EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Vasavada et al. 1999
Vasavada, A.R., Bouchez, A.H., Ingersoll, A.P., Little, B. and Anger and the Galileo SSI Team, C.D. (1999). Jupiter’s visible aurora and Io footprint. Journal of Geophysical Research 104: doi: 10.1029/1999JE001055. issn: 0148-0227.

Images obtained by the Galileo spacecraft's solid-state imaging (SSI) system represent the first survey of Jupiter's northern auroral emissions at visible wavelengths and on the nightside of the planet. These images captured the emissions with unprecedented spatial resolutions down to ~26 km pixel-1. Four classes of emission were observed: (1) a continuous, primary arc associated with the middle/outer magnetosphere, (2) a variable secondary arc associated with the region just beyond Io's torus, (3) diffuse polar cap emission, and (4) a patch and tail associated with the magnetic footprint of Io. The primary arc emission occurs at an altitude 245¿30 km above the 1-bar pressure level. Its horizontal width is typically a few hundred kilometers, and its total optical power output varied between ~1010 and ~1011 W in observations taken months apart. The location of the primary arc in planetary coordinates is similar to that on dayside images at other wavelengths and does not vary with local time. The morphology of the primary arc is not constant, changing from a multiply branched, latitudinally distributed pattern after dusk to a single, narrow arc before dawn. Emission from Io's ionospheric footprint is distinct from both the primary and secondary arcs. Measurements of its optical power output ranged from 2 to 7¿108 W. ¿ 1999 American Geophysical Union

BACKGROUND DATA FILES

Abstract

Keywords
Ionosphere, Auroral ionosphere, Planetology, Fluid Planets, Interactions with particles and fields, Planetology, Fluid Planets, Meteorology, Planetology, Solar System Objects, Jupiter
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit