Line Identifications in the Ultraviolet Spectrum of 31 Cygni
Abstract
Line identifications are presented for the Zeta Aur-type eclipsing binary system 31 Cyg (K4 Ib + B4 V). The rich absorption spectrum observed during chromospheric eclipse has been nearly completely identified. This list will be useful in analyzing spectra of related binaries, such as 32 Cyg and VV Cep. The large number of line transitions contributing to many of the observed features indicates that spectrum synthesis methods for determining chromospheric properties will be more useful than curve-of-growth analyses of individual lines. The emission spectrum seen during primary eclipse has also been described and identified.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- March 1989
- DOI:
- 10.1086/191324
- Bibcode:
- 1989ApJS...69..667B
- Keywords:
-
- Chromosphere;
- Cygnus Constellation;
- Eclipsing Binary Stars;
- Line Spectra;
- Ultraviolet Spectra;
- Emission Spectra;
- Stellar Atmospheres;
- Stellar Spectra;
- Supergiant Stars;
- Astrophysics;
- LINE IDENTIFICATIONS;
- STARS: CHROMOSPHERES;
- STARS: ECLIPSING BINARIES;
- STARS: INDIVIDUAL CONSTELLATION NAME: 31 CYGNI;
- ULTRAVIOLET: SPECTRA