Number of the records: 1
Temporal downflows in a penumbra
- 1.
SYSNO ASEP 0350125 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Temporal downflows in a penumbra Author(s) Jurčák, Jan (ASU-R) RID, ORCID
Katsukawa, Y. (JP)Number of authors 2 Source Title Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 524, December (2010), A21/1-A21/8Number of pages 8 s. Language eng - English Country FR - France Keywords Sun ; chromosphere ; sunspots ; polarimetric ; photosphere Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics R&D Projects IAA300030808 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000284625300032 DOI 10.1051/0004-6361/201014722 Annotation Following the discovery of penumbral downflows of the same polarity as the sunspot umbra, we use the Hinode spectropolarimetric data that allow us to study the temporal behavior of these structures. The repetitive scan of a narrow penumbral region with one minute cadence is used. We identified 181 downflows with lifetimes mostly around two or three minutes. About 20% of the downflows is related to the chromospheric brightenings. The downflows are also related to the disappearance of nearby upflow regions. This relation is dependent on the lifetime of the downflows with maximum of 60% for those lasting for 6 minutes. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2011
Number of the records: 1