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首页> 外文期刊>The Astrophysical journal >Solar Cycle Related Changes At The Base Of The Convection Zone
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Solar Cycle Related Changes At The Base Of The Convection Zone

机译：对流区底部太阳周期相关变化

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The frequencies of solar oscillations are known to change with solar activity. We use principal component analysis to examine these changes with high precision. In addition to the well-documented changes in solar normal mode oscillations with activity as a function of frequency, which originate in the surface layers of the Sun, we find a small but statistically significant change in frequencies with an origin at and below the base of the convection zone. We find that at r = (0.712_(-0.0029)~(+0.0097)) R_☉, the change in sound speed is δc~2/c~2 = (7.23 ± 2.08) × 10~(-5) between high and low activity. This change is very tightly correlated with solar activity. In addition, we use the splitting coefficients to examine the latitudinal structure of these changes. We find changes in sound speed correlated with surface activity for r approx> 0.9 R_☉.
机译：已知太阳振荡的频率随太阳活动而变化。我们使用主成分分析来高精度地检查这些变化。除了有据可查的太阳正模振荡随频率变化而变化的活度随频率变化而起源于太阳表层以外，我们还发现频率的小幅变化但统计上显着，其始发点位于或小于太阳的基数。对流区。我们发现在r =（0.712 _（-0.0029）〜（+0.0097））R_☉时，声速的变化为δc〜2 / c〜2 =（7.23±2.08）×10〜（-5）和低活动。这种变化与太阳活动紧密相关。此外，我们使用分裂系数来检查这些变化的纬度结构。我们发现，当r大约> 0.9R_☉时，与表面活动相关的声速变化。

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