Chitta, LP;
Huang, Z;
D'Amicis, R;
Calchetti, D;
Zhukov, AN;
Kraaikamp, E;
Verbeeck, C;
... Wang, Y-M; + view all
(2025)
Coronal hole picoflare jets are progenitors of both fast and Alfvénic slow solar wind.
Astronomy & Astrophysics
, 694
, Article A71. 10.1051/0004-6361/202452737.
Preview |
PDF
Chitta_et_al_aa52737-24.pdf - Published Version Download (25MB) | Preview |
Abstract
Solar wind, classified by its bulk speed and the Alfvénic nature of its fluctuations, generates the heliosphere. The elusive physical processes responsible for the generation of the different types of this wind are a topic of active debate. Recent observations reveal 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 solar wind. However, their ubiquity and direct links to 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 fast and Alfvénic 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.
| Type: | Article |
|---|---|
| Title: | Coronal hole picoflare jets are progenitors of both fast and Alfvénic slow solar wind |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/202452737 |
| Publisher version: | https://doi.org/10.1051/0004-6361/202452737 |
| Language: | English |
| Additional information: | © The Authors 2025. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | magnetic reconnection / Sun: corona / Sun: magnetic fields / solar wind |
| 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/10205889 |
Loading...
Loading...Loading...| 1. |  United Kingdom | 1 |
| 2. |  United States | 1 |
Archive Staff Only
 |
View Item |
