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A new type of small-scale downflow patches in sunspot penumbrae

SYSNO ASEP	0350115
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	A new type of small-scale downflow patches in sunspot penumbrae
Author(s)	Katsukawa, Y. (JP) Jurčák, Jan (ASU-R)_{RID, ORCID}
Number of authors	2
Source Title	Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361 Roč. 524, December (2010), A20/1-A20/9
Number of pages	9 s.
Language	eng - English
Country	FR - France
Keywords	Sun ; photosphere ; surface magnetism ; sunspots ; chromosphere
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	000284625300018
DOI	10.1051/0004-6361/200913898
Annotation	Using the Hinode spectro-polarimetric observations of Fe I 630 nm lines and their inversions, we found photospheric downflows in the sunspot penumbra that have the same magnetic polarity as the sunspot umbra. The Stokes profiles seen in the patches are characterized as humps or enhancements on the red wing of the Stokes V profiles. Probably owing to the small size, such downflow patches have not been previously reported in penumbrae. These downflows are not related to the Evershed flow. They are mostly found inside the bright penumbral filaments and in the disk-center side penumbra in our data. We also found that some of the downflow patches are temporally and spatially coincident with chromospheric brightenings in the Ca II H images.
Workplace	Astronomical Institute
Contact	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Year of Publishing	2011

Number of the records: 1