ultraviolet spectrum of the companion of Mira (o Ceti) Observational evidence for a disk formed by wind accretion
Creators
- 1. ESA, Villafranca Satellite Tracking Station, Madrid, Spain
- 2. Hamburger Sternwarte, West Germany
Description
Extensive spectroscopic observations with IUE of the companion of Mira (omicron Ceti B) are presented. It is shown that the UV continuum observed with IUE is exclusively due to Mira B at Mira A minimum. The UV continuum appears to vary erratically with a total range of plus or minus 30 percent within days or weeks, similar to what is known from optical observations. With an empirical disk mass of about 5 x 10 to the -13 solar mass and the estimated accretion rate, a time scale of about 5 hours is found for complete replacement of disk material; this is close to the observed time scale for substantialbrightness variations of Mira B. 43 references
Additional details
Publishing Information
- Journal Title
- Astrophys. J.
- Journal Volume
- 297
- Series
- Astrophys. J.
- Journal Page Range
- 275-287
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 17071041
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- EMISSION SPECTRA; LUMINOSITY; MASS TRANSFER; SPECTROPHOTOMETRY; STAR ACCRETION; STELLAR WINDS; ULTRAVIOLET SPECTRA; VARIABLE STARS
- Descriptors DEC
- OPTICAL PROPERTIES; PHYSICAL PROPERTIES; SPECTRA; STAR EVOLUTION; STARS; STELLAR ACTIVITY