E. Antonucci et al., SIMULATIONS OF THE CA-XIX SPECTRAL EMISSION FROM A FLARING SOLAR CORONAL LOOP .2. IMPULSIVE HEATING BY ACCELERATED ELECTRONS, The Astrophysical journal, 413(2), 1993, pp. 786-797
In this paper we analyze the response of the plasma inside a coronal l
oop to the passage of a beam of accelerated electrons and study it sys
tematically as a function of the parameters and temporal profile of th
e beam, as well as of the initial conditions of the corona. Our approa
ch consists in computing the spectral emission from an impulsively hea
ted loop in the Ca xix line complex in the range 3.165-3.231 angstrom
and in analyzing the simulated spectra with the same technique used fo
r the observations. This allows a direct comparison of the simulations
with the results of the spectral observations of the Bent Crystal Spe
ctrometer on board the Solar Maximum Mission. While in some cases the
values and evolution of average plasma properties, as derived from the
analysis of spectra, are reproduced with good accuracy, the detailed
shape of the Ca XIX lines cannot be accurately reproduced by this kind
of model of flares heated by nonthermal electron beams.