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We report narrow band-filtered imaging observations of the Jovian H(3)(+ )3.4-mu m emission using the IRCS (infrared camera and spectrograph) on the Subaru telescope taken on 25 May 2016. Approximately 1 hr of data was taken at intervals of 45-110 s, with high spatial resolution (similar to 0.2 arcsec) using adaptive optics. In the northern polar region, we found bright patch-like emissions on the poleward side of the main oval. One of them had a pulsation period of similar to 10 min. We utilized an H-3(+) emission model to investigate the response time of the H-3(+) emission to abrupt and periodic variations of the precipitating electron flux. The model showed that the H-3(+) emission could pulsate with this timescale due to a modulated flux of the precipitating electrons in the kilo-electron-volt to tens of kilo-electron-volt energy range.

Plain Language Summary We made a movie of the Jovian infrared aurora for the first time. The high spatial resolution images were observed for similar to 1 hr with the time interval of 45-110 s using the infrared camera of the Subaru-8-m telescope. This movie showed that the infrared aurora from the hydrogen ion molecule H-3(+) had patchy structures on the northern auroral region and a pulsation period of similar to 10 min. Our model analysis proved that such a fast variation could be driven by the modulation of the kilo-electron-volt to tens of kilo-electron-volt electrons coming into Jupiter.