| Issue |
EAS Publications Series
Volume 64, 2013
Setting a New Standard in the Analysis of Binary Stars
|
|
|---|---|---|
| Page(s) | 411 - 412 | |
| Section | Posters | |
| DOI | https://doi.org/10.1051/eas/1364070 | |
| Published online | 25 February 2014 | |
K. Pavlovski, A. Tkachenko and G. Torres (eds)
EAS Publications Series, 64 (2013) 411–412
HD 152246, a new high-mass triple system – preliminary results
1 Astronomisches Institut, Ruhr-Universität Bochum, Germany,
2 Instituto de Astronomía, Universidad Católica del Norte, Antofagasta, Chile
3 Astronomical Institute of the Charles University, Faculty of Mathematics and Physics, Praha, Czech Republic
4 Thüringer Landessternwarte Tautenburg, Germany
5 Space Telescope Science Institute, Baltimore, USA
Multi-epoch, high-resolution (R ∼ 50 000) optical spectrosco-py of the O-type (O9 III – IV) star HD 152246 suggests that it is a triple system where a close inner pair (Aa–Ab) with a circular orbit and a period of 6 days is in a 53–d eccentric orbit (e = 0.68) with a third component Ac. The mass ratios for the inner and outer system are 0.10 and 0.96, respectively. The strengths of various He lines classify Aa and Ac as late O-type stars while Ab is invisible in our spectra.
© EAS, EDP Sciences, 2014