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6 Result(s)

within J. F. Donati Remove this filter Physics Remove this filter Astrophysics and Astroparticles Remove this filter Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) Remove this filter

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  1. No Access

    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 ...

    P. Petit, M. Aurière, R. Konstantinova-Antova… in The Environments of the Sun and the Stars (2013)

  2. No Access

    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...

    J.-F. Donati, C. Catala, G. Mathys… in Scientific Drivers for ESO Future VLT/VLTI… (2002)

  3. No Access

    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...

    H. Henrichs, J. de Jong, C. Catala, J.-F. Donati… in Cyclical Variability in Stellar Winds (1998)

  4. No Access

    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 ...

    Yvonne C. Unruh, J.-F. Donati in Cyclical Variability in Stellar Winds (1998)

  5. No Access

    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...

    C. Catala, T. Böhm, J. -F. Donati, T. Simon, A. Welty, E. Houdebine… in Solar Physics (1994)

  6. No Access

    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...

    J. F. Donati, M. Semel in Solar Physics (1990)