201 citations · 1.1k across the 38 of their papers we have counts for
8 papers · 1 filter
A Bcool magnetic snapshot survey of solar-type stars
S. C. Marsden, P. Petit, S. V. Jeffers +20
Stellar magnetic field measurements obtained from spectropolarimetry offer key data for activity and dynamo studies, and we present the results of a major high-resolution spectropo…
Magnetic fields in single late-type giants in the Solar vicinity: How common is magnetic activity on the giant branches?
R. Konstantinova-Antova, M. Aurière, C. Charbonnel +6
We present our first results on a new sample containing all single G,K and M giants down to V = 4 mag in the Solar vicinity, suitable for spectropolarimetric (Stokes V) observation…
Magnetic Field Structure and Activity of the He-burning Giant 37 Comae
S. Tsvetkova, P. Petit, R. Konstantinova-Antova +4
We present the first magnetic map of the late-type giant 37 Com. The Least Squares Deconvolution (LSD) method and Zeeman Doppler Imaging (ZDI) inversion technique were applied. The…
Descendants of Magnetic and non-Magnetic A-type Stars
M. Auriere, F. Lignieres, R. Konstantinova-Antova +4
We have studied the magnetic field of about 50 active and non-active single G-K-type red giants by means of spectropolarimetry with Narval and ESPaDOnS. 30 giants have been signifi…
Pollux: a stable weak dipolar magnetic field but no planet ?
Michel Auriere, Renada Konstantinova-Antova, Olivier Espagnet +5
Pollux is considered as an archetype of a giant star hosting a planet: its radial velocity (RV) presents sinusoidal variations with a period of about 590 d, which have been stable…
Search for surface magnetic fields in Mira stars. First detection in chi Cyg
A. Lèbre, M. Aurière, N. Fabas +4
In order to complete the knowledge of the magnetic field and of its influence during the transition from Asymptotic Giant Branch to Planetary Nebulae stages, we have undertaken a s…
Long-term spectropolarimetric monitoring of the cool supergiant Betelgeuse
I. Bedecarrax, P. Petit, M. Aurière +6
We report on a long-term monitoring of the cool supergiant Betelgeuse, using the NARVAL and ESPaDOnS high-resolution spectropolarimeters, respectively installed at Telescope Bernar…
Magnetic field structure in single late-type giants: Beta Ceti in 2010 - 2012
S. Tsvetkova, P. Petit, M. Auriere +5
The data were obtained using two spectropolarimeters - Narval at the Bernard Lyot Telescope, Pic du Midi, France, and ESPaDOnS at CFHT, Hawaii. Thirty-eight circularly-polarized sp…