The Spectra of G Dwarf Stars Towards the Galactic Poles
Abstract
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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- December 1993
- DOI:
- 10.1086/116802
- Bibcode:
- 1993AJ....106.2301G
- Keywords:
-
- Astronomical Spectroscopy;
- Dwarf Stars;
- G Stars;
- Milky Way Galaxy;
- Polar Regions;
- Stellar Spectra;
- Metallicity;
- Signal To Noise Ratios;
- Solar Neighborhood;
- Stellar Atmospheres;
- Astronomy;
- STARS: PECULIAR;
- GALAXY: STELLAR CONTENT;
- GALAXY: CENTER