The strongest He II emission in the visible spectral range, at 4686 A, is for the first time observed at a spectral resolution sufficiently high for a line...
TalkHelium Emissions as a Probe for Plasma Temperatures.
TalkMorphological And Thermal Properties Of The Solar Corona : Diagnostic Tools & Applications
Progress in our understanding of the Solar corona and its underlying heating and acceleration processes, depends critically on our ability to measure...
PublicationA summary of solar 1-8A measurements from the SMS and GOES satellites, 1977-1981
The 1-8A band of synodic full-disc solar X-rays (1-8A) W/m(2) were measured nearly continuously from 1975 to 1981 aboard the SMS-1, SMS-2, GOES-1, GOES-2, and...
PublicationAn example of the cancellation of magnetic fields during the decay of an active region
A case of cancellation of magnetic fields is observed during the decay of a small active region. Three different sources of information were simultaneously used...
PublicationFast-to-Alfvén Mode Conversion and Ambipolar Heating in Structured Media. II. Numerical Simulation
This paper studies the effectiveness of production of Alfvén waves in the solar atmosphere through the processes of mode conversion, taking into account several...
TalkFlares: highly energetic explosions on the Sun
Flares are among the most energetic magnetic solar phenomena. They are often accompanied by ejections of charged particles, which have a direct influence on the...
NewsJEFFREY R. KUHN: “In our lifetime we are going to wake up some morning to the news that we have discovered life”
The Sun is not the live coal that Anaxagoras described. We can imagine hell in its interior, and we know that there are darker spots on its surface which, when...
PublicationLa mission SoHO vers un nouveau Soleil?
PublicationLarge-amplitude Prominence Oscillations following Impact by a Coronal Jet
Observational evidence shows that coronal jets can hit prominences and set them in motion. The impact leads to large-amplitude oscillations (LAOs) in the...