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Alfvén Wing-Like Structures in Titan's Magnetotail During T122-T126 Flybys
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. (Astronomi och rymdfysik)ORCID iD: 0000-0002-1377-6401
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0002-1261-7580
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0002-2107-5859
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0003-2647-8259
2024 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 129, no 6, article id e2023JA032265Article in journal (Refereed) Published
Abstract [en]

In this paper, we study Titan's magnetotail using Cassini data from the T122-T126 flybys. These consecutive flybys had a similar flyby geometry and occurred at similar Saturn magnetospheric conditions, enabling an analysis of the magnetotail's structure. Using measurements from Cassini's magnetometer (MAG) and Radio and Plasma Wave System/Langmuir probe (RPWS/LP) we identify several features consistent with reported findings from earlier flybys, for example, T9, T63 and T75. We find that the so-called ’split’ signature of the magnetotail becomes more prominent at distances of at least 3,260 km (1.3 RT) downstream of Titan. We also identify a specific signature of the sub-alfvenic interaction of Titan with Saturn, the Alfvén wings, which are observed during the T123 and T124 flyby. A coordinate transformation is applied to mitigate variations in the upstream magnetic field, and all the flybys are projected into a new reference frame—aligned to the background magnetic field reference frame (BFA). We show that Titan's magnetotail is confined to a narrow region of around ∼4 RT YBFA. Finally, we analyze the general draping pattern in Titan's magnetotail throughout the TA to T126 flybys.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2024. Vol. 129, no 6, article id e2023JA032265
Keywords [en]
Titan, magnetotail, alfven wing, plasma
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-533017DOI: 10.1029/2023JA032265ISI: 001241265300001OAI: oai:DiVA.org:uu-533017DiVA, id: diva2:1878094
Funder
Swedish Research Council, 2020-03962Swedish National Space BoardAvailable from: 2024-06-26 Created: 2024-06-26 Last updated: 2024-06-26Bibliographically approved

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Kim, KonstantinEdberg, Niklas J. T.Wahlund, Jan-ErikVigren, Erik

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Kim, KonstantinEdberg, Niklas J. T.Wahlund, Jan-ErikVigren, Erik
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