eprintid: 10198539 rev_number: 6 eprint_status: archive userid: 699 dir: disk0/10/19/85/39 datestamp: 2024-10-17 09:21:11 lastmod: 2024-10-17 09:21:11 status_changed: 2024-10-17 09:21:11 type: article metadata_visibility: show sword_depositor: 699 creators_name: Rivera, Yeimy J creators_name: Badman, Samuel T creators_name: Stevens, Michael L creators_name: Raines, Jim M creators_name: Owen, Christopher J creators_name: Paulson, Kristoff creators_name: Niembro, Tatiana creators_name: Livi, Stefano A creators_name: Lepri, Susan T creators_name: Landi, Enrico creators_name: Halekas, Jasper S creators_name: Ervin, Tamar creators_name: Dewey, Ryan M creators_name: Coburn, Jesse T creators_name: Bale, Stuart D creators_name: Alterman, BL title: Mixed Source Region Signatures inside Magnetic Switchback Patches Inferred by Heavy Ion Diagnostics ispublished: pub divisions: UCL divisions: B04 divisions: C06 divisions: F63 note: © 2024 IOP Publishing. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (http://creativecommons.org/licenses/by/4.0/). abstract: Since Parker Solar Probe’s (Parker’s) first perihelion pass at the Sun, large-amplitude Alfvén waves grouped in patches have been observed near the Sun throughout the mission. Several formation processes for these magnetic switchback patches have been suggested with no definitive consensus. To provide insight into their formation, we examine the heavy ion properties of several adjacent magnetic switchback patches around Parker’s 11th perihelion pass, capitalizing on a spacecraft lineup with Solar Orbiter where each samples the same solar wind streams over a large range of longitudes. Heavy ion properties (Fe/O, C6+/C5+, O7+/O6+) related to the wind’s coronal origin, measured with Solar Orbiter, can be linked to switchback patch structures identified near the Sun with Parker. We find that switchback patches do not contain distinctive ion and elemental compositional signatures different from the surrounding nonswitchback solar wind. Both the patches and ambient wind exhibit a range of fast and slow wind qualities, indicating coronal sources with open and closed field lines in close proximity. These observations and modeling indicate switchback patches form in coronal hole boundary wind and with a range of source region magnetic and thermal properties. Furthermore, the heavy ion signatures suggest interchange reconnection and/or shear-driven processes may play a role in their creation. date: 2024 date_type: published publisher: American Astronomical Society official_url: http://dx.doi.org/10.3847/1538-4357/ad7815 oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2327698 doi: 10.3847/1538-4357/ad7815 lyricists_name: Owen, Christopher lyricists_id: CJOWE13 actors_name: Owen, Christopher actors_id: CJOWE13 actors_role: owner full_text_status: public publication: The Astrophysical Journal volume: 974 number: 2 article_number: 198 citation: Rivera, Yeimy J; Badman, Samuel T; Stevens, Michael L; Raines, Jim M; Owen, Christopher J; Paulson, Kristoff; Niembro, Tatiana; ... Alterman, BL; + view all <#> Rivera, Yeimy J; Badman, Samuel T; Stevens, Michael L; Raines, Jim M; Owen, Christopher J; Paulson, Kristoff; Niembro, Tatiana; Livi, Stefano A; Lepri, Susan T; Landi, Enrico; Halekas, Jasper S; Ervin, Tamar; Dewey, Ryan M; Coburn, Jesse T; Bale, Stuart D; Alterman, BL; - view fewer <#> (2024) Mixed Source Region Signatures inside Magnetic Switchback Patches Inferred by Heavy Ion Diagnostics. The Astrophysical Journal , 974 (2) , Article 198. 10.3847/1538-4357/ad7815 <https://doi.org/10.3847/1538-4357%2Fad7815>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10198539/1/Rivera_2024_ApJ_974_198.pdf