In situ observations of large-amplitude Alfvén waves heating and accelerating the solar wind

• 成果类型: Article
• 署名作者: Rivera, Yeimy J.; Badman, Samuel T.; Stevens, Michael L.; Verniero, Jaye L.; Stawarz, Julia E.; Shi, Chen; Raines, Jim M.; Paulson, Kristoff W.; Owen, Christopher J.; Niembro, Tatiana; Louarn, Philippe; Livi, Stefano A.; Lepri, Susan T.; Kasper, Justin C.; Horbury, Timothy S.; Halekas, Jasper S.; Dewey, Ryan M.; De Marco, Rossana; Bale, Stuart D.
• 署名单位: Smithsonian Institution; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; Northumbria University; University of California System; University of California Los Angeles; University of Michigan System; University of Michigan; University of London; University College London; Centre National de la Recherche Scientifique (CNRS); Universite de Toulouse; Universite Toulouse III - Paul Sabatier; Southwest Research Institute; Imperial College London; University of California System; University of California Berkeley
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8956
• DOI: 10.1126/science.adk6953
• 发表日期: 2024-08-30
• 页码: 962-966
• 关键词: turbulent cascade; radial evolution; 1 au; abundance; FLOWS

摘要

After leaving the Sun's corona, the solar wind continues to accelerate and cools, but more slowly than expected for a freely expanding adiabatic gas. Alfv & eacute;n waves are perturbations of the interplanetary magnetic field that transport energy. We use in situ measurements from the Parker Solar Probe and Solar Orbiter spacecraft to investigate a stream of solar wind as it traverses the inner heliosphere. The observations show heating and acceleration of the plasma between the outer edge of the corona and near the orbit of Venus, along with the presence of large-amplitude Alfv & eacute;n waves. We calculate that the damping and mechanical work performed by the Alfv & eacute;n waves are sufficient to power the heating and acceleration of the fast solar wind in the inner heliosphere.