Magnetic observations of pulsating B and Be stars with ESPaDOnS and Narval

• Published in: Proceedings of the International Astronomical Union
• Main Authors: Silvester, James, Neiner, Coralie, Henrichs, Hubertus F., Wade, Gregg, Alecian, Evelyne, Petit, Veronique
• Other Authors: Department of Physics, Engineering Physics and Astronomy, Queen's University, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique stellaire et galactique, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam Amsterdam = Universiteit van Amsterdam (UvA), Department of Physics, Royal Military College of Canada, Département de Physique, Université de Montréal, Strassmeier, Klaus G.; Kosovichev, Alexander G.; Beckman, John E.
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2008
• Subjects: [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]; narval
• Online Access: https://hal.science/hal-03734446; https://doi.org/10.1017/S1743921309030816

International audience Discoveries of magnetic fields in pulsating B and Be stars have been claimed from low-resolution spectropolarimetric observations with FORS1 at VLT. We used the new generation of high-resolution spectropolarimeters, ESPaDOnS at CFHT and NARVAL at TBL, to check for the existence of these fields. We find that most of the claimed magnetic stars do not host a magnetic field. This work shows the importance of a critical analysis of FORS1 data when searching for weak magnetic fields in early-type stars and the advantage of using ESPaDOnS and NARVAL to study such type of stars.