SIMBAD references

2007A&A...467..647Y - Astronomy and Astrophysics, volume 467, 647-655 (2007/5-4)

The early-type close binary CV Velorum revisited.


Abstract (from CDS):

Our goal was to improve the fundamental parameters of the massive close double-lined eclipsing B2.5V+B2.5V binary CV Velorum. We gathered new high-resolution echelle spectroscopy on 13 almost consecutive nights covering two orbits. We computed a simultaneous solution to all the available high-quality radial-velocity and light data with the latest version of the Wilson-Deviney code. We obtained the following values for the physical parameters: M1=6.066(74)M, M2=5.972(70)M, R1=4.126(24)R, R2=3.908(27)R, logL1=3.20(5)L, and logL2=3.14(5)L. The quoted errors contain a realistic estimate of systematic uncertainties mainly stemming from the effective temperature estimation. We derived abundances for both components and found them to be compatible with those of B stars in the solar neighbourhood. We discovered low-amplitude periodic line-profile variations with the orbital frequency for both components. Their interpretation requires new data with a longer time span. The primary rotates subsynchronously while the secondary's vsin i and radius are compatible with synchronous rotation. We provide an update of the empirical mass-luminosity relation for main-sequence B stars which can be used for statistical predictions of masses or luminosities.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: oscillations - stars: binaries: eclipsing - stars: fundamental parameters - stars: evolution - stars: individual: CV Velorum

Errata: + corrigendum vol. 562, p. C2 (2014)

Simbad objects: 23

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