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Radial Velocities of Population II Stars. II.

Bartkevičius, A.; Sperauskas, J.

A program for radial velocity measurements of Population II stars was started in 1988 and was carried out during six observing runs. The program includes metal-deficient stars, components of Population II visual binaries or common proper motion stars, suspected radial velocity variables and the Population II stars from the Hipparcos program. The m…

Photoelectric Vilnius Photometry of Hipparcos Turn-Off Region Stars

Ezhkova, O. V.; Lazauskaite, R.; Bartasiute, S.

Seven-color photometry in the Vilnius system and photometric classification in terms of spectral type, absolute magnitude and metallicity are presented for 145 Hipparcos stars of the turn-off region, most of which have parallaxes determined to an accuracy of at least 15%. The stars selected for the observing program included those identified kinem…