EGU24-13547, updated on 09 Mar 2024
https://doi.org/10.5194/egusphere-egu24-13547
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

How do inferred statistical properties of switchbacks depend on their definition?

Srijan Bharati Das and Samuel Badman
Srijan Bharati Das and Samuel Badman
  • Center for Astrophysics Harvard and Smithsonian, High Energy Astrophysics (HEA) Division , United States of America (srijanbdas@alumni.princeton.edu)

Deflections in magnetic fields accompanied by Alfvenic velocity fluctuations are observed in the solar wind and have been termed as switchbacks. While signature of switchbacks have been reported from analysis of Ulysses, Wind and Helios satellites at distances of distances of about 2.4 A.U, 1.0 A.U and 0.3 A.U respectively, since 2018, Parker Solar Probe (PSP) has been providing us a wealth of in-situ measurements within as close as 10 solar radius. Studies on identification of SBs and its properties have boomed in the era of PSP and Solar Orbiter. Open questions regarding the origin of SBs exist which require rigorous quantification of SB properties. However, in order to assess properties across SB events, choices have to be made for how to categorize SBs based on classifying criteria for example, the extent of deflection of the magnetic field compared to the background field (commonly known as the Z-angle), the duration and strength of field or velocity fluctuations during the SB event. A key feature that also requires quantification when classifying SBs is what constitutes the quiet background --- currently common choices include using a running average to build a smooth background and picking out deflections about the smoothened fields or choosing the Parker spiral to construct the background fields. By picking out specific criteria for classifying SBs and analyzing common time periods on the same SB definitions, we investigate to what extent inferred properties depend on the chosen definitions.

How to cite: Das, S. B. and Badman, S.: How do inferred statistical properties of switchbacks depend on their definition?, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-13547, https://doi.org/10.5194/egusphere-egu24-13547, 2024.