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Abstract.The methods used for classification of Population II stars in the Vilnius photometric system are described. An extensive set of standards with known astrophysical parameters compiled from the literature sources is given. These standard stars are classified in the Vilnius photometric system using the methods described. The accuracy of classification is evaluated by a comparison of the astrophysical parameters derived from the Vilnius photometric system with those estimated from spectroscopic studies as well as from photometric data in other systems. For dwarfs and subdwarfs, we find a satisfactory agreement between our reddenings and those estimated in the uvby/3 system. The standard deviation of [Fe/H] determined in the Vilnius system is about 0.2 dex. The absolute magnitude for dwarfs and subdwarfs is estimated with an accuracy of <0.5 mag.

Abstract.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, metaldeficient 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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