Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-04-05
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
5 pages, 5 figures. To appear in Proceedings of the 25th NSO Workshop: Chromospheric Structure and Dynamics
Scientific paper
The solar chromosphere is a vigorously dynamic region of the sun, where waves and magnetic fields play an important role. To improve chromospheric diagnostics, we present new observations in Ca II 8542 carried out with the SST/CRISP on La Palma, working in full-Stokes mode. We measured Stokes line profiles in active regions. The line profiles observed close to the solar limb show signals in all four Stokes parameters, while profiles observed close to disk center only show signals above the noise level in Stokes I and V. We used the LTE inversion code 'NICOLE' to derive atmospheric parameters in umbral flashes present in a small round sunspot without penumbra.
Cruz Rodríguez Jaime de la
der Voort Luc Rouppe van
Socas-Navarro Hector
van Noort Michiel
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