NEAR-TAIL RECONNECTION AS THE CAUSE OF COMETARY TAIL DISCONNECTIONS
NEAR-TAIL RECONNECTION AS THE CAUSE OF COMETARY TAIL DISCONNECTIONS
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DOI：
10.1029/ja091ia02p01417
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发表时间：
1986-02-01
影响因子：
2.8
通讯作者：
FEDDER, JA
中科院分区：
文献类型：
--
作者：
RUSSELL, CT;SAUNDERS, MA;FEDDER, JA
在彗星尾部分离事件中，等离子体尾部似乎从彗发中分离出来，并加速离开彗发，这时一个新的尾部开始形成。我们提出，这些断开产生的方式类似于地磁亚暴，即，通过在近尾形成强重连区域，在彗发中形成磁岛，并通过加强尾内的磁“弹弓”来激发等离子体尾。这种重连过程可能由几种不同的过程触发，例如行星际激波或阿尔芬马赫数的变化。
In a cometary tail disconnection event the plasma tail appears to separate from the coma and to accelerate away from it. As this occurs a new tail begins to form. We propose that these disconnections arise in a manner analogous to geomagnetic substorms, i.e., by the formation of a strongly reconnecting region in the near tail that forms a magnetic island in the coma and ejects the plasma tail by strengthening the magnetic “slingshot” within the tail. This reconnection process may be triggered by several different processes, such as interplanetary shocks or variations in the Alfven Mach number.