Local dark matter from a carefully selected sample

Details Local dark matter from a carefully selected sample Local dark matter from a carefully selected sample

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...389..234b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 389, April 10, 1992, p. 234-250. Research supported by Alexander von Humbol

Astronomy and Astrophysics

Astrophysics

152

Dark Matter, Galactic Structure, Giant Stars, K Stars, Late Stars, Milky Way Galaxy, Metallicity, Poisson Equation, Stellar Luminosity, Stellar Magnitude, Stellar Models, Velocity Distribution

Scientific paper

The precise data obtained by Flynn and Freeman (1991) on K giants at the south Galactic pole are used to analyze the amount of local dark matter in which the systematic effects can be modeled easily and evaluated accurately. The method of Bahcall (1984) is employed to solve the self-consistent equations for the distribution of dark matter. The K-giant survey is found to provide significant evidence for disk dark matter. Taking into account all recognized sources of error using a statistical test devised by Gould (1989, 1990), a model with no dark matter is inconsistent with the data at the 86-percent confidence level. The best-fit P-model (in which dark matter is distributed proportionally to known matter) has 53 percent more dark matter than visible matter.

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