@article{Laker:2022:mnras/stac2477,
author = {Laker, R and Horbury, TS and Matteini, L and Bale, SD and Stawarz, JE and Woodham, LD and Woolley, T},
doi = {mnras/stac2477},
journal = {Monthly Notices of the Royal Astronomical Society},
pages = {1001--1005},
title = {Switchback deflections beyond the early parker solar probe encounters},
url = {http://dx.doi.org/10.1093/mnras/stac2477},
volume = {517},
year = {2022}
}

Download

TY  - JOUR
AB  - Switchbacks are Aflvénic fluctuations in the solar wind, which exhibit large rotations in the magnetic field direction. Observations from Parker Solar Probe’s (PSP’s) first two solar encounters have formed the basis for many of the described switchback properties and generation mechanisms. However, this early data may not be representative of the typical near-Sun solar wind, biasing our current understanding of these phenomena. One defining switchback property is the magnetic deflection direction. During the first solar encounter, this was primarily in the tangential direction for the longest switchbacks, which has since been discussed as evidence, and a testable prediction, of several switchback generation methods. In this study, we re-examine the deflection direction of switchbacks during the first eight PSP encounters to confirm the existence of a systematic deflection direction. We first identify switchbacks exceeding a threshold deflection in the magnetic field and confirm a previous finding that they are arc-polarized. In agreement with earlier results from PSP’s first encounter, we find that groups of longer switchbacks tend to deflect in the same direction for several hours. However, in contrast to earlier studies, we find that there is no unique direction for these deflections, although several solar encounters showed a non-uniform distribution in deflection direction with a slight preference for the tangential direction. This result suggests a systematic magnetic configuration for switchback generation, which is consistent with interchange reconnection as a source mechanism, although this new evidence does not rule out other mechanisms, such as the expansion of wave modes.
AU  - Laker,R
AU  - Horbury,TS
AU  - Matteini,L
AU  - Bale,SD
AU  - Stawarz,JE
AU  - Woodham,LD
AU  - Woolley,T
DO  - mnras/stac2477
EP  - 1005
PY  - 2022///
SN  - 0035-8711
SP  - 1001
TI  - Switchback deflections beyond the early parker solar probe encounters
T2  - Monthly Notices of the Royal Astronomical Society
UR  - http://dx.doi.org/10.1093/mnras/stac2477
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000865283600005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://academic.oup.com/mnras/article/517/1/1001/6692877
UR  - http://hdl.handle.net/10044/1/100496
VL  - 517
ER  - 

Download