Scanner studies of composite spectra. II - Giants and dwarfs

Abstract

view Abstract Citations (10) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Scanner studies of composite spectra. II. Giants and dwarfs. Beavers, W. I. Abstract A set of line and continuum indices is calibrated as a function of spectral type, over the range late O-early G for giants, using low resolution scanner observations in the 3500-4400 A region. Line or feature indices are defined for H-gamma, G band, Ca I (4227 A), Ca II (K), H 3889, and the Balmer jump. The combination of the results with those for standard-luminosity class IV-V stars allows the analysis of composite-spectrum objects. The spectrum scans of 58 visual, spectroscopic and eclipsing pairs are compared with a grid of calculated composites, and a computer program is used to generate giant-giant, giant-dwarf and dwarf-dwarf pairs of composites for comparison with observations. A set of 11 dwarf stars treated in Beavers and Cook (1980) is reexamined using a version of the computer program which fixes Delta(m) for the synthesis procedure to agree with values found in the literature. Publication: The Astrophysical Journal Supplement Series Pub Date: June 1982 DOI: 10.1086/190799 Bibcode: 1982ApJS...49..273B Keywords: Binary Stars; Dwarf Stars; Giant Stars; Stellar Spectra; Stellar Spectrophotometry; Balmer Series; Calibrating; Computer Programs; Eclipsing Binary Stars; G Stars; H Gamma Line; Line Spectra; Scanners; Stellar Luminosity; Astronomy full text sources ADS | data products SIMBAD (29)