The magnetic field of zeta Ori A

• Main Authors: Blazère, A., Neiner, C., Bouret, J-C., Tkachenko, A., MiMeS collaboration
• Format: Conference Object
• Language: English
• Published: 2014
• Subjects: narval
• Online Access: https://lirias.kuleuven.be/handle/123456789/467634; https://lirias.kuleuven.be/bitstream/123456789/467634/1//Blazere_et_al_2014.pdf

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 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 zeta 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 zeta Ori A. We identify that it belongs to zeta Ori Aa and characterize it. status: submitted