{"title":"Ponderomotive Disturbance of the Solar Wind Velocity before the Fronts of Shock Waves","authors":"A. V. Guglielmi, A. S. Potapov, F. Z. Feygin","doi":"10.1134/S0038094624602093","DOIUrl":null,"url":null,"abstract":"<p>The solar wind speed perturbation before the fronts of shock waves is theoretically investigated. It is shown that there is a small, but quite detectable deceleration in front of the Earth’s bow shock in the Earth-bound frame of reference. The perturbation is caused by the ponderomotive Abraham force. The Abraham force results from the excitation of fast magnetosonic waves in the foreshock region. The theoretical estimate of the solar wind deceleration by ~10 km/s agrees with measurements of the directional plasma flow velocity on the spacecraft in the foreshock region of the Earth’s bow shock. The use of the velocity addition theorem for interplanetary foreshocks with a structure similar to Earth’s foreshock allows to predict acceleration rather than deceleration of the solar wind in front of interplanetary shocks in the Earth-bound reference frame. The main conclusion is that the theory of ponderomotive plasma modification is of undoubted interest for the interpretation of in situ measurements in the interplanetary environment.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 5","pages":""},"PeriodicalIF":0.8000,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar System Research","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0038094624602093","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
The solar wind speed perturbation before the fronts of shock waves is theoretically investigated. It is shown that there is a small, but quite detectable deceleration in front of the Earth’s bow shock in the Earth-bound frame of reference. The perturbation is caused by the ponderomotive Abraham force. The Abraham force results from the excitation of fast magnetosonic waves in the foreshock region. The theoretical estimate of the solar wind deceleration by ~10 km/s agrees with measurements of the directional plasma flow velocity on the spacecraft in the foreshock region of the Earth’s bow shock. The use of the velocity addition theorem for interplanetary foreshocks with a structure similar to Earth’s foreshock allows to predict acceleration rather than deceleration of the solar wind in front of interplanetary shocks in the Earth-bound reference frame. The main conclusion is that the theory of ponderomotive plasma modification is of undoubted interest for the interpretation of in situ measurements in the interplanetary environment.
期刊介绍:
Solar System Research publishes articles concerning the bodies of the Solar System, i.e., planets and their satellites, asteroids, comets, meteoric substances, and cosmic dust. The articles consider physics, dynamics and composition of these bodies, and techniques of their exploration. The journal addresses the problems of comparative planetology, physics of the planetary atmospheres and interiors, cosmochemistry, as well as planetary plasma environment and heliosphere, specifically those related to solar-planetary interactions. Attention is paid to studies of exoplanets and complex problems of the origin and evolution of planetary systems including the solar system, based on the results of astronomical observations, laboratory studies of meteorites, relevant theoretical approaches and mathematical modeling. Alongside with the original results of experimental and theoretical studies, the journal publishes scientific reviews in the field of planetary exploration, and notes on observational results.