Association of mid-infrared solar plages with calcium K line emissions and magnetic structures

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dc.contributor.authorMarcon R.
dc.contributor.authorKaufmann P.
dc.contributor.authorMelo A.M.
dc.contributor.authorKudaka A.S.
dc.contributor.authorTandberg-Hanssen E.
dc.date.accessioned2024-03-13T01:38:32Z
dc.date.available2024-03-13T01:38:32Z
dc.date.issued2008
dc.description.abstractSolar mid-IR observations in the 8-15 μm 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. © 2008. The Astronomical Society of the Pacific. All rights reserved.
dc.description.firstpage16
dc.description.issuenumber863
dc.description.lastpage19
dc.description.volume120
dc.identifier.doi10.1086/525058
dc.identifier.issn0004-6280
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37575
dc.relation.ispartofPublications of the Astronomical Society of the Pacific
dc.rightsAcesso Aberto
dc.titleAssociation of mid-infrared solar plages with calcium K line emissions and magnetic structures
dc.typeArtigo
local.scopus.citations7
local.scopus.eid2-s2.0-49249110969
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=49249110969&origin=inward
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