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首页> 外文期刊>The Astrophysical journal >On The Stability Of Active Regions And Sunspots
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On The Stability Of Active Regions And Sunspots

机译:活跃区域和黑子的稳定性

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摘要

Recent helioseismic measurements of large-scale subsurface flows indicate that systematic horizontal inflows near the photosphere surround many active regions. Such active-region inflows are likely to impede the dispersal of magnetic flux into the surrounding network and thus can influence larger-scale and longer-term patterns and evolution of the surface magnetic field throughout the course of a solar activity cycle. We present results of numerical simulations of compressible magnetoconvection in which an initial unipolar magnetic field undergoes evolution resulting from convectively driven motions. Inflows surrounding regions of concentrated magnetic flux are driven by reducing the surface temperature as a function of local magnetic flux. We find flow patterns that are consistent with observations of those observed around active regions and sunspots.
机译:最近对大型地下流进行的流变测量表明,光球附近的系统水平流围绕着许多活动区域。这种活动区域的流入很可能会阻止磁通向周围网络的扩散,因此会在整个太阳活动周期的过程中影响更大范围和更长期的格局以及表面磁场的演化。我们介绍了可压缩磁对流的数值模拟结果,其中,对流驱动的运动使初始的单极磁场经历了演化。通过降低表面温度作为局部磁通量的函数来驱动集中磁通量周围区域的流入。我们发现与活动区域和黑子周围观察到的流动模式一致的流动模式。

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