A Photometric Search for Halo Binaries - Part Two - Results

Details A Photometric Search for Halo Binaries - Part Two - Results A Photometric Search for Halo Binaries - Part Two - Results

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..623c&link_type=abstract

ASTRONOMICAL JOURNAL V. 88, P. 623, 1983

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206

Scientific paper

The author presents the results of a search for binaries in 71 halo dwarf stars, plus a few other dwarfs of special interest. The technique involves metallicity-insensitive blue versus infrared colors, and is based on uvbyUBVRIJHK photometry, much of which was presented in the preceding paper. Two of the four known binaries, one of the five previously suggested radial velocity variables, and five new candidates are detected. Given that the method's binary detection efficiency is about 50%, the author concludes the halo dwarf binary frequency may be as high as 20%-25%. He discusses some other valuable results of such extensive photometry: the dwarfs' temperature scale, bolometric corrections, and reddening determinations for stars with 4500 ≤ Teff ≤ 7000K.

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