Hubble Space Telescope and New-Horizons simultaneous observations: Evidence of particle acceleration in the Jovian magnetotail

Details Hubble Space Telescope and New-Horizons simultaneous observations: Evidence of particle acceleration in the Jovian magnetotail Hubble Space Telescope and New-Horizons simultaneous observations: Evidence of particle acceleration in the Jovian magnetotail

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..728r&link_type=abstract

European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a

Computer Science

Scientific paper

The Hubble Space Telescope (HST) observed periodic isolated spots on the Jovian aurora, during the HST-ACS (Advanced Camera of Surveys) 2007 campaign. The auroral spots occurwith 2- to 3- day quasi-periodicity (Figure 1), and they magnetically map to the dawn sector of the magnetosphere. Because of their periodic cycle and observed location, it had been suggested that the polar dawn spots are related to the precipitated, heated plasma during reconnection process taking place in the Jovian magnetotail [1]. The New-Horizons spacecraft traversed the length of the Jovian magnetotail to > 2500 RJ in early 2007. The spacecraft's PEPSSI (Pluto Energetic Particle Spectrometer Science Investigation) instrumentmeasured velocity dispersions, anisotropies and compositional variations in the Jovian magnetotail (> 500 RJ ) with a 3 day periodicity. They reported signatures of energetic particle streaming away from the planet and injection sites in the near-tail region, possibly associated with magnetic reconnection events [2]. In the present study we compare a set of simultaneous HST and New-Horizons observations. During this period HST observes isolated auroral dawn spots and New- Horizons detects energetic ions exhibiting velocity dispersion streaming away from the planet on the same day, evidence of particle acceleration in the Jovian magnetotail. Based on this unique set of simultaneous observations we examine to what extent the Jovian ionosphere is supplied with accelerated plasma from the magnetotail and discuss the properties of the process. References [1] Radioti, A., D. Grodent, J.-C. Ǵerard, B. Bonfond and J.T. Clarke (2008), GRL, 35, L03104, doi:10.1029/2007GL032460. [2] McNutt R. L., Jr. , et al. (2007), Science, 318, 220.

Affiliated with

Also associated with

No associations

Rating

Hubble Space Telescope and New-Horizons simultaneous observations: Evidence of particle acceleration in the Jovian magnetotail does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hubble Space Telescope and New-Horizons simultaneous observations: Evidence of particle acceleration in the Jovian magnetotail, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hubble Space Telescope and New-Horizons simultaneous observations: Evidence of particle acceleration in the Jovian magnetotail will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1794221