Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1428r&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, Oct. 1991, p. 1428-1438.
Astronomy and Astrophysics
Astronomy
63
Binary Stars, Star Formation, Stellar Luminosity, Astronomical Photometry, Milky Way Galaxy, Parallax, Stellar Magnitude
Scientific paper
Results of simulations of the effect of unresolved binary stars on photometric parallax-based studies of the stellar luminosity function are presented. Starting with the luminosity function inferred from observations of the local stars (within 5 and 10 parsec), and using these data to constrain both the binary fraction (30 percent-50 percent of all systems) and the types of binaries, it is not possible to reconcile the predictions of the models with the luminosity function derived from photographic surveys, which use the method of photometric parallaxes to infer luminosities and distances. If the nearby stars represent a fair sample, binaries have little effect on photometric parallax studies of the luminosity function. It is suggested that unresolved binaries are not responsible for the differences between the latter analyses and the results derived from the sample of local stars.
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