Active Region Dynamics
Active Region Dynamics
复制标题
活动区域动态
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
T. Duvall
中科院分区：
文献类型：
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作者：
A. Kosovichev;T. Duvall
局部日震学的新方法和来自太阳和日光层天文台（SOHO）的不间断太阳振荡时间序列数据，使我们对次表层活动区域的结构和动力学的理解取得了重大进展。初步结果表明，大的活跃区是由内部深处反复出现的磁通量形成的，其根部深度至少为50mm。活动区改变了上层对流区的温度结构和流动动力学，形成了辐合流的大环流单体。日震观测还表明，磁能释放、耀斑和日冕物质抛射等过程可能与地表以下4-6 Mm处强烈（1-2 km/s）的剪切流有关。
New methods of local helioseismology and uninterrupted time series of solar oscillation data from the Solar and Heliospheric Observatory (SOHO) have led to a major advance in our understanding of the structure and dynamics of active regions in the subsurface layers. The initial results show that large active regions are formed by repeated magnetic flux emergence from the deep interior, and that their roots are at least 50 Mm deep. The active regions change the temperature structure and flow dynamics of the upper convection zone, forming large circulation cells of converging flows. The helioseismic observations also indicate that the processes of magnetic energy release, flares and coronal mass ejections, might be associated with strong (1–2 km/s) shearing flows, 4–6 Mm below the surface.