Volume 510, February 2010
|Number of page(s)||9|
|Published online||18 February 2010|
Chromospheric magnetic reconnection caused by photospheric flux emergence: implications for jet-like events formation
Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland e-mail: firstname.lastname@example.org
2 School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China
Accepted: 17 December 2009
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 (~104 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 cm-3) are considered, the outflow jets reach higher temperatures of up to 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.
Key words: magnetohydrodynamics (MHD) / Sun: chromosphere / Sun: transition region / Sun: UV radiation / magnetic fields
© ESO, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.