AffiliationUniv Arizona, Dept Planetary Sci
Univ Arizona, Lunar & Planetary Lab
MetadataShow full item record
PublisherAMER PHYSICAL SOC
CitationYoon, P. H., Seough, J., Salem, C. S., & Klein, K. G. (2019). Solar Wind Temperature Isotropy. Physical Review Letters, 123(14), 145101.
JournalPHYSICAL REVIEW LETTERS
RightsCopyright © 2019 American Physical Society.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractReliable models of the solar wind in the near-Earth space environment may constrain conditions close to the Sun. This is relevant to NASA's contemporary innerheliospheric mission Parker Solar Probe. Among the outstanding issues is how to explain the solar wind temperature isotropy. Perpendicular and parallel proton and electron temperatures near 1 AU are theoretically predicted to be unequal, but in situ observations show quasi-isotropy sufficiently below the instability threshold condition. This has not been satisfactorily explained. The present Letter shows that the dynamical coupling of electrons and protons via collisional processes and instabilities may contribute toward the resolution of this problem.
VersionFinal published version
SponsorsNASANational Aeronautics & Space Administration (NASA) [NNH18ZDA001N-HSR, NNX16AI59G, NSF SHINE 122498, NNX16AG81G]; NSFNational Science Foundation (NSF) ; GFT Charity, Inc.; National Research Foundation of Korea (NRF) - Ministry of Education [2017R1D1A1B03036181]