Počet záznamů: 1
A new type of small-scale downflow patches in sunspot penumbrae
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SYSNO ASEP 0350115 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A new type of small-scale downflow patches in sunspot penumbrae Tvůrce(i) Katsukawa, Y. (JP)
Jurčák, Jan (ASU-R) RID, ORCIDCelkový počet autorů 2 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 524, December (2010), A20/1-A20/9Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Sun ; photosphere ; surface magnetism ; sunspots ; chromosphere Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika CEP IAA300030808 GA AV ČR - Akademie věd CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000284625300018 DOI 10.1051/0004-6361/200913898 Anotace 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. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2011
Počet záznamů: 1