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• W3105891330 startingPage "56" @default.
• W3105891330 abstract "Solar flares involve impulsive energy release, which results in enhanced radiation over a broad spectral range and a wide range of heights. In particular, line emission from the chromosphere can provide critical diagnostics of plasma heating processes. Thus, a direct comparison between high-resolution spectroscopic observations and advanced numerical modeling results could be extremely valuable, but has not yet been attempted. In this paper, we present in this paper such a self-consistent investigation of an M3.0 flare observed by the Dunn Solar Telescope's Interferometric Bi-dimensional Spectrometer (IBIS) on 2011 September 24 which we have modeled with the radiative hydrodynamic code RADYN. We obtained images and spectra of the flaring region with IBIS in H$alpha$ 6563 AA and Ca II 8542 AA, and with the Reuven Ramaty High Energy Solar Spectroscope Imager (RHESSI) in X-rays. The latter observations were used to infer the non-thermal electron population, which was passed to RADYN to simulate the atmospheric response to electron collisional heating. We then synthesized spectral lines and compared their shapes and intensities to those observed by IBIS and found a general agreement. In particular, the synthetic Ca II 8542 AA profile fits well to the observed profile, while the synthetic H$alpha$ profile is fainter in the core than for the observation. This indicates that H$alpha$ emission is more responsive to the non-thermal electron flux than the Ca II 8542 AA emission. We suggest that it is necessary to refine the energy input and other processes is necessary to resolve this discrepancy." @default.
• W3105891330 created "2020-11-23" @default.
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• W3105891330 date "2015-04-30" @default.
• W3105891330 modified "2023-10-18" @default.
• W3105891330 title "SOLAR FLARE CHROMOSPHERIC LINE EMISSION: COMPARISON BETWEEN IBIS HIGH-RESOLUTION OBSERVATIONS AND RADIATIVE HYDRODYNAMIC SIMULATIONS" @default.
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• W3105891330 doi "https://doi.org/10.1088/0004-637x/804/1/56" @default.
• W3105891330 hasPublicationYear "2015" @default.
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