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Titolo:
Interaction of a strong interplanetary shock with the termination shock
Autore:
Lu, JY; Whang, YC; Burlaga, LF;
Indirizzi:
Catholic Univ Amer, Dept Mech Engn, Washington, DC 20064 USA Catholic UnivAmer Washington DC USA 20064 Engn, Washington, DC 20064 USA NASA, Goddard Space Flight Ctr, Extraterr Phys Lab, Greenbelt, MD 20771 USA NASA Greenbelt MD USA 20771 , Extraterr Phys Lab, Greenbelt, MD 20771 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A12, volume: 104, anno: 1999,
pagine: 28249 - 28254
SICI:
0148-0227(199912)104:A12<28249:IOASIS>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRESSURE-BALANCED STRUCTURES; MERGED INTERACTION REGIONS; INTERSTELLAR PICKUP IONS; ANOMALOUS COSMIC-RAYS; SOLAR-WIND; VOYAGER-2 OBSERVATIONS; OUTER HELIOSPHERE; NEUTRAL HYDROGEN; MAGNETIC-FIELD; DISTANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Lu, JY Chinese Acad Sci, Ctr Space & Appl Res, Beijing 100080, Peoples R China Chinese Acad Sci Beijing Peoples R China 100080 , Peoples R China
Citazione:
J.Y. Lu et al., "Interaction of a strong interplanetary shock with the termination shock", J GEO R-S P, 104(A12), 1999, pp. 28249-28254

Abstract

The 1991 global merged interaction region (GMIR) shock is a strong forwardshock observed from Voyager 2 on day 146 of 1991 at 34.6 AU. As the GMIR shock propagated outward in the distant heliosphere, it eventually encounters the termination shock. We study the interaction of the GMIR shock with the termination shock taking into account the influence of interstellar pickup protons on the solar wind and the shocks. Because the location of the termination shock is an unknown parameter, it remains uncertain about when andwhere the GMIR shock penetrates through the termination shock. This paper carries out calculations for the interaction to take place over a wide range of possible locations between 70 and 110 AU. The interaction can significantly modify the conditions of both shocks. For the GMIR shock, the interaction can cause a decrease of the shock speed by similar to 120 km/s, a decrease of the shock Mach number from similar to 1.9 to similar to 1.4, and a decrease of the shock strength from similar to 2.2 to similar to 1.6. For the termination shock, the interaction can cause an increase of the shock speed by similar to 95 km/s, a decrease of the shock Mach number from similarto 3.6 to similar to 2.6, and a decrease of the shock strength from similar to 3.2 to similar to 2.8.

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Documento generato il 28/09/20 alle ore 21:36:05