UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

First vertical ion density profile in Jupiter's auroral atmosphere: Direct observations using the Keck II telescope

Lystrup, MB; Miller, S; Dello Russo, N; Vervack, RJ; Stallard, T; (2008) First vertical ion density profile in Jupiter's auroral atmosphere: Direct observations using the Keck II telescope. ASTROPHYS J , 677 (1) 790 - 797.

Full text not available from this repository.

Abstract

We present the first vertical ion density profiles of Jupiter's upper atmosphere derived directly from ground-based observations. Observations of infrared H-3(+) emissions in Jupiter's auroral/polar regions were collected by the high-resolution spectrometer NIRSPEC on the Keck II telescope. We have calculated vertical density profiles for a latitude in the southern auroral region using the measured column densities and a shell model of the Jovian ionospheric H-3(+) emission. We compare our resultant profiles to those generated by a recent one-dimensional model in both local thermodynamic equilibrium (LTE) and non-LTE conditions. We find good agreement with the model profiles up to 1800 km. Above that, however, our measurements show that more H-3(+) is produced than is predicted by the model. Our observational method is a new tool for probing Jupiter's upper atmosphere from Earth and can possibly be extended to the study of other gas giant planets.

Type: Article
Title: First vertical ion density profile in Jupiter's auroral atmosphere: Direct observations using the Keck II telescope
Keywords: infrared : solar system, methods : data analysis, planets and satellites : individual (Jupiter), techniques : spectroscopic, JOVIAN IONOSPHERE, THERMAL STRUCTURE, H-3(+) EMISSION, THERMOSPHERE, TEMPERATURE, WINDS, H-3+, DYNAMICS, REGION, MODEL
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Science and Technology Studies
URI: http://discovery.ucl.ac.uk/id/eprint/120742
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item