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

The aim of the present study is to investigate the reconnection jets formed during the process of magnetic flux cancellation in the physical environme nt of the solar transition region. The emission properties of these jets ar e then computed for two resonance transition region lines, C IV 1548.2 Angs trom and O VI 1031.9 Angstrom, under the assumption of non-equilibrium ioni zation. The numerical modelling involves 2-dimensional (2D) dissipative, ra diative, 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 wor k is a continuation of previous related simulations where small-scale energ y depositions were modelled in 1D radiative hydrodynamics. Having an X-poin t reconnection in the mid-transition region gives blue-shifts of the order of similar to 100 km s(-1), however, the red-shift can be up to one order o f magnitude less.