The solar atmosphere is a highly ionized medium which is the playground of magnetic fields. In the deepest layer (the photosphere), magnetic fields disturb the...

The standard physical mechanisms of the continuum emission in the microwave range are the synchrotron, free-free, and/or thermal dust emissions. Nevertheless...

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...

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...

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...

The theory of radiative transfer for polarized radiation, developed from Quantum Electrodynamics for the interpretation of solar observations, predicts the...

Not Available