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Stellar and Solar Physics

Our team aims at providing answers to some key questions of solar and stellar physics, such as the heating process of the corona or the structure of solar and stellar interiors. The magnetic field playing a fundamental role in structuring the atmospheres of solar-type stars, it becomes possible to understand the coupling between the internal generation of magnetic field and its external signatures. The two major research topics are thus the dynamic and internal structure of the Sun and stars, and diagnostic and heating of the outer layers.


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Dernières news

4 years 2 months ago

The Sun is currently in a quiet phase ; the next activity peak is is expected to happen in about five years, but in any event, a big solar-storm can strike anytime, not just at the peak of the solar cycle. Scientists and representatives of industrial sectors affected by space weather met at the Met Office to discuss how the solar-flare forecasting system FLARECAST should be designed to best serve user needs.

4 years 7 months ago

The CoRoT team has released all the data produced by the mission. This is the result of several years of work, during which the team managed to interpret and filter the main artifacts produced by the instrument and the satellite, leaving a clean astrophysical signal, relevant for scientific analysis.

4 years 11 months ago

Monday, May 9, 2016, from 1:12 p.m. to 8:40 p.m. (local time), Mercury will transit in front of the Sun. It is a relatively rare event, especially if visible in its entirety, from beginning to end. The next transit of Mercury will take place in 2019, and the next to be visible in France in full will be held in 2039.


The IAS hosts on that occasion observations and presentations for laboratory staff, and the Orsay/Gif campus personnel.


From 1pm to 6pm :

5 years 6 months ago

The CLASP instrument (Chromospheric Lyman Alpha Spectropolarimeter) was successfully launched by a sounding rocket on September 3, 2015 at 17H UT from White Sands Missile Range in New Mexico. The suborbital flight was nominal. The instrument went nominally through its observing program and the data quality is superb.

6 years 1 month ago

A partial solar eclipse will be visible from Orsay, between 9:21am to 11:30am. At maximum at 10:28, about 80% of the Sun will be eclipsed.

Many researchers from IAS will be present in schools. An observation will be possible at IAS with special eclipse sunglasses, with comments from astrophysicists Frédéric Baudin and Clara Froment.