Latest results on Jovian disk X-rays from XMM-Newton

Branduardi-Raymont, G. ; Bhardwaj, A. ; Elsner, R. F. ; Gladstone, G. R. ; Ramsay, G. ; Rodriguez, P. ; Soria, R. ; Waite Jr., J. H. ; Cravens, T. E. (2007) Latest results on Jovian disk X-rays from XMM-Newton Planetary and Space Science, 55 (9). pp. 1126-1134. ISSN 0032-0633

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We present the results of a spectral study of the soft X-ray emission (0.2-2.5 keV) from low-latitude ('disk') regions of Jupiter. The data were obtained during two observing campaigns with XMM-Newton in April and November 2003. While the level of the emission remained approximately the same between April and the first half of the November observation, the second part of the latter shows an enhancement by about 40% in the 0.2-2.5 keV flux. A very similar, and apparently correlated increase, in time and scale, was observed in the solar X-ray and EUV flux. The months of October and November 2003 saw a period of particularly intense solar activity, which appears reflected in the behavior of the soft X-rays from Jupiter's disk. The X-ray spectra, from the XMM-Newton EPIC CCD cameras, are all well fitted by a coronal model with temperatures in the range 0.4-0.5 keV, with additional line emission from Mg XI (1.35 keV) and Si XIII (1.86 keV): these are characteristic lines of solar X-ray spectra at maximum activity and during flares. The XMM-Newton observations lend further support to the theory that Jupiter's disk X-ray emission is controlled by the Sun, and may be produced in large part by scattering, elastic and fluorescent, of solar X-rays in the upper atmosphere of the planet.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Planets; Jupiter; X-rays
ID Code:2479
Deposited On:08 Oct 2010 07:03
Last Modified:17 May 2011 06:07

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