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- Forbes T. G.
- Institute for the Study of Earth, Oceans, and Space, University of New Hampshire
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- nature of Petschek type reconnection
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説明
It is not always appreciated that Petschek's reconnection mechanism is a particular solution of the MHD equations which applies only when special conditions are met. Specifically, it requires that the flow into the reconnection region be set up spontaneously without external forcing. This condition is satisfied when reconnection in a simple current sheet is initiated by enhancing the resistivity in a localized region. Such a process disrupts the current sheet and launches slow-mode waves which steepen into nearly switch-off shocks of the type predicted by Petschek. As these shocks propagate outwards, the current sheet reforms at the original point of the disturbance, and a quasisteady Petschek-like configuration is set up. Syrovatskii-like configurations which force reconnection by driving a flow toward an initially current-free, orthogonal x-point are less likely to satisfy the conditions required for Petschek-type reconnection.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 53 (6), 423-429, 2001
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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- CRID
- 1390001206512691840
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- NII論文ID
- 10007639305
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 5859104
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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