Volume 650, June 2021
Parker Solar Probe: Ushering a new frontier in space exploration
|Number of page(s)||9|
|Section||The Sun and the Heliosphere|
|Published online||02 June 2021|
Detection of small magnetic flux ropes from the third and fourth Parker Solar Probe encounters
Center for Space Plasma and Aeronomic Research (CSPAR), The University of Alabama in Huntsville,
2 Department of Space Science, The University of Alabama in Huntsville, Huntsville, AL 35899, USA
3 National Institute for Astrophysics, Astrophysical Observatory of Torino Via Osservatorio 20, 10025 Pino Torinese, Italy
4 Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
5 Smithsonian Astrophysical Observatory, Cambridge, MA 02138, USA
6 Physics Department, University of California, Berkeley, CA 94720-7300, USA
7 Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, USA
8 The Blackett Laboratory, Imperial College London, London, SW7 2AZ, UK
9 School of Physics and Astronomy, Queen Mary University of London, London E1 4NS, UK
10 LPC2E, CNRS and University of Orléans, Orléans, France
11 School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
12 Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
13 Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA
14 Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA
15 Department of Planetary Sciences, University of Arizona, Tucson, AZ 85719, USA
16 Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723, USA
Accepted: 2 October 2020
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.
Key words: solar wind / Sun: magnetic fields / turbulence / methods: observational
© ESO 2021
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