Electron conic distributions produced by solar ionizing radiation in planetary atmospheres

Peterson, W. K.; Brain, David; Yau, A. W.; Richards, P. G.

doi:10.1016/j.asr.2015.02.023

Cited by 1 publication

(2 citation statements)

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“…This differs from Earth‐based studies showing a maximum energy for bidirectional and upward electron conics from a few keV and even up to 40 keV peaking at altitudes corresponding to the auroral acceleration region, with those below the acceleration having energies only on the order of serveral hundred eV (Burch, 1995; Eliasson et al., 1996; Lundin et al., 1987; Menietti et al., 1994). Looking at Figures 8–11 together would suggest that electron conics at Jupiter have greater energies on auroral field lines compared to those on field lines poleward or equatorward similar to the Earth‐based studies (Eliasson et al., 1996; Menietti & Burch, 1985; Peterson et al., 2015). No Earth‐based study to date has reported downward electron conics.…”

Section: Comparison With Earth‐based Studiessupporting

confidence: 61%

“…Is there a solar illumination dependence for electron conics as there is for the polar aurora (Greathouse et al., 2021)? Are there electron conics within 30° of Jupiter's equator as there are at Earth (Peterson et al., 2015)? Furthermore, why are there no downward electron conics at Earth, and what does this say about the differences between Earth's magnetospheric dynamics and Jupiter's?…”

Section: Discussionmentioning

confidence: 99%

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A Survey of Electron Conics at Jupiter Utilizing the JADE‐E Data During Science Orbits 01, 03‐30

et al. 2022

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Electron conics were first discovered at Earth using the High Altitude Plasma Instrument (HAPI) aboard the Dynamics Explorer 1 (DE-1) spacecraft (Menietti & Burch, 1985). Menietti and Burch (1985) reported upward going electron distributions that peak at angles oblique to the local magnetic field, specifically, the electron conic pitch angle is just a little closer to 90° than the loss cone. For instance, if the loss cone has a pitch angle of 155°, then the electron conic will peak at a pitch angle less than 155°. Menietti and Burch (1985) observed electron conics within a pitch angle range of 150° and 170°. Two examples in that study showed data from the nightside main auroral region, and one example showed data from the polar cap. The electron conics in the nightside main auroral region appeared within the energy range of 2-5 keV, while those observed in the polar cap had energies on the order of 0.05-4 keV (Menietti & Burch, 1985). Electron conics of this nature are referred to as Type 1 electron conics by

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