Theoretical implications of wide binary observations

Details Theoretical implications of wide binary observations Theoretical implications of wide binary observations

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..390w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 1, 1987, p. 390-401.

Astronomy and Astrophysics

Astrophysics

23

Astrodynamics, Binary Stars, Stellar Evolution, Astronomical Models, Dark Matter, Density Distribution, Galactic Structure

Scientific paper

The theoretical implications of the recent Latham, et al. (1984) data on wide binaries are examined. Using a technique for comparing wide binary observations with theoretical semimajor axis distributions, it is concluded that power-law models for the underlying distribution are consistent with observations, implying no sharp cutoffs in the semimajor axis distribution. Repeating the analysis for simple evolutionary models, it is found that the available data do not yet significantly limit the mass of dark matter particles. The detection of six wide binaries by Latham et al. (1984) would require an uncomfortably large local density of wide binaries (semimajor axes of at least about 0.001 pc) for a broad range of theoretical models. The data suggest that wide binaries are predominantly made of F5-K5 stars and that a major fraction of all F5-K5 stars are in wide binaries.

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