Home » News & Blogs » Coronal mass ejection triggering Jupiter X-ray aurora and non Io decametric radio emission, 2011 October 2-4
Bookmark and Share
Victor Herrero Radio Astronomy Blog

Coronal mass ejection triggering Jupiter X-ray aurora and non Io decametric radio emission, 2011 October 2-4

24 Mar 2016, 17:25 UTC
Coronal mass ejection triggering Jupiter X-ray aurora and non Io decametric radio emission, 2011 October 2-4
(200 words excerpt, click title or image to see full post)

With many thanks, I refer to:"The impact of an ICME on the Jovian X-ray aurora" Dunn et al. 2016:http://onlinelibrary.wiley.com/doi/10.1002/2015JA021888/fullhttps://www.ucl.ac.uk/news/news-articles/0316/220316-Solar-storms-trigger-Jupiters-Northern-LightsAbstract: "We report the first Jupiter X-ray observations planned to coincide with an interplanetary coronal mass ejection (ICME). At the predicted ICME arrival time, we observed a factor of ∼8 enhancement in Jupiter's X-ray aurora. Within 1.5 h of this enhancement, intense bursts of non-Io decametric radio emission occurred. Spatial, spectral, and temporal characteristics also varied between ICME arrival and another X-ray observation two days later. Gladstone et al. (2002) discovered the polar X-ray hot spot and found it pulsed with 45 min quasiperiodicity. During the ICME arrival, the hot spot expanded and exhibited two periods: 26 min periodicity from sulfur ions and 12 min periodicity from a mixture of carbon/sulfur and oxygen ions. After the ICME, the dominant period became 42 min. By comparing Vogt et al. (2011) Jovian mapping models with spectral analysis, we found that during ICME arrival at least two distinct ion populations, from Jupiter's dayside, produced the X-ray aurora. Auroras mapping to magnetospheric field lines between 50 and 70 RJ were dominated by emission from precipitating sulfur ions (S7+,…,14+). Emissions mapping to closed field lines between 70 ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day

astronomy_pod