Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85..812c&link_type=abstract
Astronomical Journal, vol. 85, July 1980, p. 812-823.
Astronomy and Astrophysics
Astronomy
49
Astrometry, Main Sequence Stars, Star Distribution, Stellar Luminosity, White Dwarf Stars, Density Distribution, Error Analysis, Galactic Structure, Hertzsprung-Russell Diagram, Stellar Spectrophotometry, Subdwarf Stars
Scientific paper
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.
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