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Detection of small magnetic flux ropes from the third and fourth Parker Solar Probe encounters

Abstract : Context. Aims. We systematically search for magnetic flux rope structures in the solar wind to within the closest distance to the Sun of ~0.13 AU, using data from the third and fourth orbits of the Parker Solar Probe. Methods. We extended our previous magnetic helicity-based technique of identifying magnetic flux rope structures. The method was improved upon to incorporate the azimuthal flow, which becomes larger as the spacecraft approaches the Sun. Results. A total of 21 and 34 magnetic flux ropes are identified during the third (21-day period) and fourth (17-day period) orbits of the Parker Solar Probe, respectively. We provide a statistical analysis of the identified structures, including their relation to the streamer belt and heliospheric current sheet crossing.
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https://hal-insu.archives-ouvertes.fr/insu-03343161
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Submitted on : Tuesday, September 14, 2021 - 8:50:05 AM
Last modification on : Wednesday, November 17, 2021 - 12:32:14 PM

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L.-L. Zhao, G. Zank, Q. Hu, D. Telloni, Y. Chen, et al.. Detection of small magnetic flux ropes from the third and fourth Parker Solar Probe encounters. Astronomy and Astrophysics - A&A, EDP Sciences, 2021, 650, pp.A12. ⟨10.1051/0004-6361/202039298⟩. ⟨insu-03343161⟩

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