Solar-Cycle Variation of Subsurface Zonal Flow Derived from Ring-Diagram Analysis

被引：0

作者：

Komm, R. ^{[1
]}

Howe, R. ^{[2
]}

Hernandez, I. Gonzalez ^{[1
]}

Hill, F. ^{[1
]}

Bogart, R. S. ^{[3
]}

Haber, D. ^{[4
]}

机构：

[1] Natl Solar Observ, Tucson, AZ 85719 USA

[2] Univ Birmingham, Birmingham B15 2TT, W Midlands, England

[3] Stanford Univ, HEPL, Stanford, CA 94305 USA

[4] Univ Colorado, JILA, Boulder, CO 80309 USA

来源：

FIFTY YEARS OF SEISMOLOGY OF THE SUN AND STARS | 2013年 / 478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：

We study the solar-cycle variation of the zonal flow in the near-surface layers of the solar convection zone from the surface to a depth of 16 Mm. We have analyzed Global Oscillation Network Group (GONG) and Helioseismic and Magnetic Imager (HMI) Dopplergrams with the ring-diagram analysis covering about 12 years combined. The zonal flow varies with the solar cycle showing faster-than-average flows equatorward of the mean latitude of activity and slower-than-average flows on the poleward side. The bands of fast zonal flow appear at mid-latitudes about two years before magnetic activity of cycle 24 is seen. The poleward branch of this variation is visible as bands of fast zonal flow near 50 degrees latitude in both HMI and GONG data.

引用

页码：217 / +

页数：2

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