Luminosity functions of disk and halo populations in SA 51, SA 57, and SA 68

Abstract

view Abstract Citations (55) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Luminosity functions of disk and halo populations in SA 51, SA 57, and SA 68 Chiu, L. -T. G. Abstract An investigation of the luminosity functions of Population I main-sequence stars, Population I white dwarfs, and Population II subdwarfs in SA 51, SA 57, and SA 68 is made using the V'/V'(m) method. The luminosity function of Population I main-sequence stars in the sample depends on the scale height z(0) adopted. The permissible range of z(0), using the V'/V'(m) test, is 300-500 pc. From kinematic considerations, it is argued that the appropriate z(0) for the present sample is 500 pc. The space density of Population I white dwarfs is estimated to be 0.02/cu pc. The scale height for Population I white dwarfs is 400-500 pc. The local mass density of Population II objects is estimated to be 0.0003 solar mass/cu pc. Publication: The Astronomical Journal Pub Date: July 1980 DOI: 10.1086/112743 Bibcode: 1980AJ.....85..812C Keywords: Astrometry; Main Sequence Stars; Star Distribution; Stellar Luminosity; White Dwarf Stars; Density Distribution; Error Analysis; Galactic Structure; Hertzsprung-Russell Diagram; Stellar Spectrophotometry; Subdwarf Stars; Astronomy full text sources ADS |