Masses of red giants. I - Mean initial mass from visual binary data

Details Masses of red giants. I - Mean initial mass from visual binary data Masses of red giants. I - Mean initial mass from visual binary data

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221..616s&link_type=abstract

Astrophysical Journal, Part 1, vol. 221, Apr. 15, 1978, p. 616-626.

Astronomy and Astrophysics

Astrophysics

40

Binary Stars, Mass Distribution, Red Giant Stars, Stellar Evolution, Stellar Mass, Abundance, Companion Stars, Frequency Distribution, Star Distribution, Stellar Luminosity, Stellar Spectrophotometry

Scientific paper

Existing information on red-giant masses is reviewed, and an independent method for determining the frequency distribution of initial masses of red giants is presented which is based on analysis of visual binary systems containing a red giant and a main-sequence star (RG-MS systems). A list of RG-MS systems is compiled which yields an apparent frequency distribution of the spectral types of the secondaries. This apparent distribution is transformed to a 'true' distribution of secondary masses by accounting for certain selection effects; the true distribution is then transformed into a distribution of initial primary masses (i.e., initial masses of red-giant components) by assuming a form for the distribution of mass ratios. Values in the range from 0.8 to 1.2 solar masses and an upper limit of 1.4 solar masses are determined for the mean initial masses of red giants and shown to be in satisfactory agreement with the theoretical prediction of about 1 solar mass.

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