Speaker
Dr
YongCun Zhang
(State Key Laboratory of Space Weather, Center for Space Science and Applied Research,Chinese Academy of Sciences)
Description
We report first results of magnetic curvature distribution in the diffusion region
of a unique magnetic reconnection event. This event is exceptional since all four
Cluster spacecraft is crossing the diffusion region. Magnetic curvature analysis
shows that magnetic field lines are sharply curved with high curvature in the
inner outflow regions between the two Hall regions and display nearly coplanar
features of antiparallel reconnection. Combination of the decrease in curvature
radius of magnetic field lines and the increase in electron gyro-radius induces
curvature pitch angle scattering of initially trapped electrons, resulting in an
isotropic electron distribution. In Hall regions, magnetic curvature decreases
corresponding obviously to the presence of Y-directed Hall fields, which implies
that the stress of reconnected field is released here, in agreement with whistler
mediated-reconnection. The value and direction of curvature radius are not well
organized due to the fluctuating Hall fields resulting from the temporal dynamical
reconnection.
Primary author
Dr
YongCun Zhang
(State Key Laboratory of Space Weather, Center for Space Science and Applied Research,Chinese Academy of Sciences)
Co-authors
Dr
Aurelie Marchaudon
(Institut de Recherche en Astrophysique et Planétologie, Université Paul Sabatier (UPS-OMP) et CNRS)
Prof.
Chao Shen
(State Key Laboratory of Space Weather, Center for Space Science and Applied Research,Chinese Academy of Sciences)
Dr
Zhao Jin Rong
(Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences)
Dr
Zhen Xing Liu
(State Key Laboratory of Space Weather, Center for Space Science and Applied Research,Chinese Academy of Sciences)
