@Article{CuambeCostSimõ:2018:FlPaIn,
author = "Cuambe, Valente A. and Costa, Joaquim Eduardo Rezende and
Sim{\~o}es, P. J. A.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {University of
Glasgow}",
title = "Flare parameters inferred from a 3D loop model data base",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2018",
volume = "477",
pages = "1508--1519",
month = "June",
keywords = "Sun: activity, Sun: flares, Sun: magnetic field, Sun: radio
radiation.",
abstract = "We developed a data base of pre-calculated flare images and
spectra exploring a set of parameters which describe the physical
characteristics of coronal loops and accelerated electron
distribution. Due to the large number of parameters involved in
describing the geometry and the flaring atmosphere in the model
used, we built a large data base of models (similar to 250 000) to
facilitate the flare analysis. The geometry and characteristics of
non-thermal electrons are defined on a discrete grid with spatial
resolution greater than 4 arcsec. The data base was constructed
based on general properties of known solar flares and convolved
with instrumental resolution to replicate the observations from
the Nobeyama radio polarimeter spectra and Nobeyama
radioheliograph (NoRH) brightness maps. Observed spectra and
brightness distribution maps are easily compared with the modelled
spectra and images in the data base, indicating a possible range
of solutions. The parameter search efficiency in this finite data
base is discussed. 8 out of 10 parameters analysed for 1000
simulated flare searches were recovered with a relative error of
less than 20 per cent on average. In addition, from the analysis
of the observed correlation between NoRH flare sizes and
intensities at 17 GHz, some statistical properties were derived.
From these statistics, the energy spectral index was found to be
delta similar to 3, with non-thermal electron densities showing a
peak distribution less than or similar to 10(7) cm(-3), and
B-photosphere greater than or similar to 2000 G. Some bias for
larger loops with heights as great as similar to 2.6 x 10(9) cm,
and looptop events were noted. An excellent match of the spectrum
and the brightness distribution at 17 and 34 GHz of the 2002 May
31 flare is presented as well.",
doi = "10.1093/mnras/sty867",
url = "http://dx.doi.org/10.1093/mnras/sty867",
issn = "0035-8711 and 1365-2966",
language = "en",
targetfile = "cuambe_flare.pdf",
urlaccessdate = "18 abr. 2024"
}