Unresolved binaries and the stellar luminosity function

Details Unresolved binaries and the stellar luminosity function Unresolved binaries and the stellar luminosity function

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247...87p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 1, July 1991, p. 87-90.

Astronomy and Astrophysics

Astrophysics

19

Binary Stars, Stellar Luminosity, Star Distribution, Stellar Spectrophotometry

Scientific paper

The influence of photometrically unresolved binaries on the luminosity function is studied. Assuming that the local luminosity function (LF) reflects a distribution of unresolved binaries under different assumptions on the properties of a set of unresolved binaries, the corresponding luminosity functions of their components are constructed. the effect depends on the distribution of the component mass ratio q, and differs for different portions of the LF. For brighter stars the effect is small. Around the LF maximum, it is strongest in the case when both components are of similar mass. The most prominent difference was found in the region of the faintest stars (Mv above 20 mag), where the effect is strongest if low-q systems are frequent.

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