Počet záznamů: 1
Horizontal flow fields in and around a small active region The transition period between flux emergence and decay
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SYSNO ASEP 0488883 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Horizontal flow fields in and around a small active region The transition period between flux emergence and decay Tvůrce(i) Verma, M. (GB)
Denker, C. (DE)
Balthasar, H. (DE)
Kuckein, C. (DE)
Gonzalez Manrique, S. J. (DE)
Sobotka, Michal (ASU-R) RID, ORCID
Gonzalez, N.B. (DE)
Hoch, S. (DE)
Diercke, A. (DE)
Kummerow, P. (DE)
Berkefeld, T. (DE)
Collados Vera, M. (ES)
Feller, A. (DE)
Hofmann, A. (DE)
Kneer, F. (DE)
Lagg, A. (DE)
Löhner-Böttcher, J. (DE)
Nicklas, H. (DE)
Pastor Yabar, A. (ES)
Schlichenmaier, R. (DE)
Schmidt, D. (DE)
Schmidt, W. (DE)
Schubert, M. (DE)
Sigwarth, M. (DE)
Solanki, S.K. (DE)
Soltau, D. (DE)
Staude, J. (DE)
Strassmeier, K.G. (DE)
Volkmer, R. (DE)
von der Lühe, O. (DE)
Waldmann, T.A. (DE)Celkový počet autorů 31 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 596, December (2016), A3/1-A3/12Poč.str. 12 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Sun ; photosphere ; magnetic fields Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP 7E13003 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy UT WOS 000390797900035 EID SCOPUS 84999810244 DOI 10.1051/0004-6361/201628380 Anotace Combining high-resolution and synoptic observations aims to provide a comprehensive description of flux emergence at photospheric level and of the growth process that eventually leads to a mature active region. The computed growth rates for photometric area, magnetic area, and magnetic flux are about twice as high as the respective decay rates. The space-time diagram using HMI magnetograms of five days provides a comprehensive view of growth and decay. It traces a leaf-like structure, which is determined by the initial separation of the two polarities, a rapid expansion phase, a time when the spread stalls, and a period when the region slowly shrinks again. The separation rate of 0.26 km s(-1) is highest in the initial stage, and it decreases when the separation comes to a halt. Horizontal plasma velocities computed at four evolutionary stages indicate a changing pattern of inflows. In LCT maps we find persistent flow patterns such as outward motions in the outer part of the two major pores, a diverging feature near the trailing pore marking the site of upwelling plasma and flux emergence, and low velocities in the interior of dark pores. We detected many elongated rapidly expanding granules between the two major polarities, with dimensions twice as large as the normal granules.
Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2018
Počet záznamů: 1