Synchronism of long-period oscillations of the magnetic field in sunspots

被引：5
|
作者：
Efremov, V. I. [1 ]
Parfinenko, L. D. [1 ]
Solov'ev, A. A. [1 ]
机构：
[1] Russian Acad Sci, Cent Pulkovo Astron Observ, St Petersburg, Russia
来源：
GEOMAGNETISM AND AERONOMY | 2012年 / 52卷 / 08期
关键词：
Magnetic Field; Radial Velocity; Period Oscillation; Convective Zone; Bipolar Group;
D O I：
10.1134/S0016793212080087
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
It is shown that long-period (T = 10-20 h) oscillations of the magnetic field in sunspots, combined in bipolar groups, are excited synchronously in the main and tail spots of a group. At the same time, there is no correlation between long-period oscillations of the field of sunspots which are in different active regions, i.e., spaced sunspots oscillate independently. This fact eliminates the question about the apparatus nature of the oscillations of interest (if there is an artifact, oscillations of all sunspots on the visible solar hemisphere would be synchronous!). High-resolution (0.5 angular seconds per pixel) MDI(SOHO) data show a high correlation between long-period oscillations of the magnetic field at isolated points of the sunspot shadow. This points to the fact that the sunspot shadow participates in long-period oscillations as a quite integral physical formation.
引用
收藏
页码：1055 / 1061
页数：7
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