VLT multi-object spectroscopy of 33 eclipsing binaries in the Small Magellanic Cloud
New distance and depth of the SMC, and a record-breaking apsidal motion (Corrigendum)
P. North1, R. Gauderon1, F. Barblan2 and F. Royer3
1 Laboratoire d’Astrophysique, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire, 1290 Versoix, Switzerland
2 Geneva Observatory, Geneva University, 1290 Sauverny, Switzerland
3 GEPI, UMR 8111 du CNRS, Observatoire de Paris-Meudon, 92195 Meudon Cedex, France
Key words: binaries: eclipsing / binaries: spectroscopic / stars: early type / Magellanic Clouds / stars: fundamental parameters / Errata, addenda
Comparison with theoretical evolutionary models: difference between the evolutionary and observed masses.
Minus signs had been accidentally dropped in Table 9, which compares the dynamical mass with the theoretical mass obtained from interpolation of evolutionary tracks in the HR diagram. Furthermore, the error bars had been omitted. We provide here the corrected Table 9. The errors on Δℳ are computed according to the formula where ℳ is the dynamical mass and ℳint is the mass interpolated in the HR diagram from the theoretical evolutionary tracks. One has with Teff,max,min = Teff ± σ(Teff) and Lmax,min = L ± σ(L).
The interpolation procedure was tested by running it on a grid of only 5 evolutionary tracks (3, 5, 9, 15, 25 M⊙) instead of 9 (2.5, 3, 4, 5, 7, 9, 12, 15, 20 M⊙); it recovered the values interpolated in the full grid to better than 0.01 M⊙ in most cases, an to within a few times 0.01 M⊙ in some unfavourable cases.
Figure 9, which corresponds to Table 9, was correct.
These corrections do not affect the conclusion that many components of detached systems appear slightly overluminous for their dynamical mass, or that their evolutionary mass tend to be larger than their dynamical mass, a trend also pointed out recently by Massey et al. (2012).
- Massey, P., Morrell, N. I., Neugent, K. F., et al. 2012, ApJ, in press [arXiv:astro-ph/1201.3280] (In the text)
© ESO, 2012