Spectra of the M dwarf companion in U Geminorum

Details Spectra of the M dwarf companion in U Geminorum Spectra of the M dwarf companion in U Geminorum

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pasp...91...59s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 91, Feb.-Mar. 1979, p. 59-61.

Astronomy and Astrophysics

Astronomy

11

Binary Stars, Companion Stars, Dwarf Stars, M Stars, Novae, Stellar Spectra, H Alpha Line, Infrared Spectra, Molecular Spectra, Near Infrared Radiation, Stellar Spectrophotometry, Titanium Oxides

Scientific paper

Spectroscopic scans of the U Gem system in the red and near-IR are reported. A composite spectrum is plotted which reveals that the secondary star in U Gem is an M dwarf whose spectrum contains a strong CaH feature at 6385 A and at least three TiO bands. The best estimate of the secondary's spectral type is shown to be dM4.5 with a probable error of about half a spectral class. The emission-line behavior of the U Gem system is briefly discussed.

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