Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh21a10m&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SH21A-10
Physics
0310 Airglow And Aurora, 6220 Jupiter, 6225 Mars, 6295 Venus, 7554 X Rays, Gamma Rays, And Neutrinos
Scientific paper
Planetary x-rays can be produced due to the following two mechanisms: (1) elastic scattering of solar x-rays by atmospheric neutrals, (2) absorption of solar x-rays by atoms and molecules in the K-shell, followed by fluorescent emission of x-rays. We present and compare the results of x-ray intensity calculations for these mechanisms for Venus, Mars, Jupiter, and Saturn. Elastic scattering is the dominant process for Jupiter and Saturn, although some carbon K-shell emission is present due to the methane in the atmospheres of these planets. The K-shell fluorescence mechanism for oxygen and carbon is important at Venus and Mars, where carbon dioxide is the major atmospheric species. We predict total soft x-ray intensities in the approximate range of 0.2 to 0.8 R for Venus, 0.05 to 0.2 R for Mars, and 0.01 to 0.04 R for Jupiter.
Cravens Thomas E.
Maurellis Ahilleas N.
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