Solar Orbiter

May 11, 2023

Could the GRB221009A burst of October 9, 2022 be the most violent starburst of our millennium?

On October 9, 2022, at 13:16 and 59.99 seconds, a gamma-ray burst (GRB) dazzled almost all the X-ray and gamma ray detectors available at the time. Since their discovery, multi-wavelength telescopes in space and on the ground have continuously monitored these events. This outburst, named GRB221009A, shook the world community of astrophysicists, who have since been analysing it to understand the physical phenomena that triggered this most intense burst of energy in our history.

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Sep 15, 2022

Solar Orbiter confirms the existence of magnetic folds ejected by our Sun

As part of the Solar Orbiter science support activities and in conjunction with the ERC Synergy WholeSun grant, researchers from CEA Paris-Saclay, together with an international collaboration, have developed advanced numerical simulations to study the formation of structures of the solar wind. These simulations allow studying the interaction of the convection at the solar surface with the magnetic field. They reveal the appearance of twisted magnetic structures that can participate in the creation of switchbacks.

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Solar Orbiter confirms the existence of magnetic folds ejected by our Sun

Mar 26, 2022

X-ray imaging of a solar flare with the Solar Orbiter STIX instrument and new simulations of the Sun

The Solar Orbiter mission, launched on February 10, 2020 from Cape Canaveral has already traveled more than 2 billion km. Since its passage just 470 km above the Earth in November 2021, the science mission has officially begun. On March 26, 2022, Solar Orbiter passed within 0.32 astronomical units of our star (about 1/3 the distance from Earth to the Sun) for its fourth perihelion (the point in its orbit where Solar Orbiter is closest to the Sun) at a speed of 198,000 km/h.

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Feb 28, 2021

The 2021 MERAC Prize for the Best Early Career to Antoine Strugarek (DAp-CEA)

An European prize for ground-breaking contributions in stellar astrophysics

The 2021 MERAC Prize for the Best Early Career Researcher in Theoretical Astrophysics is awarded to Dr Antoine Strugarek (CEA Saclay, France) for ground- breaking contributions in stellar astrophysics, including dynamo theory, predictions of solar flares and pioneering work on star-exoplanet interactions. The prize from the MERAC foundation (Mobilization for European Research in Astrophysics and Cosmology) is awarded each year by the European Society of Astronomy (ESA).

The 2021 MERAC Prize for the Best Early Career to Antoine Strugarek (DAp-CEA)

Jul 13, 2017

The origin of the solar cycle unveiled

The secret of the star magnetic cycles

Thanks to new numerical simulations, a scientific team led by researchers from the Astrophysics Department-Laboratory AIM of CEA-Irfu has succeeded in explaining why the magnetic field of the Sun reverses every 11 years. Scientists have highlighted the existence of a strong feedback between the star magnetic field and its internal rotation profile, with temporal modulations that ultimately determine the period of the cycle.

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Division of Electronics, Detectors and Computing for Physics (DEDIP)

Institute of Research into the Fundamental Laws of the Universe