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

Autor: Rivera YJ; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA 02138, USA., Badman ST; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA 02138, USA., Stevens ML; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA 02138, USA., Verniero JL; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA., Stawarz JE; Department of Mathematics, Physics, and Electrical Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK., Shi C; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095, USA., Raines JM; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA., Paulson KW; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA 02138, USA., Owen CJ; Mullard Space Science Laboratory, University College London, Holmbury St Mary RH5 6NT, UK., Niembro T; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA 02138, USA., Louarn P; Institut de Recherche en Astrophysique et Planétologie, Centre National de la Recherche Scientifique, University of Toulouse, Toulouse, France., Livi SA; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA.; Southwest Research Institute, San Antonio, TX 78228, USA., Lepri ST; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA., Kasper JC; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA.; BWX Technologies Inc, Washington, DC 20001, USA., Horbury TS; Department of Physics, Imperial College London, London SW7 2AZ, UK., Halekas JS; Department of Physics and Astronomy, University of Iowa, IA 52242, USA., Dewey RM; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA., De Marco R; Institute for Space Astrophysics and Planetology, 00133 Rome, Italy., Bale SD; Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2024 Aug 30; Vol. 385 (6712), pp. 962-966. Date of Electronic Publication: 2024 Aug 29.
DOI: 10.1126/science.adk6953
Abstrakt: 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. Alfvén 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 Alfvén waves. We calculate that the damping and mechanical work performed by the Alfvén waves are sufficient to power the heating and acceleration of the fast solar wind in the inner heliosphere.
Databáze: MEDLINE
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