Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...402.1055m&link_type=abstract
Astronomy and Astrophysics, v.402, p.1055-1060 (2003)
Astronomy and Astrophysics
Astrophysics
12
Stars: Binaries Eclipsing, Stars: Luminosity Fonction, Mass Fonction
Scientific paper
We have compared radii of eclipsing binary components and single stars. We have found a noticeable difference for B0V-G0V components of eclipsing binaries and single stars of the corresponding spectral type. This difference can be confirmed by a re-analysis of results of other published investigations and, in particular, it can explain the disagreement between published scales of bolometric corrections.
According to our results, A- and F-type main sequence eclipsing binaries have larger radii and/or higher temperatures than single stars while B-type eclipsing binaries have smaller radii. Possible explanations for these features are proposed.
We have concluded that the mass-luminosity relation based on empirical data of eclipsing binary components cannot be used to derive the stellar initial mass function. While our current knowledge of the empirical mass-luminosity relation for masses more than 1.5 m_sun is based exclusively on eclipsing binaries data, accurate observational data for a few hundred visual binaries of intermediate and high masses should be collected. Then the initial mass function for this mass range should be revised.
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