Telloni, Daniele;
Adhikari, Laxman;
Zank, Gary P;
Hadid, Lina Z;
Sanchez-Cano, Beatriz;
Sorriso-Valvo, Luca;
Zhao, Lingling;
... Richter, Ingo; + view all
(2022)
Observation and Modeling of the Solar Wind Turbulence Evolution in the Sub-Mercury Inner Heliosphere.
The Astrophysical Journal Letters
, 938
(2)
, Article L8. 10.3847/2041-8213/ac9624.
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Abstract
This letter exploits the radial alignment between the Parker Solar Probe and BepiColombo in late 2022 February, when both spacecraft were within Mercury’s orbit. This allows the study of the turbulent evolution, namely, the change in spectral and intermittency properties, of the same plasma parcel during its expansion from 0.11 to 0.33 au, a still unexplored region. The observational analysis of the solar wind turbulent features at the two different evolution stages is complemented by a theoretical description based on the turbulence transport model equations for nearly incompressible magnetohydrodynamics. The results provide strong evidence that the solar wind turbulence already undergoes significant evolution at distances less than 0.3 au from the Sun, which can be satisfactorily explained as due to evolving slab fluctuations. This work represents a step forward in understanding the processes that control the transition from weak to strong turbulence in the solar wind and in properly modeling the heliosphere.
| Type: | Article |
|---|---|
| Title: | Observation and Modeling of the Solar Wind Turbulence Evolution in the Sub-Mercury Inner Heliosphere |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/2041-8213/ac9624 |
| Publisher version: | https://doi.org/10.3847/2041-8213/ac9624 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, HIGH-SPEED STREAMS, RADIAL EVOLUTION, ORBITER, PROBE, FLUCTUATIONS, WAVES, POWER, ANISOTROPY, CASCADE |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10158384 |
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