Effect of binarity on the local stellar mass density

Details Effect of binarity on the local stellar mass density Effect of binarity on the local stellar mass density

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ncimc...8..415m&link_type=abstract

Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 8, July-Aug. 1985, p. 415-417.

Astronomy and Astrophysics

Astrophysics

Binary Stars, Missing Mass (Astrophysics), Stellar Mass, Star Distribution, Stellar Luminosity

Scientific paper

The local stellar luminosity function (SLF) defined by Wielen (1974) is used in conjunction with the number of stars in Gliese's (1969) catalog to estimate the masses of binary star companions which have not been detected. The value is considered important for estimations of the nature of missing mass in the universe. The unresolved stars are assumed constant along the main sequence. Correcting for possible binaries causes some of the recorded stars to be shifted to the lower bin in the SLF distribution. Then, extrapolating from the local mass function in the solar neighborhood, the shifted unresolved stars are suggested to all have periods under 3 yr and to make up 0.4 of all binary stars. This corresponds to a missing mass of 0.004 solar mass/pc.

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