Space motions of galactic G- and K-type stars

Abstract

Spectra of 912 G- and K -type stars in six galactic directions (⁠lII=90∘,bII=±20∘;lII=180∘,bII=±20∘;lII=90∘,bII=+45∘;bII=+90∘⁠) have been secured. The relevant space motions of the stars, subdivided into distance groups have been derived and these show no significant departures from the mean motion of nearby stars. The velocity dispersions, in general, indicate that these (mainly giant) stars are moderately old. The dispersion in u, however, is lower than that for nearby stars and the significance of this result is discussed.