Le 15 novembre 2013
À 10h30
Amphithéâtre Grande Coupole
Markus Roth
Kiepenheuer-Institut für Sonnenphysik, Freiburg, Germany
The Sun is subject to sound waves that probe its interior. Observations of these solar oscillations have emerged as a powerful tool to gain information on the processes in the Sun.Through helioseismology detailed inferences of the Sun’s internal structure, rotation and flows can be obtained. In addition helioseismology allows studying sunspots and other magnetic active areas on the Sun which have an important impact on our technological society through the potentially harmful solar eruptions and which may play a significant role in the variations of the Earth’s climate.
However, a complete understanding of the Sun, and in particular of its magnetism, can only be obtained by understanding the internal structure and properties of the stars in general. Asteroseismology offers solving this problem by studying the interiors of the stars.