Auroral evidence of radial transport at Jupiter during January 2014

This work is based on observations made with the NASA/ESA Hubble Space Telescope (observation ID: GO13035), obtained at the Space Telescope Science Institute (STScI), which is operated by AURA, Inc., for NASA. The Hubble observations are available from the STScI website. The authors would like to acknowledge the contributions of teams involved in the Wind spacecraft mission, NASA. The Wind/WAVES data are available through CDAWeb. ; We present Jovian auroral observations from the 2014 January Hubble Space Telescope (HST) campaign and investigate the auroral signatures of radial transport in the magnetosphere alongside contemporaneous radio and Hisaki EUV data. HST FUV auroral observations on day 011 show, for the first time, a significantly super-rotating polar spot poleward of the main emission on the dawnside. The spot transitions from the polar to main emission region in the presence of a locally broad, bright dawnside main emission feature and two large equatorward emission features. Such a configuration of the main emission region is also unreported to date. We interpret the signatures as part of a sequence of inward radial transport processes. Hot plasma inflows from tail reconnection are thought to flow planetward and could generate the super-rotating spot. The main emission feature could be the result of flow shears from prior hot inflows. Equatorward emissions are observed. These are evidence of hot plasma injections in the inner magnetosphere. The images are thought to be part of a prolonged period of reconnection. Radio emissions measured by WIND suggest that hectometric (HOM) and non-Io decametric (DAM) signatures are associated with the sequence of auroral signatures, which implies a global magnetospheric disturbance. The reconnection and injection interval can continue for several hours. ; R.L.G. was supported by a STFC studentship. S.V.B. was supported by an RAS fellowship and an STFC Ernest Rutherford Fellowship. J.D.N. was supported by an STFC Advanced Fellowship (ST/I004084/1). M.F.V. was ...