TY - JOUR
T1 - APERIODIC ION TEMPERATURE VARIATIONS IN THE IO PLASMA TORUS.
AU - Eviatar, Aharon
AU - Mekler, Yuri
PY - 1984
Y1 - 1984
N2 - The paper considers the observed aperiodic variations of S III temperature reported by ground-based observers, which take place on time scales short in comparison with the radiation and electron collision relaxation times. It is suggested that ion-ion charge exchange processes are responsible for the heating, and ion-atom collisions are the source of the cooling. The fluctuations are attributed to random strong variations in the output of neutral matter from the volcanoes and surface of Io. Freshly ionized sulfur that will have near full corotation gyroenergy will undergo charge exchange with thermal doubly ionized sulfur and oxygen, thus producing hot S III. Newly injected neutral atoms can cool the ambient hot plasma by collisions on a time scale comparable to their lifetime against ionization processes.
AB - The paper considers the observed aperiodic variations of S III temperature reported by ground-based observers, which take place on time scales short in comparison with the radiation and electron collision relaxation times. It is suggested that ion-ion charge exchange processes are responsible for the heating, and ion-atom collisions are the source of the cooling. The fluctuations are attributed to random strong variations in the output of neutral matter from the volcanoes and surface of Io. Freshly ionized sulfur that will have near full corotation gyroenergy will undergo charge exchange with thermal doubly ionized sulfur and oxygen, thus producing hot S III. Newly injected neutral atoms can cool the ambient hot plasma by collisions on a time scale comparable to their lifetime against ionization processes.
UR - http://www.scopus.com/inward/record.url?scp=0021386491&partnerID=8YFLogxK
U2 - 10.1029/JA089iA03p01496
DO - 10.1029/JA089iA03p01496
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AN - SCOPUS:0021386491
VL - 89
SP - 1496
EP - 1500
JO - Journal of Geophysical Research C: Oceans
JF - Journal of Geophysical Research C: Oceans
SN - 0148-0227
IS - A3
ER -