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    Astrophysicists find evidence that Alfvén Waves Lead to Heat Generation in the Magnetosphere

    November 29, 2024, Categories  Astronomy/Space

    Evidence that Alfvén waves accelerate ion beams, creating small-scale acoustic waves, generating heat
    An artist’s impression shows the four spacecraft of the Magnetospheric Multiscale Mission, which fly in a tetrahedral formation and gather information about the microphysics of reconnecting magnetic-field lines and the associated processes. Credit: NASA/GSFC

    A small team of astrophysicists at the University of California, Los Angeles, working with colleagues from the University of Texas at Dallas and the University of Colorado, Boulder, has found evidence that Alfvén waves in space plasmas speed up ion beams, resulting in the creation of small-scale acoustic waves that in turn generate heat in the magnetosphere.

    In their study, published in the journal Physical Review Letters, the group used data from the four-spacecraft Magnetospheric Multiscale (MMS) mission that took place in 20...

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