The spectra of G dwarf stars toward the Galactic Poles

Details The spectra of G dwarf stars toward the Galactic Poles The spectra of G dwarf stars toward the Galactic Poles

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.2301g&link_type=abstract

The Astronomical Journal (ISSN 0004-6256), vol. 106, no. 6, p. 2301-2308

Astronomy and Astrophysics

Astronomy

3

Astronomical Spectroscopy, Dwarf Stars, G Stars, Milky Way Galaxy, Polar Regions, Stellar Spectra, Metallicity, Signal To Noise Ratios, Solar Neighborhood, Stellar Atmospheres

Scientific paper

Slit spectra of 299 faint, early G dwarf candidates in the directions of the North and South Galactic Poles have been classified on the MK system. An expediency, employing the normal MK standards, was followed to cope with the 40% of stars which proved to have weak-lined spectra. We present these classifications to show what G dwarf stars in the thick disk region of the Galaxy are really like spectroscopically. From the whole spectrum perspective they do resemble the stars of equivalent metallicity in the solar neighborhood. The spectra of several interesting stars are discussed. We also note a tendency for the G-band strength to decrease less fast than the overall line weakening in the metal-weak stars.

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