Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sf2a.conf..497m&link_type=abstract
SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: G. Alecian, K. Belkacem,
Astronomy and Astrophysics
Astrophysics
Stars: Atmospheres, Stars: Low-Mass, Stars: Magnetic Field, Stars: Solar-Type
Scientific paper
A sample of 19 Sun-like stars, probing masses between 0.7 and 1.4 solar mass and rotation rates between 1 and 3 solar rotation rate, was regularly observed using the NARVAL spectropolarimeter at Telescope Bernard Lyot (Pic du Midi, France) since 2006. The data sets enable us to monitor the rotational and long-term evolution of indirect activity indicators such as the width of several magnetically-sensitive spectral lines, the radial velocities, the line asymmetry of intensity line profiles and the chromospheric emission in the cores of the Ca II H and Halpha lines. In the same time, the Zeeman-Doppler Imaging allowed us to study the reconstructed large-scale photospheric magnetic field. I will present the main results of this monitoring, which includes the observations of several polarity reversals and magnetic cycles, and the highlight of links between some of our computed quantities and some fundamental parameters of the stars.
Auriere Michel
Dintrans Boris
Morgenthaler A.
Morin Julien
Petit Pacal
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