Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...263l.105c&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 263, Dec. 15, 1982, p. L105-L109.
Astronomy and Astrophysics
Astronomy
31
Auroral Spectroscopy, Iue, Lyman Alpha Radiation, Ultraviolet Spectra, Uranus Atmosphere, Charged Particles, H Alpha Line, Particle Precipitation, Planetary Magnetic Fields, Spaceborne Astronomy
Scientific paper
A series of observations of Uranus obtained with the short-wavelength spectrograph of the International Ultraviolet Explorer Observatory in 1982 April and June have revealed unexpectedly strong H Lyman-alpha emission which varied between 430 and 850 rayleighs in observed disk-averaged brightness over the course of these observations. The variability of the emission alone indicates that much of the emission must be produced by charged particle excitation of H in Uranus's upper atmosphere. In addition, comparison of these data with a model for resonant scattering of solar H Lyman-alpha emission indicates that, over a wide range of model conditions, an emission brightness of even 430 rayleighs (which was the lowest observed value) corresponds to an H column density on the order of 10 to the 17th/sq cm in Uranus's upper atmosphere. These data offer the first strong evidence for the presence of aurorae and therefore a magnetic field on Uranus.
No associations
LandOfFree
Detection of auroral hydrogen Lyman-alpha emission from Uranus 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 Detection of auroral hydrogen Lyman-alpha emission from Uranus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of auroral hydrogen Lyman-alpha emission from Uranus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-928642