Back to Search
Start Over
Interferometric observations of Mira (Omicron Ceti)
- Source :
- Astronomy and Astrophysics. 259(1)
- Publication Year :
- 1992
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1992.
-
Abstract
- The long-period variable Mira Omicron Ceti has been observed at 800 nm wavelength with the Mk III Optical Interferometer at photometric phases 0 = 0.96, 0.05, and 0.14 in 1990; some additional data were taken in 1989. The star is not spherically symmetric, and temporal variations of the size and the position angle of the asymmetry are detected. The visibility data can be represented by two uniform elliptical disks, which could correspond to different layers in Mira's atmosphere. If the size variations are interpreted in terms of physical motion of the emitting material, an infall velocity of about 15 km/s around phi = 0 is derived.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 259
- Issue :
- 1
- Database :
- NASA Technical Reports
- Journal :
- Astronomy and Astrophysics
- Publication Type :
- Report
- Accession number :
- edsnas.19930059212
- Document Type :
- Report