Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm44b..03z&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM44B-03
Astronomy and Astrophysics
Astrophysics
2716 Energetic Particles: Precipitating, 2723 Magnetic Reconnection (7526, 7835), 2744 Magnetotail, 2788 Magnetic Storms And Substorms (7954), 2790 Substorms
Scientific paper
Plasmoids and/or flux ropes are important feature in various kinds of eruptive processes in astrophysical plasmas, notably in the occurrence of magnetospheric substorm and solar Coronal Mass Ejection (CME). The typical observational signatures of a magnetic structures, e.g. plasmoid, flux rope, BBFs, FTE have been defined in two dimensions by a bipolar perturbation in Bz, accompanied by high-speed plasma flow. The two Double Star and four Cluster spacecraft (six spacecraft) have apogees aligned near the same MLT. A BBF has been observed on Nov. 8, 2004 by the Cluster spacecraft and Double Star satellite. This offers the opportunity to ascertain the evolutional signatures by multiple satellites in the near Earth region of BBF like plasmoid. The BBF (with closed field lines) should preserve the ion composition information where it is formed. The ion composition observed in the BBF shows significantly higher plasma oxygen density than in the ambient plasma environment. This implies heavy ions are involved in the reconnection process where the BBF is formed.
Daly Phil
Dunlop Malcolm
Fritz Tobias
Fu Siqi
Korth Alex
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