Continuum emission enhancements and penumbral changes observed during flares by IRIS, ROSA, and Hinode
In this paper we describe observations acquired by satellite instruments ( Hinode/SOT and IRIS) and ground-based telescopes (ROSA@DST) during two consecutive C7.0 and X1.6 flares occurred in active region NOAA 12205 on 2014 November 7. The analysis of these data show the presence of continuum enhancements during the evolution of the events, observed both in ROSA images and in IRIS spectra. Moreover, we analyze the role played by the evolution of the δ sunspots of the active region in the flare triggering, indicating the disappearance of a large portion of penumbra around these sunspots.
Nuovo Cimento C Geophysics Space Physics C
- Pub Date:
- January 2019
- Astrophysics - Solar and Stellar Astrophysics
- 3 pages, 2 figures, to be published in "Nuovo Cimento C" as proceeding of the Third Meeting of the Italian Solar and Heliospheric Community