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» Conférences d’après mars 2011 : nouveau site

2375

Séminaire général du Département de physique

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The Physics of Sunspots
Nigel Weiss (Cambridge, UK)

14 mai 2009

Sunspots are the sites of strong magnetic fields that inhibit heat transport by convection. The intricate fine structure of these magnetic fields has only recently been revealed, by observations from the ground and from space. These observations raise theoretical problems, requiring a revised physical model that can be supported by large-scale computation. The global incidence of sunspots varies with a well-known 11-year cycle but the most recent indications suggest that the amplitude of this cycle is currently declining.

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Nigel Weiss Nigel Weiss (Cambridge, UK)
Emeritus Professor of Mathematical Astrophysics, Fellow of Clare College, FRS.