Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45..381s&link_type=abstract
Acta Astronomica Sinica, vol. 45, no. 4, p. 381-388
Astronomy and Astrophysics
Astronomy
Sun: Coronal Mass Ejection, Magnetic Fields, Sun: Activity, Solar Wind, Interplanetary Medium
Scientific paper
Magnetic clouds are the manifestation of coronal mass ejections propagating and expanding in the interplanetary medium. The average duration of magnetic clouds is about 20~30 hours and usually the magnetic field configuration of a magnetic cloud can be well described by a magnetic flux rope structure. Recently, Moldwin et al. reported several small-scale magnetic flux ropes identified from solar wind observations and suggested that the size distribution of solar wind magnetic flux ropes might be a bimodal one. In opposition to Moldwin, after a systematical survey of the data of WIND (from 1995 through 2000) and ACE (from 1998 through 2000), twenty-eight medium-scale magnetic flux ropes were identified. The existence of these medium-scale magnetic flux ropes suggests that the size distribution of solar wind magnetic flux ropes might be continuous. This result will probably provide an important physical constraint on the origin of solar wind magnetic flux ropes.
Song Q. W.
Wu Dei-Jin
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