Classification of Population II Stars in the Vilnius Photometric System. II. Results

Details Classification of Population II Stars in the Vilnius Photometric System. II. Results Classification of Population II Stars in the Vilnius Photometric System. II. Results

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997balta...6..499b&link_type=abstract

Baltic Astronomy, v.6, p.499-572.

Astronomy and Astrophysics

Astronomy

7

Techniques: Photometric, Stars: Fundamental Parameters (Classification), Stars: Population Ii

Scientific paper

The results of photometric classification of 848 true and suspected Population II stars, some of which were found to belong to Population I, are presented. The stars were classified using a new calibration described in Paper I (Bartkevicius & Lazauskaite 1996). We combine these results with our results from Paper I and discuss in greater detail the following groups of stars: UU Herculis-type stars and other high-galactic-latitude supergiants, field red horizontal-branch stars, metal-deficient visual binaries, metal-deficient subgiants, stars from the Catalogue of Metal-deficient F--M Stars Classified Photometrically (MDPH; Bartkevicius 1993) and stars from one of the HIPPARCOS programs (Bartkevicius 1994a). It is confirmed that high galactic latitude supergiants from the Bartaya (1979) catalog are giants or even dwarfs. Some stars, identified by Rose (1985) and Tautvaisiene (1996a) as field RHB stars, appear to be ordinary giants according to our classification. Some of the visual binaries studied can be considered as physical pairs. Quite a large fraction of stars from the MDPH catalog are found to have solar metallicity. A number of new possible UU Herculis-type stars, RHB stars and metal-deficient subgiants are identified.

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