The mass density in our Galaxy. II - F dwarfs and K giants as density tracers

Details The mass density in our Galaxy. II - F dwarfs and K giants as density tracers The mass density in our Galaxy. II - F dwarfs and K giants as density tracers

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...211....1c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 211, no. 1, Feb. 1989, p. 1-8.

Mathematics

Probability

21

Dwarf Stars, F Stars, Giant Stars, K Stars, Milky Way Galaxy, Astronomical Models, Error Analysis, Mass Distribution, Probability Distribution Functions, Stellar Luminosity

Scientific paper

The method used by Bahcall (1984) in his computation of the density law of star samples obtained by Upgren (1962, 1963) is reexamined in order to determine the cause of the conflict between Bahcall's finding of large amounts of unseen mass and the estimate of mass density obtained by the method proposed by Bienayme et al. (1987). In particular, the fit of Bahcall's density models on the original Upgren star count data using the m-log(pi) method is discussed. It is shown that the m-log(pi) method provides estimates of the density that are significantly biased resulting in getting too much missing mass.

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