The magnetic field of ζ Ori A
Abstract
Magnetic fields play a significant role in the evolution of massive stars. About 7% of massive stars are found to be magnetic at a level detectable with current instrumentation (Wade et al. 2013) and only a few magnetic O stars are known. Detecting magnetic field in O stars is particularly challenging because they only have few, often broad, lines to measure the field, which leads to a deficit in the knowledge of the basic magnetic properties of O stars. We present new spectropolarimetric Narval observations of ζ Ori A. We also provide a new analysis of both the new and older data taking binarity into account. The aim of this study was to confirm the presence of a magnetic field in ζ Ori A. We identify that it belongs to ζ Ori Aa and characterize it.
- Publication:
-
New Windows on Massive Stars
- Pub Date:
- January 2015
- DOI:
- 10.1017/S1743921314007108
- arXiv:
- arXiv:1408.0178
- Bibcode:
- 2015IAUS..307..367B
- Keywords:
-
- stars: magnetic fields;
- stars: early-type;
- stars: individual (ζ Ori A);
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- proceedings of IAUS 307