Stellar population study in the galactic direction (l=~0deg, b=~45deg).

Details Stellar population study in the galactic direction (l=~0deg, b=~45deg). Stellar population study in the galactic direction (l=~0deg, b=~45deg).

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...298..107p&link_type=abstract

Astronomy and Astrophysics, v.298, p.107

Statistics

8

Galaxy: Stellar Content, Kinematics And Dynamics, Stars: Statistics, Population Ii

Scientific paper

Quantitative medium resolution spectroscopic observations have been performed on a sample of stars in a field of 9.6 square degrees in the galactic direction (l=~0deg, b=~45deg), for which proper motions and photographic photometry have been recently obtained. Radial velocities, effective temperatures, surface gravities and metallicities have been derived, leading to a complete set of kinematic and astrophysical parameters for 28 stars, with apparent V magnitudes near 14.25 and B-V in the range 0.93-1.03, to allow a safe discrimination between dwarfs and giants from the Mg I green triplet. The main finding of these observations is the very low proportion of population II giants in this direction, about 5 to 10 times less than the predictions of current galactic models. A discussion of this result in connection with similar works available in the literature is presented.

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