High-dispersion spectroscopic investigation of field horizontal-branch, high-luminosity, and main-sequence stars

Abstract

view Abstract Citations (15) References (35) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS High-dispersion spectroscopic investigation of field horizontal-branch, high-luminosity, and main-sequence stars. Kodaira, K. ; Philip, A. G. D. Abstract High-dispersion spectra (12.5 A/mm) were taken of 11 early-type stars with the Cassegrain image-tube spectrograph on the CTIO 4 m telescope, in order to improve previous classifications based on low-dispersion and/or photometric studies. Atmospheric parameters were determined, as well as interstellar reddenings and radial velocities. Five of the stars were classified as field horizontal-branch stars, two as high-luminosity stars, three as main-sequence stars, and one as an RR Lyrae variable star. Abundances of 11 elements were derived for the five field horizontal-branch stars and for one moderate high-luminosity star. A wide range of variation in (Ca/Fe) was detected, and its implications are discussed briefly. Publication: The Astrophysical Journal Pub Date: March 1984 DOI: 10.1086/161783 Bibcode: 1984ApJ...278..208K Keywords: Astronomical Spectroscopy; Early Stars; High Dispersion Spectrographs; Horizontal Branch Stars; Main Sequence Stars; Stellar Atmospheres; Abundance; Chemical Composition; Interstellar Extinction; Line Spectra; Radial Velocity; Variable Stars; Astrophysics full text sources ADS | data products SIMBAD (11)