Ultraviolet photometry from the Orbiting Astronomical Observatory. XVIII. The 1972 eclipse of 31 Cygni.
Abstract
Wide-band filter photometry of the 1972 eclipse of 31 Cyg has been reduced for seven filters with effective wavelengths A. These ingress observations cover the interval April 21.1-May 10.9. Comparison of the light curves with earlier OAO eclipse observations of the similar system 32 Cyg suggests that both K supergiant atmospheres can be described with a single density profile p/p0 = f(r/r0). Line absorption appears to be the principal source of opacity at all ultraviolet wavelengths. Subject headings: eclipsing binaries - stars, individual - ultraviolet
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1975
- DOI:
- 10.1086/153311
- Bibcode:
- 1975ApJ...195..121D
- Keywords:
-
- Eclipsing Binary Stars;
- Spaceborne Astronomy;
- Stellar Spectrophotometry;
- Ultraviolet Spectra;
- Absorption Spectra;
- Light Curve;
- Oao;
- Satellite Observation;
- Stellar Spectra;
- Ultraviolet Radiation;
- Astronomy