Spectrophotometry of low-luminosity stars with the Carnegie image tube

Details Spectrophotometry of low-luminosity stars with the Carnegie image tube Spectrophotometry of low-luminosity stars with the Carnegie image tube

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90..207c&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Apr.-May 1978, p. 207-215.

Astronomy and Astrophysics

Astronomy

1

Dwarf Stars, Image Tubes, Stellar Luminosity, Stellar Spectra, Stellar Spectrophotometry, Abundance, Binary Stars, Spectrograms, Stellar Temperature, Wavelengths

Scientific paper

An observational method involving an image-tube spectrograph and a 1.02-m telescope provided detailed spectral data between 4500 and 6700 A for stars having violet magnitudes as faint as 15. The relative intensity curves of several low-luminosity stars were investigated through use of the technique, which provides a resolution of 25 A. The observations confirmed that Barnard's Star possesses the magnesium and sodium absorption features previously ascribed to it. In addition, a study of the common proper-motion pair G107-69/70 indicated that the G107-70 spectrum lacks an M-dwarf component and that the G107-69 star is a subdwarf analogous to Barnard's Star.

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