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Titolo:
A new perspective concerning the influence of the solar wind on the Jovianmagnetosphere
Autore:
Southwood, DJ; Kivelson, MG;
Indirizzi:
Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A4, volume: 106, anno: 2001,
pagine: 6123 - 6130
SICI:
0148-0227(20010401)106:A4<6123:ANPCTI>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUBBLE-SPACE-TELESCOPE; IO FLUX TUBE; ULYSSES OBSERVATIONS; OUTER MAGNETOSPHERE; JUPITER AURORA; MAGNETIC-FIELD; UV AURORA; ULTRAVIOLET; FOOTPRINT; VOYAGER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Southwood, DJ Univ Calif Los Angeles, Inst Geophys & Planetary Phys, 6843 Slichter Hall,405 Hilgard Ave, Los Angeles, CA 90095 USA Univ Calif Los Angeles 6843 Slichter Hall,405 Hilgard Ave Los Angeles CA USA 90095
Citazione:
D.J. Southwood e M.G. Kivelson, "A new perspective concerning the influence of the solar wind on the Jovianmagnetosphere", J GEO R-S P, 106(A4), 2001, pp. 6123-6130

Abstract

The solar wind exerts a strong influence on the Jovian magnetosphere in changing its volume, in energizing plasma, and in stimulating the aurora and a host of other associated effects. However, whereas at Earth the dominant solar terrestrial coupling process is magnetic reconnection, the dominant energy reservoir in Jupiter's magnetospheric plasma, continually present, isthe kinetic energy of its rotating plasma disk. This "flywheel"' produces effects with no terrestrial analogy, some of which we describe here. The most surprising prediction from the analysis of this paper is that remotely sensed symptoms of Jovian magnetospheric activity are likely to occur in conjunction with solar wind pressure decreases. Compressions of the magnetosphere produced by forward shocks and other solar wind pressure increases willheat the magnetospheric plasma but substantially reduce the ionosphere-magnetosphere current systems. The intensity of dayside aurora and of radio wave emissions associated with increased ionospheric-magnetospheric current systems will tend to anticorrelate with magnetospheric compressions and correlate with expansions. The link to the aurora is based on an argument that the auroral zone maps to the plasma disk of the middle magnetosphere and isthus linked to plasma sheet dynamics. The effect of expansion on the plasma sheet is to increase the parallel pressure, setting up conditions that can produce detached plasma "blobs" and enhance mass loss. The analysis is particularly apposite in light of the opportunities for observing Solar wind-Jovian interactions using data from both the Galileo and the Cassini spacecraft during the Cassini flyby of Jupiter in late 2000, ideally supplementedby auroral imaging with ground-based and Hubble telescopes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 12:27:42