Stuttgart 2012 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 19: Sonne und Heliosphäre II

EP 19.1: Invited Talk

Friday, March 16, 2012, 10:30–11:00, V55.21

Spectropolarimetry of Sunspots using HINODE data — •Morten Franz — Kiepenheuer Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg

Until the present day, it is not fully understood how Sunspots form and why they develop a penumbra. Current penumbral models assume different modes of magneto-convection to explain the penumbral magnetic field topology together with the characteristic Evershed flow. However, these models are still unable to explain all observational features consistently.

In this contribution, I will first summarize recent findings that have been made using data obtained by the HINODE space-borne solar observatory and then focus on how these findings may be used to discriminate between penumbral models. For this purpose, I will concentrate on the small-scale morphology of penumbral plasma flows and the geometry of the magnetic field. To conclude, I will discuss whether these flows are magnetized or not and which of the penumbral models seems favorable in the light of HINODE observations.