Search Publications

Observations of Continuous Quasiperiodic Auroral Pulsations on Saturn in High Time-Resolution UV Auroral Imagery

Badman, S. V.; Yao, Z. H.; Bader, A. +2 more

Saturn's aurora represents the ionospheric response to plasma processes occurring in the planet's entire magnetosphere. Short-lived ∼1-hr quasiperiodic high-energy electron injections, frequently observed in in situ particle and radio measurements, should therefore entail an associated flashing auroral signature. This study uses high time-resoluti…

Jupiter's Dark Polar Region as Observed by the Hubble Space Telescope During the Juno Approach Phase

Nichols, J. D.; Bunce, E. J.; Swithenbank-Harris, B. G.

We present an analysis of Jupiter's dark polar region, previously described as a crescent-shaped region devoid of emission along the dawnside poleward of the main oval. Using ultraviolet images obtained by the Hubble Space Telescope between days of year 137 and 176, coupled with interplanetary data captured during the approach phase of the NASA Ju…

Machine Learning Analysis of Jupiter's Far-Ultraviolet Auroral Morphology

Milan, S. E.; Nichols, J. D.; Kamran, A.

We present the first principal component analysis of Jupiter's far-ultraviolet auroras, in order to identify the most repeatable sources of variation in the auroral morphology. We show that the most recurrent source of variance is emission just poleward of the statistical oval on the dawnside. Further significant repeatable sources of variance are…