Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.303..310c&link_type=abstract
Nature (ISSN 0028-0836), vol. 303, May 26, 1983, p. 310-312.
Astronomy and Astrophysics
Astronomy
8
Astronomical Spectroscopy, Auroras, Emission Spectra, Uranus Atmosphere, Hydrogen, Iue, Lyman Alpha Radiation, Molecular Spectra, Uranus, Auroras, Observations, Lyman-Alpha Radiation, Wavelengths, Iue, Infrared Ultraviolet Explorer, Source, Resonance, Scattering, Emissions, Hydrogen, Comparisons, Saturn, Spectra
Scientific paper
There have been three recent reports of the detection of Lyman-alpha radiation (due to atomic hydrogen, H, at wavelength 1,216 A) from Uranus by means of the International Ultraviolet Explorer (IUE) satellite. The interpretations of these results differ. Two reports conclude that there is a strong aurora on Uranus, but the third concludes that the source is resonance scattering of solar Lyman-alpha. This paper reports the detection of emission features due to molecular hydrogen, H2, near 1,600 A. This detection is near the limit of the IUE sensitivity. If it is real, the detection of H2 emission strongly supports the conclusion that Uranus has an aurora comparable in strength with those of the inner two giant planets, Jupiter and Saturn. The first published IUE spectra of the Saturn aurora are also presented.
Caldwell J. Jr. J.
Combes Michel
Encrenaz Th.
Owen Theodore
Wagener Richard
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