Line identifications in the ultraviolet spectrum of 31 Cygni

Details Line identifications in the ultraviolet spectrum of 31 Cygni Line identifications in the ultraviolet spectrum of 31 Cygni

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apjs...69..667b&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 69, March 1989, p. 667-700.

Astronomy and Astrophysics

Astrophysics

9

Chromosphere, Cygnus Constellation, Eclipsing Binary Stars, Line Spectra, Ultraviolet Spectra, Emission Spectra, Stellar Atmospheres, Stellar Spectra, Supergiant Stars

Scientific paper

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.

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