Dynamic response of the solar corona to heating driven by photospheric motions

日冕对光球运动驱动的加热的动态响应

• 批准号: 57710050
• 负责人: Professor Dr. Hardi Peter
• 金额: --
• 依托单位: Max-Planck-Institut für Sonnensystemforschung (MPS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/57710050?language=en
• 关键词: Dynamic; response; solar; corona; heating

Cool stars are surrounded by hot coronae which are heated to some million degrees Kelvin. The heating processes, widely proposed to be related to the stellar magnetic field, lead not only to temperatures in the outer atmosphere well in excess of the stellar surface, but result also in a highly dynamic response of the plasma, inducing flows and waves. To study these processes the Sun is of pivotal interest because here we can spatially resolve individual structures in the corona.In this proposal we will utilize new 3D MHD numerical simulations in combination with new observations of unprecedented quality to investigate the dynamic response of the corona to the heating process. The Extreme ultraviolet Imaging Spectrometer on the new Hinode space observatory provides large spatial maps of emission line profiles with high time cadence, which will allow for the first time to study e.g. the Doppler shift fluctuations of a large part of an active region. This will provide a new test for the 3D MHD models of the corona which became available only in recent years. These 3D models together with the new observations will also open possibilities for investigations of coronal seismology, and help to infer the physical parameters in various structures found in the solar corona.

冷的恒星被加热到几百万开氏度的热日冕所包围。被广泛认为与恒星磁场有关的加热过程不仅导致外层大气的温度远远超过恒星表面，而且还导致等离子体的高度动态响应，引起流动和波。为了研究这些过程，太阳是关键的兴趣，因为在这里，我们可以在空间上解决在corona.In这个建议，我们将利用新的三维MHD数值模拟结合前所未有的质量新的观测，调查的动态响应的日冕加热过程中的个人结构。新的Hinode空间天文台上的极紫外成像光谱仪提供了时间节奏很高的发射线剖面的大型空间图，这将首次允许研究活动区域大部分的多普勒频移波动等。这将为近几年才出现的日冕3D MHD模型提供新的测试。这些3D模型与新的观测结果一起也将为日冕地震学的研究开辟可能性，并有助于推断日冕中发现的各种结构的物理参数。