First identification of mirror mode waves in Venus' magnetosheath?

摘要: [1] In this paper first time observations of mirror mode like structures in Venus' magnetosheath are presented. Using magnetometer data from the Venus Express spacecraft it is shown that two regions Venusian strong compressional waves exist, which propagate nearly perpendicular to ambient magnetic field. They most likely mirror-mode waves. The have periods between 5 and 15 sec, depending on location magnetosheath. These show up just behind quasi-perpendicular bow shock, near magnetopause during compression due increased solar wind pressure. characteristics similar found Earth's magnetosheath, however, they down-scaled duration frequency by a factor 10, comparable with difference size