A Filament-Associated Halo Coronal Mass Ejection
Nariaki Nitta1; Zhang Jun2; Wang Jingxiu2
Source PublicationChinese Journal of Astronomy and Astrophysics
AbstractThere are only a few observations published so far that show the initiation of a coronal mass ejection (CME) and illustrate the magnetic changes in the surface origin of a CME. Any attempt to connect a CME with its local solar activities is meaningful. In this paper we present a clear instance of a halo CME initiation. A careful analysis of magnetograms shows that the only obvious magnetic changes in the surface region of the CME is a magnetic flux cancellation underneath a quiescent filament. The early disturbance was seen as the slow upward motion in segments of the quiescent filament. Four hours later, the filament was accelerated to about 50 km s(-1) and erupted. While a small part of the material in the filament was ejected into the upper corona, most of the mass was transported to a nearby region. About forty minutes later, the transported mass was also ejected partially to the upper corona. The eruption of the filament triggered a two-ribbon flare, with post-flare loops connecting the flare ribbons. A halo CME, which is inferred to be associated with the eruptive filament, was observed from LASCO/C2 and C3. The halo CME contained two CME events, each event corresponded to a partial mass ejection of the filament. We suggest that the magnetic reconnection at the lower atmosphere is responsible for the filament eruption and the halo CME.
Document Type期刊论文
Affiliation1.Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto
Recommended Citation
GB/T 7714
Nariaki Nitta,Zhang Jun,Wang Jingxiu. A Filament-Associated Halo Coronal Mass Ejection[J]. Chinese Journal of Astronomy and Astrophysics,2001,1(1):85.
APA Nariaki Nitta,Zhang Jun,&Wang Jingxiu.(2001).A Filament-Associated Halo Coronal Mass Ejection.Chinese Journal of Astronomy and Astrophysics,1(1),85.
MLA Nariaki Nitta,et al."A Filament-Associated Halo Coronal Mass Ejection".Chinese Journal of Astronomy and Astrophysics 1.1(2001):85.
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