Ultra-cool dwarfs with effective temperatures between ~1400 K and ~2200 K are known to have dusty atmospheres. Asymmetries of the dwarf surface may arise from...
Linear polarization due to scattering processes can be used as a probe of the existence of atmospheric condensates in ultracool dwarfs. Models predict that the...
We present the very first results of a full spectropolarimetric study (in the four Stokes parameters I, Q, U and V) performed with NARVAL at TBL, on the Mira...
Polarized hydrogen emission lines in Mira stars: a mystery behind the shock
We present a full spectropolarimetric study (in the Stokes parameters I, Q, U and V) on omicron Ceti (the prototype of Mira stars), and focus on the strong...
Polarized Radiation Diagnostics for Measuring the Magnetic Field of the Outer Solar Atmosphere
The basic idea of optical pumping, for which Alfred Kastler received the 1966 Nobel Prize in physics, is that the absorption and scattering of light that is...
Polarized Radiative Transfer: from Solar Applications to Laboratory Experiments
The theory of radiative transfer for polarized radiation, developed from Quantum Electrodynamics for the interpretation of solar observations, predicts the...
POLIS: A spectropolarimeter for the VTT and for GREGOR
The polarimetric Littrow Spectrograph POLIS is designed for vector polarimetry at high angular and spectral resolution. It measures the magnetic field...
PolStar - An Explorer-Class FUV Spectropolarimetry Mission to Map the Environments of Massive Stars
PolStar is an Explorer-class far ultraviolet (FUV) spectropolarimetry mission designed to target massive stars and their environments. PolStar will take...