Flow around sunspots from p-mode frequency shift measurements

被引：5

作者：

Sun, MT ^{[1
]}

Chou, DY

Lin, CH

机构：

[1] Chang Gung Coll Med & Technol, Dept Mech Engn, Kwei San, Taiwan

[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30043, Taiwan

来源：

SOLAR PHYSICS | 1997年 / 176卷 / 01期

关键词：

D O I：

10.1023/A:1004927811123

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use five-day helioseimic data from the Taiwan Oscillation Network to study the flow around a sunspot, NOAA 7887. The p-mode oscillations in an annular region centered at the sunspot are decomposed into the modes propagating toward and away from the sunspot. We find that the frequency of an outgoing mode is greater than that of the corresponding incoming mode. This indicates that the plasma is flowing outward from the sunspot. The outflow velocity is estimated to be about 40-80 m s(-1).

引用

页码：59 / 65

页数：7

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