Coronal hole picoflare jets are the progenitors of both the fast and the Alfv\'enic slow solar wind
| Autor: | Chitta, L. P., Huang, Z., D'Amicis, R., Calchetti, D., Zhukov, A. N., Kraaikamp, E., Verbeeck, C., Cuadrado, R. Aznar, Hirzberger, J., Berghmans, D., Horbury, T. S., Solanki, S. K., Owen, C. J., Harra, L., Peter, H., Schühle, U., Teriaca, L., Louarn, P., Livi, S., Giunta, A. S., Hassler, D. M., Wang, Y. -M. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The solar wind, classified by its bulk speed and the Alfv\'enic nature of its fluctuations, generates the heliosphere. The elusive physical processes responsible for the generation of the different types of the wind are a topic of active debate. Recent observations revealed intermittent jets with kinetic energy in the picoflare range, emerging from dark areas of a polar coronal hole threaded by open magnetic field lines. These could substantially contribute to the solar wind. However, their ubiquity and direct links to the solar wind have not been established. Here we report a unique set of remote-sensing and in-situ observations from the Solar Orbiter spacecraft, that establish a unified picture of the fast and Alfv\'enic slow wind, connected to the similar widespread picoflare jet activity in two coronal holes. Radial expansion of coronal holes ultimately regulates the speed of the emerging wind. Comment: Accepted for publication in Astronomy and Astrophysics. Online animations available at https://owncloud.gwdg.de/index.php/s/ytjcW4Um1I6W2oZ |
| Databáze: | arXiv |
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