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Astronomy & Astrophysics manuscript no. (will be inserted by hand later)

Summary: Astronomy & Astrophysics manuscript no.
(will be inserted by hand later)
Modelling of solar explosive events in 2D environments
Part III. Observable consequences
I. Roussev 1;2 , J.G. Doyle 1 , K. Galsgaard 3 , and R. Erd'elyi 4
1 Armagh Observatory, College Hill, Armagh, BT61 9DG, N. Ireland
2 High Altitude Observatory, NCAR, 3450 Mitchell Lane, Boulder, CO 80301, USA
3 School of Mathematics & Statistics, Univ. of St. Andrews, St. Andrews, Fife KY16 9SS, Scotland
4 Space & Atmosphere Research Center, Univ. of Sheffield, Hounsfield Road, Sheffield, S3 7RH, England
emails: ilr@star.arm.ac.uk, jgd@star.arm.ac.uk, klaus@mcs.st­and.ac.uk, Robertus@sheffield.ac.uk
Received date, accepted date
Abstract. We examine the response via line synthesis of two representative transition region lines, namely C iv
1548.2 š A and O vi 1031.9 š A, in various physical environments representing the `quiet' Sun to magnetic reconnection
events. Our calculations of ion populations allow for departures from equilibrium ionization (EI), which is critical
in studies of transient events. Both lines reveal highly blue­ and red­shifted Doppler components, and some
of the results are examined in the context of solar explosive events. The observable consequences of magnetic
reconnection are subtle in the various physical circumstances examined here and differ from one emission line to
another, because of the difference in their formation temperatures.
Key words. MHD -- Sun: atmosphere -- Sun: chromosphere -- Sun: UV radiation -- Sun: magnetic fields -- Line:


Source: Armagh Observatory


Collections: Physics