Abstract
view Abstract Citations (90) References (44) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The subdwarfs helium abundance and the rotation of the galactic halo. Carney, B. W. Abstract Temperatures, barometric corrections, and metallicities for eight subdwarfs with good trigonometric parallaxes and 10 Hyades dwarfs are used to determine that subdwarfs lie well below the Hyades in the luminosity-temperature diagram. The subdwarf locus is compared to the theoretical isochrones of Ciardullo and Demarque to derive a subdwarf helium mass fraction. The adopted distance callibration is used to investigate the kinematics of the subdwarfs. Upon adopting 250 km/s as the rotational velocity of the local standard of rest about the galactic center, several subdwarfs were found to be moving in retrograde orbits while others were moving in direct circular orbits exceeding 400 km/s. Publication: The Astrophysical Journal Pub Date: November 1979 DOI: 10.1086/157450 Bibcode: 1979ApJ...233..877C Keywords: Abundance; Galactic Rotation; Helium; Milky Way Galaxy; Subdwarf Stars; Big Bang Cosmology; Radial Velocity; Stellar Luminosity; Stellar Motions; Stellar Temperature; Velocity Measurement; Astrophysics; Galactic Halo:Rotation; Helium:Subdwarfs full text sources ADS | data products SIMBAD (93)
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