Description of a Procedure to Analyze EUV Loops

Details Description of a Procedure to Analyze EUV Loops Description of a Procedure to Analyze EUV Loops

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001soph..199...97z&link_type=abstract

Solar Physics, v. 199, Issue 1, p. 97-105 (2001).

Physics

1

Scientific paper

We have developed an IDL procedure to analyze spatial and time evolution of loops observed in the outer solar atmosphere by EUV instruments. The use of this procedure, based on the assumption that loop portions have cylindrical symmetry, allows automatic processing of sequences of images. Our work mainly aims to describe spatial and temporal variations of brightness along the loop length and to determine the following physical parameters: emission measure EM, electron density N_e, pressure P, thermal energy E_th, radiative cooling time τ_rad, and conductive cooling time τ_cond. In this paper we describe an application of this procedure to a sequence of TRACE images at 171 Å, in order to study loop interaction during a flare that occurred in AR 8421 on 29 December 1998 at 09:41 UT.

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