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Type: Artigo de periódico
Title: Fast Mid-IR Flashes Detected During Small Solar X-Ray Bursts
Author: Cassiano, MM
Kaufmann, P
Marcon, R
Kudaka, AS
Marun, A
Godoy, R
Pereyra, P
Melo, AM
Levato, H
Abstract: Solar observations in the mid-infrared 8 -aEuro parts per thousand 14 mu m band continuum were carried out with cadence of 5 frames per second, in December 2007. Rapid small heated sources, with a typical duration of the order of seconds, were found on the bright plage-like areas around sunspots, in association with relatively weak GOES soft X-ray bursts. This work presents the analysis of fast mid-infrared flashes detected during a GOES B2.0-class event on 10 December 2007, beginning at about 10:40 UT. Rapid brightness temperature enhancements of 0.5 to 2.0 K were detected at the Earth by a microbolometer array, using a telescope with 10.5 cm diameter aperture producing a diffraction-limited photometric beam of 25 arc sec. The minimum detectable temperature change was of 0.1 K. The corresponding fluxes are 30 -aEuro parts per thousand 130 solar flux units. At the solar surface the estimated rapid brightenings represented a temperature enhancement of 50 -aEuro parts per thousand 150 K.
Subject: Mid-IR solar flares
IR solar flashes
Solar flares
Mid-IR plages
10 mu m continuum flare emissions
Country: Holanda
Editor: Springer
Citation: Solar Physics. Springer, v. 264, n. 1, n. 71, n. 79, 2010.
Rights: fechado
Identifier DOI: 10.1007/s11207-010-9564-x
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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