Magnetic Waves Excited by Newborn Pickup H+ Near Jupiter: Neutral Hydrogen Loss by the Planetary System
Name
JGR Space Physics - 2022 - Hollick - Magnetic Waves Excited by Newborn Pickup H Near Jupiter Neutral Hydrogen Loss by the.pdf
Description
Published version
Size
1.9 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Hollick, Sophia J
Smith, Charles W
Pine, Zackary B
Argall, Matthew R
Joyce, Colin J
Isenberg, Philip A
Vasquez, Bernard J
Schwadron, Nathan A
Sokół, Justyna M
Bzowski, Maciej
Date Issued
July 14, 2022
Journal
Journal of Geophysical Research: Space Physics
Publisher
American Geophysical Union
Citation
Hollick, S. J., Smith, C. W., Pine, Z. B., Argall, M. R., Joyce, C. J., Isenberg, P. A., et al. (2022). Magnetic waves excited by newborn pickup H+ near Jupiter: Neutral hydrogen loss by the planetary system. Journal of Geophysical Research: Space Physics, 127, e2021JA030086.
Version
Final published version
Abstract
We report here observations of magnetic waves recorded by the Voyager spacecraft in the solar wind near Jupiter that are possibly the result of excitation by newborn pickup H+. Consideration of growth rates due to the known interstellar ion sources strongly disfavor an interstellar source. To determine the likely source of the waves, we compute the minimum ion production rate by equating wave growth to turbulent cascade rates and derive a lower limit for the production of H+ at the times of observations. The only available source of neutral H at these times and at the levels required is the Jovian system, most notably charge exchange between energetic protons and the neutral clouds around Io and Europa's orbits. Further refinement of the source identity is not possible at this time. We provide an estimate for the neutral H source subject to assumptions of the latitudinal extent of the population which is not constrained by observation.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1029/2021ja030086
