Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...702..171f&link_type=abstract
The Astrophysical Journal, Volume 702, Issue 1, pp. 171-177 (2009).
Astronomy and Astrophysics
Astronomy
Atomic Data, Atomic Processes, Line: Formation, Line: Identification, Planets And Satellites: Individual: Jupiter, X-Rays: Individual: Jupiter Laboratory
Scientific paper
The X-ray signature of L-shell charge exchange in sulfur was studied in the laboratory. A comparison of the charge exchange (CX) spectra with those obtained under electron-impact excitation showed marked differences. In the CX spectra, an enhancement was observed in the transitions from levels with high principal quantum numbers, n = 4, 5, 6 → n = 2 in comparison with the n = 3 → n = 2 transitions that dominate the direct excitation spectra. An even greater enhancement was recorded in the transitions from the levels of electron capture to the ground states: n = 7, 8, 9 → n = 2. The spectra mainly consist of emission from S XIV, but lower charge states such as S XIII, S XII, and S XI also contribute. The results have been compared with observations made by the Chandra and XMM-Newton X-ray Observatories of Jupiter's polar regions. The enhancement we noticed in transitions from the high-n levels is not seen in the Chandra spectra.
Beiersdorfer Peter
Brown Gregory V.
Frankel Miriam
Gu Min Feng
Kelley Richard L.
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