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The early-type close binary CV Velorum revisited | | K. Yakut
; C. Aerts
; Th. Morel
; | | Date: |
25 Jan 2007 | | Abstract: | 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 essentially 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: $M_1 = 6.066(74) M_odot$, $M_2 = 5.972(70) M_odot$, $R_1 = 4.126(24) R_odot$, $R_2 = 3.908(27) R_odot$, $log L_1 = 3.20(5) L_odot$, and $log L_2 = 3.14(5) L_odot$. 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. Finally, 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. | | Source: | arXiv, astro-ph/0701742 | | Services: | Forum | Review | PDF | Favorites | |
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