SH014-10
Observations of Low-Frequency Waves Excited by Newborn Interstellar Pickup He+ as Seen by the Ulysses Spacecraft

Tuesday, 8 December 2020: 11:10
Virtual
Anastasia Marchuk1, Charles William Smith2, Abigale S Watson3, Matthew R Argall2, Colin Joyce4, Philip A Isenberg5, Bernard John Vasquez2, Nathan Schwadron2, Maciej Bzowski6, Marzena A. Kubiak6 and Neil Murphy7, (1)University of New Hampshire Main Campus, Department of Physics and Institute for the Study of Earth, Oceans and Space, Durham, NH, United States, (2)University of New Hampshire, Durham, NH, United States, (3)Wentworth Institute of Technology, Department of Mechanical Engineering, Boston, MA, United States, (4)Princeton University, Department of Astrophysical Sciences, Princeton, NJ, United States, (5)Univ New Hampshire, Durham, NH, United States, (6)Space Research Centre Polish Academy of Sciences, Warsaw, Poland, (7)JPL, Pasadena, CA, United States
Recorded Presentation
Abstract:
We report an analysis of low-frequency waves in the Ulysses magnetic field data that arise from newborn interstellar pickup He+. Ulysses observations of waves excited by interstellar H+ have already been reported, but in this analysis we identify waves due to the ionization of He atoms. While neutral He can reach inside 1 AU in significant numbers whereas interstellar neutral H cannot, we find that most of the waves due to He+ are seen at moderate to low heliolatitude beyond 3 AU. This may reflect the nature of the orbit where Ulysses spends a greater fraction of its time in this region, or it may reflect the turbulence conditions. Our analysis will address this and related questions.
<< Previous Abstract | Next Abstract