Do There Exist Energy Closures to the Observed Mirror Waves?

L. N. Hau, C. K. Chang, B. J. Wang

研究成果: 雜誌貢獻期刊論文同行評審

2 引文 斯高帕斯(Scopus)

摘要

Low-frequency mirror waves are frequently observed in the planetary magnetosheaths for the plasma conditions of (Formula presented.) and (Formula presented.). This study first shows that the thermodynamic conditions of the observed mirror events may well be described by a set of double-polytropic (DP) laws first proposed by Hau and Sonnerup (1993, https://doi.org/10.1029/93gl01706), (Formula presented.) and (Formula presented.), with the polytropic values being in the ranges of (Formula presented.) and (Formula presented.). The physical basis of the empirical thermodynamic relations is then examined based on the mixed Vlasov-MHD formulation for low-frequency linear mirror instability (Ferrière & Andre, 2002, https://doi.org/10.1029/2002JA009273) which shows that the theoretical energy equations possess the DP forms with (Formula presented.) and (Formula presented.) being functions of (Formula presented.); in particular, for mirror unstable cases (Formula presented.) and (Formula presented.). The theoretical predictions are found to be in high agreements with the empirical polytropic values with the average errors of ∼6.5%.

原文???core.languages.en_GB???
文章編號e2021GL095483
期刊Geophysical Research Letters
48
發行號23
DOIs
出版狀態已出版 - 16 12月 2021

指紋

深入研究「Do There Exist Energy Closures to the Observed Mirror Waves?」主題。共同形成了獨特的指紋。

引用此