Absolute parameters of young stars: HX Velorum
Abstract
We present combined photometric and spectroscopic analyses of the southern multiple star HX Vel. High-resolution spectra of this system were taken at the University of Canterbury Mt. John Observatory in the years 2009-2015. Absolute parameters for HX Vel tend to confirm its young and near-main-sequence nature. We specify the main adopted parameters of the (non-eclipsing) close binary as follows: M1 = 8.5 ± 1.7, M2 = 5.4 ± 1.2, R1 = 5.0 ± 0.3, R2 = 3.1 ± 0.2, (⊙); T1 25 000 ± 1300, T2 20 000 ± 2500 (K); systemic MV -4.2 ± 0.2. These parameters are sensitive to the low inclination, where we find a small disparity between the photometrically optimal 28 ± 2° and an adopted value of 26° that gives better consistency with main-sequence stellar modelling.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 2019
- DOI:
- 10.1093/mnras/stz1136
- Bibcode:
- 2019MNRAS.487..161B
- Keywords:
-
- binaries: close;
- stars: early-type;
- stars: individual HX Vel;
- Galaxy: stellar content