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Communication Dans Un Congrès Année : 2009

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

Résumé

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.

Dates et versions

hal-03734446 , version 1 (21-07-2022)

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James Silvester, Coralie Neiner, Hubertus F. Henrichs, Gregg Wade, Evelyne Alecian, et al.. Magnetic observations of pulsating B and Be stars with ESPaDOnS and Narval. Cosmic Magnetic Fields: from Planets, to Stars and Galaxies, IAU Symposium 259, Nov 2008, Puerto Santiago, Tenerife, Spain, Spain. pp.391-392, ⟨10.1017/S1743921309030816⟩. ⟨hal-03734446⟩
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