Mean Absolute Magnitude of High-Latitude Blue Stars.

Abstract

view Abstract Citations (1) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Mean Absolute Magnitude of High-Latitude Blue Stars. Klemola, Arnold R. Abstract A sample of tenth to twelfth magnitude blue stars located at high galactic latitudes has been investigated for mean absolute magnitude by means of the tan and upsilon components of the proper motions. Low-dispersion spectra, together with colors on the U,B,V system, permitted the segregation of the 205 stars into apparently homogeneous groups. For stars with low-dispersion spectra similar to normal main-sequence stars the tan component method yielded a mean absolute visual magnitude of + 2.1 for the group B0-3 (11 stars), +0.9 for the group B4-7 (19 stars), +1.5 for the group B8-A0 (42 stars), and +3.6 for the group Al-S (27 stars). The estimated uncertainty for each group is about one or two magnitudes. Other smaller groups of stars with spectra similar to hot subdwarfs, white dwarfs, and other stellar species are also recognized. The results indicate that at least those high-galactic-latitude stars of tenth to twelfth apparent magnitude with spectra like main-Sequence early B stars may be largely horizontal-branch type objects. Publication: The Astronomical Journal Pub Date: 1962 DOI: 10.1086/108651 Bibcode: 1962AJ.....67R.275K full text sources ADS |