Physics
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..701b&link_type=abstract
The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 701-704 (1999).
Physics
Interplanetary Physics
Scientific paper
We study the forward transient shocks observed by Ulysses near the ecliptic plane during the interval from October 1990 to May 1992 in its journey to Jupiter. For 22 of the shocks we have sufficient data from IMP to determine whether they passed also near the Earth or not, and we find that only 13 of the 22 shocks were detected by both spacecfrat. In all these 13 cases, both spacecraft were within the same magnetic sector. We also study 46 ejecta detected by Ulysses in terms of their positions relative to magnetic sectors. We find that the ejecta are frequently located near or at the sector boundary and sometimes in a different magnetic sector than the preceding shock. The results obtained from this limited data set lend support to the idea that shocks form in interplanetary space by a sudden increase in the solar wind speed from a coronal hole, and ejecta are only accompanying structures of the whole process.
Américo González-Esparza J.
Bravo Silvia
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