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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

3 months 1 week ago

How many earth-like planets orbit the habitable zone of solar-like stars? How planets form and evolve in their planetary systems? What about the interaction with their stars? These are among the questions the ESA PLATO mission is called to answer, through exquisite measurements of exoPLAnet Transits and Oscillations of stars (you now know the origin of the PLATO acronym). The “transit” measurements yield information on the size of the planets, while the “stellar oscillations” give us the mass and age of the stars, which in turn are fundamental to assess the mass and age of the hosted planets. The exquisite quality of all such measurements is secured by 26 ultra large field-of-view cameras that make the eyes of the PLATO mission.

6 months 2 weeks ago

During 2023, IAS was able to test 3 Flight cameras (PFM, FM4, FM5) at the Calibration Station. The last camera was finished testing in the second week of December. All of the tests of these cameras took a little over 6 months, during which thermal vacuum tests were carried out as well as scientific performance tests. A team of about twenty people from IAS and the Station worked to enable these tests. Congratulations to all for this major achievement!

9 months 3 weeks ago

A last minute modification of the EUI (Extreme Utraviolet Imager) instrument on board the Solar Orbiter mission provides new views of our star's corona. The corona is a very tenuous medium and dedicated telescopes called coronagraphs are needed to observe it. FSI (Full Sun Imager), the wide angle channel of EUI, is the first coronagraph imaging in the extreme UV.

1 year 7 months ago

The EUI (Extreme Ultraviolet Imager) instrument on board the Solar Orbiter mission keeps on revealing new types of phenomena in the solar atmosphere. Last in date, an event nicknamed ‘the snake’ features the propagation of a bright front at 170 km/s along a twisted structure know as a ‘filament’, a tube of cool plasma maintained above the surface in the hot corona by the magnetic field.

1 year 11 months ago

The PLATO project has reached a new decisive stage in the development of the calibration structure for the cameras intended for flight at IAS. The first EM (Engineering Model) camera to be calibrated by the three Test Houses of the PLATO consortium has just arrived at the IAS. This measurement campaign will allow the three production sites to be validated with the same functional camera, which is a prerequisite for being authorised to host all the flight cameras.