Chromospheric Magnetic Reconnection caused by Photospheric Flux Emergence: Implications for Jet-like Events Formation |
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Jiaoyang Ding Submitted: 2009-12-23 05:52
Magnetic reconnection in the low atmosphere, e.g. chromosphere, is investigated
in various physical environments. Its implications for the origination of explosive
events (small-scale jets) are discussed.
A 2.5-dimensional resistive magnetohydrodynamic (MHD) model in Cartesian coordinates is used. It is found that the temperature and velocity of the outflow jets as a result of magnetic reconnection are strongly dependent on the physical
environments, e.g. the magnitude of the magnetic field strength and the plasma density. If the magnetic field strength is weak and the density is high, the
temperature of the jets is very low (~10,000 K) as well as its velocity (~40 km s-1). However, if environments with stronger magnetic field strength (40~G) and smaller density (electron density N_e=2 imes 1010~cm-3)
are considered, the outflow jets reach higher
temperatures of up to 600,000 K and a line-of-sight velocity of up to 130 km s-1 which is comparable with the observational values of jet-like events.
Authors: J. Y. Ding, M. S. Madjarska, J. G. Doyle , and Q. M. Lu
Projects: None
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Publication Status: accepted (A&A)
Last Modified: 2009-12-28 08:25
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