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First Observation of Jupiter by XMM-NewtonWe present the first X-ray observation of Jupiter by XMM-Newton. Images taken with the EPIC cameras show prominent emission, essentially all confined to the 0.2-2.0 keV band, from the planet s auroral spots; their spectra can be modelled with a combination of unresolved emission lines of highly ionised oxygen (OW and O W) , and a pseudo-continuum which may also be due to the superposition of many weak lines. A 2.8 enhancement in the RGS spectrum at 21-22 A (-0.57 keV) is consistent with an O W identification. Our spectral analysis supports the hypothesis that Jupiter s auroral emissions originate from the capture and acceleration of solar wind ions in the planet s magnetosphere, followed by X-ray production by charge exchange. The X-ray flux of the North spot is modulated at Jupiter s rotation period. We do not detect evidence for the -45 min X-ray oscillations observed by C W r u more than two years earlier. Emission from the equatorial regions of the planet s disk is also observed. Its spectrum is consistent with that of scattered solar X-rays.
Document ID
20040065990
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Branduardi-Raymont, G.
(Mullard Space Science Lab. Dorking, United Kingdom)
Elsner, R. F.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gladstone, G. R.
(Southwest Research Inst. San Antonio, TX, United States)
Ramsay, G.
(Mullard Space Science Lab. Dorking, United Kingdom)
Rodriquez, P.
(XMM-Newton SOC Madrid, Spain)
Soria, R.
(Mullard Space Science Lab. Dorking, United Kingdom)
Waite, J. H., Jr.
(Michigan Univ. Ann Arbor, MI, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Astronomy
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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