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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Solar wind effects on Jupiter non-Io DAM emissions during Ulysses distant encounter (2003-2004)

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Author(s):
Echer, E. [1] ; Zarka, P. [2] ; Gonzalez, W. D. [1] ; Morioka, A. [3] ; Denis, L. [4]
Total Authors: 5
Affiliation:
[1] Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos, SP - Brazil
[2] Observ Paris, Meudon - France
[3] Tohoku Univ, Planetary Plasma & Atmospher Res Ctr, Sendai, Miyagi 980 - Japan
[4] Observ Paris, Stn Radioastron, Nancay - France
Total Affiliations: 4
Document type: Journal article
Source: Astronomy & Astrophysics; v. 519, SEP 2010.
Web of Science Citations: 12
Abstract

Aims. We analyze solar wind data from the Ulysses spacecraft during the distant Jupiter encounter from 2003 November to 2004 March as well as Nancay decametric (DAM) radio observations non-controlled by Io. Methods. The Ulysses solar wind data are balistically propagated towards Jupiter and are correlated with Nancay non-Io DAM emissions. Results. It is found that the average solar wind dynamic pressure around the time of DAM emissions is 1.7 times higher than its average value during the Ulysses encounter. The occurrence of fast forward (FS) and reverse (RS) interplanetary shocks and heliospheric current sheet crossings (HCS) is correlated with the occurrence of non-Io DAM emissions. We note an enhanced probability of occurrence of non-Io DAM emissions after the expected arrival of FS, RS and HCS at Jupiter. However, about half emissions (54%) did not seem to be associated with these interplanetary structures. We also note that the average duration and power of non-Io DAM emissions are enhanced during periods associated with those interplanetary structures. Conclusions. From the results obtained in this work it seems that non-Io DAM emissions occur during intervals of enhanced solar wind dynamic pressure. Yet, there is no direct correlation between the non-Io DAM emissions duration or power versus the solar wind pressure values and the interplanetary shock Mach number. (AU)

FAPESP's process: 08/06650-9 - Study of geoeffective interplanetary structures during intense geomagnetic storms and substorms
Grantee:Walter Demetrio Gonzalez Alarcon
Support Opportunities: Regular Research Grants