Query : 2003A&A...402.1055M

2003A&A...402.1055M - Astronomy and Astrophysics, volume 402, 1055-1060 (2003/5-2)

Eclipsing binaries and the mass-luminosity relation.


Abstract (from CDS):

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 1.5M 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.

Abstract Copyright:

Journal keyword(s): stars: binaries eclipsing - stars: luminosity fonction, mass fonction

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 * zet Phe EB* 01 08 23.0814982 -55 14 44.728914   3.908 4.014     B6V+B9V 227 0
2 * bet Aur EB* 05 59 31.7229284 +44 56 50.757259 1.97 1.93 1.90 1.82 1.83 A1IV-Vp 410 0
3 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A0mA1Va 1468 0
4 HD 176051A PM* 18 57 01.6366461792 +32 54 04.748586012   5.83 5.277     F9V 25 0

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