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Scientists using data from the GOLF instrument onboard the ESA/NASA SOHO solar observatory have found long-sought gravity modes of seismic vibration that imply the Sun's core is rotating four times faster than its surface. IAS is Principal Investigator of the GOLF instrument and has participated to this study.
PLATO - Planetary Transits and Oscillations of stars - was adopted during a meeting of ESA’s Science Programme Committee held on June 20, 2017. This means that the mission can now move from the blueprint to construction stage. In the coming months industry will be asked to bid to supply the spacecraft platform.
For the first time, scientists have explored the magnetic field in the upper solar atmosphere by observing the polarization of ultraviolet light from the Sun. They accomplished this by analyzing data taken by the CLASP sounding rocket experiment during its 5-minute flight in space on September 3, 2015. Now that ultraviolet spectropolarimetry, the method used in the CLASP project, has been proven to work, it can be used in future investigations of the magnetic fields in the upper chromosphere and the transition region to better understand activity in the solar atmosphere.
Monday, April 10, at the headquarters of JAXA (the Japanese space agency) in Tokyo, J-Y. Le Gall, President of CNES and N. Okumura, his counterpart at JAXA, signed a scientific and technical cooperation agreement for the MMX exploration mission to Phobos and Deimos, the two moons of Mars. The primary objective of this mission, which is scheduled for launch in 2024, is to characterise the properties and composition of these two objects in order to determine whether they are derived from asteroids in the outer belt (the carriers of volatiles: water and carbon compounds), or objects re-accreted after a giant impact with Mars, as per the origin of the Earth's Moon.
A multidisciplinary team involving researchers from IAS, IPNO, ISMO, and CSNSM in Orsay, and GSI in Darmstadt (Germany) has characterized in the laboratory the effects of heavy cosmic rays on the structural change and sputtering of small carbonaceous species released when cosmic rays, simulated and accelerated at the GSI accelerator, hit a carbonaceous interstellar dust grain analogue. The measurements performed during such simulations allow knowing the processes induced by radiations observed in space and their relative importance. The objective of these studies is to provide data on the evolution of the interstellar material, to understand its further evolution and provide constraints for modelers of astrophysical environments.
