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High-resolution spectropolarimetric observations of hot subdwarfs
P. Petit, V. Van Grootel, S. Bagnulo +3
We report on high-resolution spectropolarimetric observations of the hot subdwarf stars HD 76431 and Feige 66, using the ESPaDOnS echelle spectropolarimeter at CFHT. We compute cro…
First evidence of pulsations in Vega? Results of today's most extensive spectroscopic search
Torsten Böhm, François Lignières, Gregg Wade +5
The impact of rapid rotation on stellar evolution theory remains poorly understood as of today. Vega is a special object in this context as spectroscopic and interferometric studie…
Long-term magnetic field stability of Vega
D. Alina, P. Petit, F. Lignières +5
We present new spectropolarimetric observations of the normal A-type star Vega, obtained during the summer of 2010 with NARVAL at Télescope Bernard Lyot (Pic du Midi Observatory).…