A search for distant stars in the Milky Way Galaxy's halo and thick disk

Abstract

view Abstract Citations (33) References (74) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Search for Distant Stars in the Milky Way Galaxy's Halo and Thick Disk Croswell, Ken ; Latham, David W. ; Carney, Bruce W. ; Schuster, William ; Aguilar, Luis Abstract In situ observations of 247 faint, distant stars with B-V less than or equal to 1.00 are reported near the north galactic pole in the galactic halo or thick disk. Omega velocities for all of the stars and luminosities, distances, and metallicities for half of the stars are given. Thick-disk and halo stars comprise the majority of the sample which is divided into three populations. The specific metallicities and velocity dispersions of the thin disk, thick disk, and the halo are presented, and speculations are made for the stars that comprise a more distant, faint halo. The stars in the thick disk are described as red and old, and two faint stars are employed to estimate the mass of the galaxy. About 10 percent of the observed stars are in fact galaxies, although none of the motions of the halo, O, A, B, or zero-metal stars show any evidence of imbalance. The possibility that a halo moving group exists within the sample is shown to be improbable. Publication: The Astronomical Journal Pub Date: June 1991 DOI: 10.1086/115830 Bibcode: 1991AJ....101.2078C Keywords: Faint Objects; Galactic Structure; Milky Way Galaxy; Stellar Luminosity; Abundance; Metallicity; Stellar Spectrophotometry; Astrophysics; GALAXIES: THE GALAXY; STARS: HIGH-VELOCITY; STARS: POPULATION II; STARS: WEAK-LINE; STARS: SUBDWARFS full text sources ADS | data products SIMBAD (248)