Wave Mode Occurrence Distribution Around Venus: A VEX Statistical Study

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Brazilian Journal of Physics Pub Date : 2025-03-01 DOI:10.1007/s13538-025-01723-y

Adriane Marques de Souza Franco, Isabela de Oliveira, Markus Fraenz, Ezequiel Echer, Mauricio José Alves Bolzan, João Carlos de Moura Castro Neto

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Abstract

In this work, plasma and magnetic field data from Venus Express (VEX) were analyzed through the entire mission span (2006-2014) in order to statistically study wave mode occurrence around Venus considering different solar wind conditions. The wave mode occurrence distribution in terms of solar activity (maxima and minimum periods), solar wind pressure, and interplanetary magnetic field (IMF) east-west component orientation (\(B_{y}>0\) and \(B_{y}<0\)) were computed. Our results reveal that mirror mode occurrence does not seems to be affected by changes in the analyzed parameters. The most significant influence was observed in the Alfvén mode by the solar wind dynamic pressure, which has its occurrence rate clearly increased, during periods of high solar wind dynamic pressure. The fast mode seems to be influenced by the three analyzed parameters and tends to occur more often during periods of positive IMF \(B_{y}\) and high solar activity. Further, a higher occurrence of fast wave mode during enhanced dynamic pressure was observed, which may be related to KH instability.

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来源期刊

Brazilian Journal of Physics 物理-物理：综合

CiteScore

2.50

自引率

6.20%

发文量

189

审稿时长

6.0 months

期刊介绍： The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.