466 citations · 1.2k across the 18 of their papers we have counts for
18 papers
Studying stellar spin-down with Zeeman-Doppler magnetograms
V. See, M. Jardine, A. A. Vidotto +11
Magnetic activity and rotation are known to be intimately linked for low-mass stars. Understanding rotation evolution over the stellar lifetime is therefore an important goal withi…
Magnetic activity and hot Jupiters of young Suns: the weak-line T Tauri stars V819 Tau and V830 Tau
JF Donati, E Hébrard, G Hussain +19
We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri stars (wTTSs) V819 Tau and V830 Tau within the MaTYSSE programme, involving the ESPaD…
Cool Stars and Space Weather
A. A. Vidotto, M. Jardine, A. C. Cameron +8
Stellar flares, winds and coronal mass ejections form the space weather. They are signatures of the magnetic activity of cool stars and, since activity varies with age, mass and ro…
Modelling the magnetic activity & filtering radial velocity curves of young Suns: the weak-line T Tauri star LkCa 4
J. -F. Donati, E. Hebrard, G. Hussain +18
We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri star LkCa4 within the MaTYSSE programme, involving ESPaDOnS at the Canada-France-Hawa…
Modelling the Hidden Magnetic Field of Low-Mass Stars
P. Lang, M. Jardine, J. Morin +4
Zeeman-Doppler imaging is a spectropolarimetric technique that is used to map the large-scale surface magnetic fields of stars. These maps in turn are used to study the structure o…
Planetary protection in the extreme environments of low-mass stars
A. A. Vidotto, M. Jardine, J. Morin +3
Recent results showed that the magnetic field of M-dwarf (dM) stars, currently the main targets in searches for terrestrial planets, is very different from the solar one, both in t…
Can we predict the magnetic properties of PMS stars from their H-R diagram location?
S. G. Gregory, J. -F. Donati, J. Morin +4
Spectropolarimetric observations combined with tomographic imaging techniques have revealed that all pre-main sequence (PMS) stars host multipolar magnetic fields, ranging from str…
Influence of surface stressing on stellar coronae and winds
M. Jardine, A. A. Vidotto, A. van Ballegooijen +4
The large-scale field of the Sun is well represented by its lowest energy (or potential) state. Recent observations, by comparison, reveal that many solar-type stars show large-sca…
Evidence for dynamo bistability among very low mass stars
J. Morin, X. Delfosse, J. -F. Donati +5
Dynamo action in fully convective stars is a debated issue that also questions our understanding of magnetic field generation in partly convective Sun-like stars. During the past f…
Direct observation of magnetic cycles in Sun-like stars
A. Morgenthaler, P. Petit, J. Morin +4
A sample of 19 solar-type stars, probing masses between 0.6 and 1.4 solar mass and rotation periods between 3.4 and 43 days, was regularly observed using the NARVAL spectropolarime…
Long-term magnetic field monitoring of the Sun-like star ξBootis A
A. Morgenthaler, P. Petit, S. Saar +13
Aims. We aim to investigate the long-term temporal evolution of the magnetic field of the solar-type star ξBootis A, both from direct magnetic field measurements and from the simul…
Weak and Strong Field Dynamos: from the Earth to the stars
J. Morin, E. Dormy, M. Schrinner +1
Observations of magnetism in very low mass stars recently made important progress, revealing characteristics that are now to be understood in the framework of dynamo theory. In par…
Long-term magnetic field monitoring of the Sun-like star Ksi Bootis A
A. Morgenthaler, P. Petit, M. Auriere +11
Phase-resolved observations of the solar-type star Ksi Bootis A were obtained using the NARVAL spectropolarimeter at the Telescope Bernard Lyot (Pic du Midi, France) during years 2…
Exploring the magnetic topologies of cool stars
J. Morin, J. -F. Donati, P. Petit +19
Magnetic fields of cool stars can be directly investigated through the study of the Zeeman effect on photospheric spectral lines using several approaches. With spectroscopic measur…
Magnetospheric accretion and spin-down of the prototypical classical T Tauri star AATau
JF Donati, MB Skelly, J Bouvier +12
From observations collected with the ESPaDOnS & NARVAL spectropolarimeters at CFHT and TBL, we report the detection of Zeeman signatures on the prototypical classical TTauri star A…
Large-scale magnetic topologies of late M dwarfs
J. Morin, J. F. Donati, P. Petit +3
We present here the final results of the first spectropolarimetric survey of a small sample of active M dwarfs, aimed at providing observational constraints on dynamo action on bot…
A polarity reversal in the large-scale magnetic field of the rapidly rotating Sun HD 190771
P. Petit, B. Dintrans, A. Morgenthaler +5
Aims. We investigate the long-term evolution of the large-scale photospheric magnetic field geometry of the solar-type star HD 190771. With fundamental parameters very close to tho…
Large-scale magnetic topologies of M dwarfs
J. Morin, J. -F. Donati, X. Delfosse +2
We present here the first results of a spectropolarimetric analysis of a small sample (about 20) of active stars ranging from spectral type M0 to M8, which are either fully-convect…