Artículos de revistas
Fast Mid-IR Flashes Detected During Small Solar X-Ray Bursts
Fecha
2010-06Registro en:
Cassiano, Marta M.; Kaufmann, Pierre; Marcon, Rogério; Kudaka, Amauri S.; Marun, Adolfo Hector; et al.; Fast Mid-IR Flashes Detected During Small Solar X-Ray Bursts; Springer; Solar Physics; 264; 1; 6-2010; 71-79
0038-0938
Autor
Cassiano, Marta M.
Kaufmann, Pierre
Marcon, Rogério
Kudaka, Amauri S.
Marun, Adolfo Hector
Godoy, Rodolfo Alfredo
Pereyra, Pablo Florencio
Melo, Arline M.
Levato, Orlando Hugo
Resumen
Solar observations in the mid-infrared 8-14 mum band continuum were carried out with cadence of 5 frames per second, in December 2007. Rapid small heated sources, with 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 field-of-view of 25 arcsec. Minimum detectable temperature change was of 0.1 K. The corresponding fluxes are 30-130 solar flux units. At the solar surface the estimated rapid brightenings were of 50-150 K.