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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The use of the power density for identifying reconnection regions
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The use of the power density for identifying reconnection regions

机译：使用确定的功率密度重新连接区域

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In the vicinity of magnetic reconnection, magnetic energy is transferred into kinetic energy. A reconnection region hence corresponds to a load, and it should manifest itself as large and positive values of the power density, E ? J ? 0, where E is the electric field and J the current density. In this article we analyze Cluster plasma sheet data from 2001–2004 to investigate the use of the power density for identifying possible magnetic reconnection events from large sets of observed data. From theoretical arguments we show that an event with E ? J ?20 pW/m~3 in the Earth's magnetotail observed by the Cluster instruments (X < ?10R_E and |Y| ? 10R_E) is likely to be associated with reconnection. The power density can be used as a primary indicator of potential reconnection regions, but selected events must be reviewed separately to confirm any possible reconnection signatures by looking for other signatures such as Hall electric and magnetic fields and reconnection jets. The power density can be computed from multispacecraft data, and we argue that the power density can be used as a tool for identifying possible reconnection events from large sets of data, e.g., from the Cluster and the Magnetospheric Multiscale missions.
机译：磁重联,附近的磁场能量转换成动能。重新连接地区因此对应于一个负载,它应该体现和一样大正的功率密度值,E ?在电场和J当前吗密度。从2001 - 2004年调查等离子表数据使用确定的功率密度可能的事件从大型磁场重联的观测数据集。我们表明,与E事件?地球的磁尾观察到集群仪器(X < 10 r_e和Y | | ?可能会重新连接。功率密度可以作为一个主要指标潜在的重新连接区域,但选择事件必须单独进行确认通过寻找可能的重新连接签名如霍尔电和其他签名磁场和重新连接飞机。从multispacecraft密度可以计算数据,我们认为,功率密度作为一种工具用于识别成为可能重新连接事件从大型数据集中,例如,从集群和磁性层的多尺度的任务。

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