Physics
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..20.2313w&link_type=abstract
Advances in Space Research, Volume 20, Issue 12, p. 2313-2318.
Physics
14
Scientific paper
We investigate the forms of the solar driver which cause the destabilization of helmet streamers. Two forms of solar drivers are considered; (i) emergence of a flux-rope from sub-photospheric levels and (ii) application of a photospheric shear motion to a streamer-flux rope system. Numerical results showed that both cases exhibit the characteristics of commonly observed coronal mass ejections (CMEs), but the propagation speed of the CME is higher than the background solar wind speed when the solar driver is the emerging magnetic flux and is the same as the solar wind speed when the photospheric shear is used as the solar driver. The energy constraint allowing the magnetic field transition from a closed to an open configuration is also addressed.
Guo Wei-Ping
Wu Shi Tsan
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