Chitta, LP;
Zhukov, AN;
Berghmans, D;
Peter, H;
Parenti, S;
Mandal, S;
Aznar Cuadrado, R;
... Seaton, DB; + view all
(2023)
Picoflare jets power the solar wind emerging from a coronal hole on the Sun.
Science
, 381
(6660)
pp. 867-872.
10.1126/science.ade5801.
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2308.13044.pdf - Accepted Version Download (5MB) | Preview |
Abstract
Coronal holes are areas on the Sun with open magnetic field lines. They are a source region of the solar wind, but how the wind emerges from coronal holes is not known. We observed a coronal hole using the Extreme Ultraviolet Imager on the Solar Orbiter spacecraft. We identified jets on scales of a few hundred kilometers, which last 20 to 100 seconds and reach speeds of ~100 kilometers per second. The jets are powered by magnetic reconnection and have kinetic energy in the picoflare range. They are intermittent but widespread within the observed coronal hole. We suggest that such picoflare jets could produce enough high-temperature plasma to sustain the solar wind and that the wind emerges from coronal holes as a highly intermittent outflow at small scales.
Type: | Article |
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Title: | Picoflare jets power the solar wind emerging from a coronal hole on the Sun. |
Location: | United States |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1126/science.ade5801 |
Publisher version: | https://doi.org/10.1126/science.ade5801 |
Language: | English |
Additional information: | Copyright © 2023 the authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. - This version is the author accepted manuscript. - This research was funded in whole or in part by the European Union through Horizon Europe (grant no. 101039844), a cOAlition S organization. The author will make the Author Accepted Manuscript (AAM) version available under a CC BY public copyright license. |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
URI: | https://discovery.ucl.ac.uk/id/eprint/10176244 |
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