Supergranulation velocity field from the MDI (SOHO) data

被引：0
|
作者：
L. D. Parfinenko
V. I. Efremov
A. A. Solov’ev
机构：
[1] Russian Academy of Sciences,Main (Pulkovo) Astronomical Observatory
来源：
Geomagnetism and Aeronomy | 2014年 / 54卷
关键词：
Radial Velocity; Oscillation Power; Quiet Photosphere; Supergranulation Cell; Full Solar Disk;
D O I：
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中图分类号：
学科分类号：
摘要：
Long (up to 100 hours) time series of SOHO/MDI Doppler data are analyzed. The power spectrum of radial velocity time series in the quiet photosphere is observed to have, along with the known 5-min mode, a stable strong mode with a period of about 32 h, which is close to the supergranulation cell lifetime. The spatial distribution of the amplitudes of these oscillations also coincides with the characteristic size scale of supergranulation (∼35 Mm).
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页码：1026 / 1031
页数：5
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