Photospheric surface flows and sunspot moats

被引：0
|
作者：
Hagenaar, M [1 ]
机构：
[1] Org ADBS, Lockheed Martin Adv Technol Ctr, Palo Alto, CA 94304 USA
来源：
Large-Scale Structures and their Role in Solar Activity | 2005年 / 346卷
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Time slices in K line observations of a sunspot using the SVST. on 1994/06/14 show an obvious outward velocity flow and time slices in magnetograms show some bipolar outflowing structures. Moat, flows surrounding sunspots are not simply radial but show an azimuthal "spoke" structure of 10" to 20", persisting for several hours. A flow map determined by local correlation tracking shows paths of convergence, also followed by bright points. Convective rolls may be the explanation of the spoke like structures. Average RMS maps of MDI HR, magnetograms of sunspots oil 2001/06/19 and 2003/04/09 also show spoke structures of 15"-20".
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页码：41 / 46
页数：6
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