Local Helioseismology: Three-Dimensional Imaging of the Solar Interior

被引:152
作者
Gizon, Laurent [1 ]
Birch, Aaron C. [2 ]
Spruit, Henk C. [3 ]
机构
[1] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany
[2] NW Res Associates Inc, Colorado Res Associates Div, Boulder, CO 80301 USA
[3] Max Planck Inst Astrophys, D-85748 Garching, Germany
来源
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 48 | 2010年 / 48卷
关键词
solar convection; solar cycle; solar magnetism; solar oscillations; sunspots; TIME-DISTANCE HELIOSEISMOLOGY; RING-DIAGRAM ANALYSIS; OSCILLATION NETWORK GROUP; FREQUENCY TRAVEL-TIMES; MAGNETIC-FIELD; P-MODES; TORSIONAL OSCILLATIONS; ACTIVE REGIONS; NEAR-SURFACE; FAR-SIDE;
D O I
10.1146/annurev-astro-082708-101722
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Sun supports a rich spectrum of internal waves that are continuously excited by turbulent convection. The Global Oscillation Network Group (GONG) network and the SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) space instrument provide an exceptional database of spatially resolved observations of solar oscillations, covering more than an entire sunspot cycle (11 years). Local helioseismology is a set of tools for probing the solar interior in three dimensions using measurements of wave travel times and local mode frequencies. Local helioseismology has discovered (a) near-surface vector flows associated with convection, (b) 250 m s(-1) subsurface horizontal outflows around sunspots, (c) similar to 50 m s(-1) extended horizontal flows around active regions (converging near the surface and diverging below), (d) the effect of the Coriolis force on convective flows and active region flows, (e) the subsurface signature of the 15 m s(-1) poleward meridional flow, (f) a +/-5 m s(-1) time-varying depth-dependent component of the meridional circulation around the mean latitude of activity, and (g) magnetic activity on the farside of the Sun.
引用
收藏
页码:289 / 338
页数:50
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