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Evolution of Solar Wind Turbulence from 0.1 to 1 au during the First Parker Solar Probe-Solar Orbiter Radial Alignment

Telloni, D; Sorriso-Valvo, L; Woodham, LD; Panasenco, O; Velli, M; Carbone, F; Zank, GP; ... Angelini, V; + view all (2021) Evolution of Solar Wind Turbulence from 0.1 to 1 au during the First Parker Solar Probe-Solar Orbiter Radial Alignment. Astrophysical Journal Letters , 912 (2) , Article L21. 10.3847/2041-8213/abf7d1. Green open access

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Abstract

The first radial alignment between Parker Solar Probe and Solar Orbiter spacecraft is used to investigate the evolution of solar wind turbulence in the inner heliosphere. Assuming ballistic propagation, two 1.5 hr intervals are tentatively identified as providing measurements of the same plasma parcels traveling from 0.1 to 1 au. Using magnetic field measurements from both spacecraft, the properties of turbulence in the two intervals are assessed. Magnetic spectral density, flatness, and high-order moment scaling laws are calculated. The Hilbert–Huang transform is additionally used to mitigate short sample and poor stationarity effects. Results show that the plasma evolves from a highly Alfvénic, less-developed turbulence state near the Sun, to fully developed and intermittent turbulence at 1 au. These observations provide strong evidence for the radial evolution of solar wind turbulence.

Type: Article
Title: Evolution of Solar Wind Turbulence from 0.1 to 1 au during the First Parker Solar Probe-Solar Orbiter Radial Alignment
Open access status: An open access version is available from UCL Discovery
DOI: 10.3847/2041-8213/abf7d1
Publisher version: http://dx.doi.org/10.3847/2041-8213/abf7d1
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: EMPIRICAL MODE DECOMPOSITION, HIGH-SPEED STREAMS, INTERMITTENCY, FLUCTUATIONS, FREQUENCY, WAVES, ANISOTROPY, ORIGINS, SCALES, SPACE
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/10128957
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