-
Living Reference Work Entry In depth
SPIRou: A nIR Spectropolarimeter/High-precision Velocimeter for the CFHT
SPIRou is a near-infrared (nIR) spectropolarimeter/velocimeter for the Canada-France-Hawaii Telescope (CFHT) that will focus on two forefront science topics, (i) the quest for habitable Earthlike planets aroun...
-
Article
A hot Jupiter orbiting a 2-million-year-old solar-mass T Tauri star
The radial velocities of a young star are measured, revealing the presence of a planet of mass about three-quarters that of Jupiter, orbiting its host star very closely, and thus demonstrating that ‘hot Jupite...
-
Chapter
Magnetic Field and Convection in the Cool Supergiant Betelgeuse
We present the outcome of a highly-sensitive search for magnetic fields on the cool supergiant Betelgeuse. A time-series of six circularly polarized spectra was obtained using the NARVAL spectropolarimeter at ...
-
Chapter and Conference Paper
High-Resolution Spectropolarimetry on the VLT
We outline here the new and unique science avenues that a high-resolution visible and near infrared spectropolarimeter would allow us to explore. Such an instrument should lead to major advances in our underst...
-
Chapter and Conference Paper
High-Resolution Spectropolarimetry on the VLT
We outline here the new and unique science avenues that a high-resolution visible and near infrared spectropolarimeter would allow us to explore. Such an instrument should lead to major advances in our underst...
-
Chapter
Differential Rotation of Close Binary Stars: Application to HR 1099
We propose a new method for estimating differentialrotation in binary stars, for which only moderate to poor phase coverage can be obtained (rotation period of order of a few days), preventing the use of conve...
-
Chapter
Imaging the Magnetic Topologies of Cool Active Stars
In the last decade, new indirect imaging techniques have been proposed to unveil the surface magnetic topologies of rapidly rotating active stars, which are found to be vastly different from that of the Sun. A...
-
Chapter and Conference Paper
First Results of the November 1996 MUSICOS Campaign on the 07.5III Star ξ Persei
We present the first results of the MUSICOS campaign on the 07.5III star ξ Persei, held in November 1996, which was aimed to study its wind variability, rotation, pulsation and magnetic field in order to study th...
-
Chapter and Conference Paper
MUSICOS Observations of SU Aurigae
We present results from the MUSICOS (MUlti-Slte COntinuous Spectroscopy) campaign 1996 on the classical T Tauri star SU Aurigae. Our observations support the suggestion that the wind and infall signatures are ...
-
Chapter
Magnetic Structures and Giant Flares in HR1099
We describe results from the December 1989 multi-site continuous observing campaign (MUSICOS 89 with 17 telescopes around the globe) dedicated to the study of active structures and flares on the RS CVn system ...
-
Article
Azimuthal structures in the wind and chromosphere of the herbig Ae star ab aur. preliminary results from the MUSICOS 1992 campaign
MUSICOS (for MUlti-SIte COntinuous Spectroscopy) is an international project to facilitate and organize world-wide multi-site campaigns in high resolution spectroscopy, in view of obtaining a complete time cov...
-
Chapter and Conference Paper
Map** magnetic fields on rapidly rotating stars
-
Chapter and Conference Paper
Towards magnetic images of rapidly rotating late-type stars
We present the first magnetic detections using Zeeman-Doppler Imaging (ZDI) in the two bright rapidly rotating RS CVn systems HR 1099 and σ 2 CrB, and discuss their compatibility with various recent results on ma...
-
Article
Zeeman-doppler imaging: A new option for magnetic field study of Ap and solar-type stars
In the task of studying stellar magnetic fields, polarimetric methods have been intensively used in Ap stars. But the observational material classically used to reconstruct stellar magnetic structures (average...