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Anterograde Collisional Analysis of Solar Wind Ions


AuthorJohnson, E.; Maruca, B.~A.; McManus, M.; Klein, K.~G.; Lichko, E.~R.; Verniero, J.; Paulson, K.~W.; DeWeese, H.; Dieguez, I.; Qudsi, R.~A.; Kasper, J.; Stevens, M.; Alterman, B.~L.; Wilson, L.~B.; Livi, R.; Rahmati, A.; Larson, D.;
KeywordsParker Data Used; Solar wind; Collision physics; Plasma physics; 1534; 2065; 2089
AbstractOwing to its low density and high temperature, the solar wind frequently exhibits strong departures from local thermodynamic equilibrium, which include distinct temperatures for its constituent ions. Prior studies have found that the ratio of the temperatures of the two most abundant ions-protons (ionized hydrogen) and \ensuremath\alpha-particles (ionized helium)-is strongly correlated with the Coulomb collisional age. These previous studies, though, have been largely limited to using observations from single missions. In contrast, this present study utilizes contemporaneous, in situ observations from two different spacecraft at two different distances from the Sun: the Parker
Year of Publication2023
Journal\apj
Volume950
Number of Pages51
Section
Date Publishedjun
ISBN
URL
DOI10.3847/1538-4357/accc32