Oscillations of sunspot magnetic fields

被引：0
|
作者：
Ruedi, I [1 ]
Solanki, SK
Stenflo, JO
Tarbell, T
Scherrer, PH
机构：
[1] ETH Zentrum, Inst Astron, CH-8092 Zurich, Switzerland
[2] Lockheed Martin Res Lab, Dept H1 12, Palo Alto, CA 94304 USA
[3] Stanford Univ, Ctr Space Sci & Astrophys, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA
来源：
ASTRONOMY & ASTROPHYSICS | 1998年 / 335卷 / 03期
关键词：
Sun : activity; magnetic fields; oscillations; photosphere; sunspots;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on velocity and magnetic field oscillations observed in sunspots using the MDI instrument onboard SOHO. In addition to the well-known velocity oscillations, the data clearly show highly localised oscillations of the magnetogram signal in different parts of the sunspots. We show that only oscillations of the magnetic field vector can produce the observed magnetogram oscillations, and that the observed phase relations suggest an origin in terms of magnetoacoustic gravity waves.
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页码：L97 / L100
页数：4
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