Duplicity among stars with strong chromospheric Ca II emission lines - a statistical survey

Journal Article · Mon Jun 01 00:00:00 EDT 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165327· OSTI ID:5955139

Young, A; Mielbrecht, R A; Abt, H A

Observations of 38 mainly main-sequence stars with anomalously strong Ca II emission, obtained using coude spectrographs on the 2.1-m and 1-m telescopes at KPNO and the 0.6-m telescope at Lick Observatory, are reported. The data are presented in tables and analyzed; four stars are found to be close-binary candidates. It is concluded that almost all binaries with periods and stellar structures within specified ranges exhibit magnetically induced chromospheric activity, but that other (unknown) mechanisms can produce such activity in single stars as well. 14 references.

• Research Organization: High Altitude Observatory, Boulder, CO; San Joaquin Delta College, Stockton, CA; Kitt Peak National Observatory, Tucson, AZ
• OSTI ID: 5955139
• Journal Information: Astrophys. J.; (United States), Vol. 317
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAIN SEQUENCE STARS
STELLAR ACTIVITY
BINARY STARS
CALCIUM
CHROMOSPHERE
DWARF STARS
EMISSION SPECTRA
STAR EVOLUTION
ALKALINE EARTH METALS
ATMOSPHERES
ELEMENTS
METALS
SOLAR ATMOSPHERE
SPECTRA
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources