ORBi: Bhardwaj A. - Auroral and Non-auroral X-ray Emissions from Jupiter: A Comparative View

Reference : Auroral and Non-auroral X-ray Emissions from Jupiter: A Comparative View


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/97486

Title :	Auroral and Non-auroral X-ray Emissions from Jupiter: A Comparative View
Language :	English
Author, co-author :	Bhardwaj, A. [> > > >]
	Elsner, R. [> > > >]
	Gladstone, R. [> > > >]
	Waite, H. [> > > >]
	Lugaz, N. [> > > >]
	Cravens, T. [> > > >]
	Branduardi-Raymont, G. [> > > >]
	Ramsay, G. [> > > >]
	Soria, R. [> > > >]
	Ford, P. [> > > >]
	Rodriguez, P. [> > > >]
	Majeed, T. [> > > >]
	Grodent, Denis [ > > ]
Publication date :	2004
Peer reviewed :	No
On invitation :	No
Audience :	International
Event name :	American Geophysical Union Fall Meeting 2004
Event date :	13-17 December, 2004
Event place (city) :	San Francisco
Event country :	CA
Keywords :	[en] 7554 X rays ; gamma rays ; and neutrinos ; 6220 Jupiter ; 2455 Particle precipitation ; 0310 Airglow and aurora ; 0343 Planetary atmospheres (5405 ; 5407 ; 5409 ; 5704 ; 5705 ; 5707)
Abstract :	[en] Jovian X-rays can be broadly classified into two categories: (1) "auroral" emission, which is confined to high-latitudes ( ˜>60° ) at both polar regions, and (2) "dayglow" emission, which originates from the sunlit low-latitude ( ˜<50° ) regions of the disk (hereafter called "disk" emissions). Recent X-ray observations of Jupiter by Chandra and XMM-Newton have shown that these two types of X-ray emission from Jupiter have different morphological, temporal, and spectral characteristics. In particular: 1) contrary to the auroral X-rays, which are concentrated in a spot in the north and in a band that runs half-way across the planet in the south, the low-latitude X-ray disk is almost uniform; 2) unlike the ˜40±20-min periodic oscillations seen in the auroral X-ray emissions, the disk emissions do not show any periodic oscillations; 3) the disk emission is harder and extends to higher energies than the auroral spectrum; and 4) the disk X-ray emission show time variability similar to that seen in solar X-rays. These differences and features imply that the processes producing X-rays are different at these two latitude regions on Jupiter. We will present the details of these and other features that suggest the differences between these two classes of X-ray emissions from Jupiter, and discuss the current scenario of the production mechanism of them.
Permalink :	http://hdl.handle.net/2268/97486
	also: http://hdl.handle.net/2268/94014
Other URL :	http://www.agu.org/meetings/fm04/

There is no file associated with this reference.

All documents in ORBi are protected by a user license.

Dspace v1.5