Advisors

Duvall, Thomas
Thomas Duvall
Scientist
Phone: +49 551 384 979-435
Gizon, Laurent
Laurent Gizon
Director
Phone: +49 551 384 979-439
+49 551 384 979-299
+ 49 551 384 979-255
Links: Homepage

Open PhD Project

Sunspot Seismology

Recently a new method has been developed to study the subsurface structure of sunspots, called 2-skip time-distance helioseismology (see Figure).  Theoretically this is a useful method as it can separate thermal effects from magnetic effects. Observationally large signals are observed, as much as three minutes of travel time difference from a similar quiet-sun area. Significant signals from the outflows around the spot are also observed. What is needed are significant modeling efforts to show us what these observations really mean.

Radiative magnetohydrodynamic simulation of a sunspot by Rempel et al 2009. Zoom Image
Radiative magnetohydrodynamic simulation of a sunspot by Rempel et al 2009.
 
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