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GREGOR observations of a small flare above a sunspot
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SYSNO ASEP 0488874 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title GREGOR observations of a small flare above a sunspot Author(s) Sobotka, Michal (ASU-R) RID, ORCID
Dudík, Jaroslav (ASU-R) RID, ORCID
Denker, C. (DE)
Balthasar, H. (DE)
Jurčák, Jan (ASU-R) RID, ORCID
Liu, Wenjuan (ASU-R) ORCIDSource Title Solar and Stellar Flares and their Effects on Planets. - Cambridge : Cambridge University Press, 2016 - ISBN 9781107137578 Pages s. 68-73 Number of pages 6 s. Publication form Print - P Action Symposium of the International Astronomical Union /320./ Event date 11.08.2015 - 14.08.2015 VEvent location Honolulu Country US - United States Event type WRD Language eng - English Country GB - United Kingdom Keywords Sun ; flares ; chromosphere Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) R&D Projects 7E13003 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) DOI 10.1017/S1743921316000211 Annotation A small flare ribbon above a sunspot umbra in active region 12205 was observed on November 7, 2014, at 12:00 UT in the blue imaging channel of the 1.5m GREGOR telescope, using a 0.1 nm Ca II H interference filter. Context observations from SDO/AIA, Hinode/SOT, and IRIS show that the ribbon is a part of a larger one that extends through the neighboring positive polarities and also participates in several other flares within the active region. A 140 second long time series of Ca II H images was reconstructed by means of the Multi-Frame Blind Deconvolution method. Light curves and horizontal velocities of small-scale bright knots in the observed flare ribbon were measured. Two of them move in the opposite direction and exhibit highly correlated intensity changes, providing evidence for the presence of slipping reconnection at small spatial scales.
Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2018
Number of the records: 1