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Type: Artigo de periódico
Title: Association of mid-infrared solar plages with calcium K line emissions and magnetic structures
Author: Marcon, R
Kaufmann, P
Melo, AM
Kudaka, AS
Tandberg-Hanssen, E
Abstract: Solar mid-IR observations in the 8-15 mu m band continuum with moderate angular resolution (18 '') reveal the presence of bright structures surrounding sunspots. These plage-like features present good association with calcium CaII K1v plages and active region magnetograms. We describe a new optical setup with reflecting mirrors to produce solar images on the focal-plane array of uncooled bolometers of a commercial camera preceded by germanium optics. First observations of a sunspot on 2006 September 11 show a mid-IR continuum plage exhibiting spatial distribution closely associated with CaII K1v line plage and magnetogram structures. The mid-IR continuum bright plage is about 140 K hotter than the neighboring photospheric regions, consistent with hot plasma confined by the magnetic spatial structures in and above the active region.
Country: EUA
Editor: Univ Chicago Press
Citation: Publications Of The Astronomical Society Of The Pacific. Univ Chicago Press, v. 120, n. 863, n. 16, n. 19, 2008.
Rights: fechado
Identifier DOI: 10.1086/525058
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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