Magnetic imprints in the solar wind - Nature Astronomy
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The transformations of energy that accompany solar magnetic activity have far-reaching ramifications beyond heliophysics. Understanding the dynamical chain is fundamental to assess habitability and the capacity for life elsewhere. Access through your institution Buy or subscribe The Sun and most solar-like stars are surrounded by an envelope of hot gas, the corona, that expands outwards into space in the form of a supersonic plasma wind. Spacecraft observations up until and throughout the 1990s, specifically from the Helios and Ulysses spacecraft (the only mission to fly over the solar poles), demonstrated that the solar wind emerging from the polar open regions of the corona was typically fast, with speeds ranging between 700 and 800 km s–1 at Earth’s orbit, while in the ecliptic plane the wind was much slower, sometimes as low as 200–300 km s–1. Observations also showed that the slow wind seems to occupy a region of space too extended to be made up only of the ‘edges of coronal holes’, or the boundaries between open and closed coronal magnetic field lines: something was clearly missing in our understanding of how the solar magnetic field connects into the heliosphere. This is a preview of subscription content, access via your institution Access options. Access through your institution Access through your institution Change institution Buy or subscribe Subscribe to Journal Get full journal access for 1 year 111,21?? only 9,27 ? per issue Subscribe All prices are NET prices. VAT will be added later in the checkout. Tax calculation will be finalised during checkout. Buy article Get time limited or full article access on ReadCube. $32.00 Buy All prices are NET prices. Additional access options:. Log in . Learn about institutional subscriptions . Fig. 1: The coronal web. References. Chitta, L. P., Seaton, D. B., Downs, C., DeForest, C. E. & Higginson, A. K. Nat. Astron. https://doi.org/10.1038/s41550-022-01834-5 (2022). Article? Google Scholar? Download references Author information. Authors and Affiliations. Institute of Geophysics & Planetary Physics, Department of Earth, Planetary & Space Sciences, University of California, Los Angeles, CA, USA Marco Velli J. Geiss Fellow, International Space Science Institute, Bern, Switzerland Marco Velli Authors Marco Velli View author publications You can also search for this author in PubMed ? Google Scholar Corresponding author. Correspondence to Marco Velli. Ethics declarations. Competing interests. The author declares no competing interests. Rights and permissions. Reprints and Permissions About this article. Cite this article. Velli, M. Magnetic imprints in the solar wind. Nat Astron (2023). https://doi.org/10.1038/s41550-022-01883-w Download citation Published: 27 January 2023 DOI: https://doi.org/10.1038/s41550-022-01883-w Share this article. Anyone you share the following link with will be able to read this content: Get shareable link Sorry, a shareable link is not currently available for this article. Copy to clipboard Provided by the Springer Nature SharedIt content-sharing initiative .
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