Modelling of explosive events in the solar transition region in a 2D environment. I. General reconnection jet dynamics

Details Modelling of explosive events in the solar transition region in a 2D environment. I. General reconnection jet dynamics Modelling of explosive events in the solar transition region in a 2D environment. I. General reconnection jet dynamics

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...370..298r&link_type=abstract

Astronomy and Astrophysics, v.370, p.298-310 (2001)

Astronomy and Astrophysics

Astrophysics

41

Mhd, Sun: Atmosphere, Sun: Chromosphere, Sun: Uv Radiation, Sun: Magnetic Fields

Scientific paper

The aim of the present study is to investigate the reconnection jets formed during the process of magnetic flux cancellation in the physical environment of the solar transition region. The emission properties of these jets are then computed for two resonance transition region lines, C iv 1548.2 Å and O vi 1031.9 Å, under the assumption of non-equilibrium ionization. The numerical modelling involves 2-dimensional (2D) dissipative, radiative, nonlinear magnetohydrodynamics. The nonlinear anisotropic thermal conduction, radiative losses, and volumetric heating are taken into account in order to assess their role in the physical situation examined. This work is a continuation of previous related simulations where small-scale energy depositions were modelled in 1D radiative hydrodynamics. Having an X-point reconnection in the mid-transition region gives blue-shifts of the order of ~ 100 km s-1, however, the red-shift can be up to one order of magnitude less.

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