Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh24a..05c&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH24A-05
Physics
2100 Interplanetary Physics, 2101 Coronal Mass Ejections (7513), 2111 Ejecta, Driver Gases, And Magnetic Clouds, 2134 Interplanetary Magnetic Fields
Scientific paper
Small-scale flux ropes have been observed in the solar wind at 1 AU with the WIND and ACE spacecraft and one event was observed at 5AU with Ulysses. These magnetic structures are similar to magnetic clouds and can be modeled with a constant-alpha force-free, cylindrically symmetric flux rope. They differ from magnetic clouds in that they have durations on the order of minutes up to a few hours, they lack an expansion signature, and they do not have a depressed proton temperature compared to the surrounding solar wind plasma. Magnetic clouds have been observed at several heliospheric distances and latitudes. There have been no systematic surveys for small-scale flux ropes at different heliospheric distances and latitudes. We will present a comprehensive small-scale flux rope survey between 1 and 5 AU using the Helios, PVO, WIND, ACE and Ulysses spacecraft to examine their occurrence frequency, properties and evolution.
Cartwright M. L.
Moldwin Mark B.
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