Explosive Events in The Transition Region
Since the observations by Bartoc (Apj 198?) is has been evident that events occur in
the transition region which initiates high velocity plasma motions. These are frequently
observed in transition region lines. Many studies have been made to understand
such phenomena, and to days consensus is that the high velocity jets are generated by magnetic
reconnection taking place in the transition region. Until now models have been made that
either were 1D HD models from which transition region line profiles were generated or 2D
MHD reconnection events without sufficient complications in either the physical model or the
attempts to derive observational properties. We have tried to expand the 2D MHD reconnection
model by taking into account a simple transition region,
isotropic heat conduction and optical thin radiation. Data from the 2D MHD experiments
are then used to analyse the appearance of transition line profiles taking into account
deviations from (???? ILIA's). This is required as the dynamical time scales in the
dynamics of the reconnection event takes place on a time scale much shorter than
recombination time scale for the investigated transition region lines.
We find that the physical environment has a significant influence on the characteristics
of the reconnection event and that the only in some cases can we generate line
profiles that have some resemblance to the observed line profiles.
Papers
- Modelling of Explosive Events in a 2D Environment: Part I. General Reconnection Jet Dynamics, A&A accepted January 2001
- Modelling of Explosive Events in a 2D Environment: Part II. Various MHD Experiments, A&A submitted February 2001
- Modelling of Explosive Events in a 2D Environment: Part III. Line Synthesis, A&A submitted February 2001
Last updated 03.03.01