COLLISIONLES INTERACTIONS: MAGNETOPAUSE COMMUNICATES WITH BOW SHOCK?

Authors

S. Savin Space Research Institute RAS
G. Pallocchia INAF-Istituto di Astrofisica e Planetologia Spaziali
C. Wang National Space Science Center, Chinese Academy of Sciences
L. Legen Space Research Institute RAS

DOI:

https://doi.org/10.29006/1564-2291.JOR-2019.47(1).34

Abstract

Our analysis of a sunward Poynting flux throughout magnetosheath and foreshock (directly measured byINTERBALL-1, CLUSTER-4 and DOUBLE STAR TC1), for the first time clearly demonstrates, how the resonances in the magnetospheric boundary layers are transmitted back wards the bow shock: the short pulses of the sunward Poynting flux initiate the strongest (>80%!) 3-wave interactions with the incident dynamic pressure. They start in the foreshock, regulate the bow shock position and oscillations, and then another near- magnetopause 3-wave strong interactions assist plasma flow extra deflections and acceleration downstream the magnetopause.