Solar atmospheric model with spicules applied to radio observation

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dc.contributor.authorSelhorst C.L.
dc.contributor.authorSilva A.V.R.
dc.contributor.authorCosta J.E.R.
dc.date.accessioned2024-03-13T01:44:06Z
dc.date.available2024-03-13T01:44:06Z
dc.date.issued2005
dc.description.abstractAn atmospheric model was constructed in order to reproduce quantitatively the observations at 17 GHz from Nobeyama Radio Heliograph, namely the brightness temperature at disk center (from 1.4 to 400 GHz), center-to-limb brightening distribution, and radius derived from 17 GHz solar maps. The two dimensional solar atmospheric model, that takes into account the curvature of the Sun, includes spicules, which physical characteristics (such as size, temperature, density, position, and inclination angle) were randomly attributed. After the interferometer instrumental response is taken into account, the results showed than an atmospheric model without spicules produces 36% of limb brightening, approximately the value observed at the solar poles. However, the inferred solar radius from the model (970″) was 6″ smaller than the mean value derived from the solar maps. An improvement of the model is made by including spicules. Results from this upgraded model showed that depending on their physical parameters, limb brightening and solar radius values are obtained in agreement with the radio observations (except for polar regions). © ESO 2005.
dc.description.firstpage365
dc.description.issuenumber1
dc.description.lastpage374
dc.description.volume433
dc.identifier.doi10.1051/0004-6361:20042043
dc.identifier.issn0004-6361
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37878
dc.relation.ispartofAstronomy and Astrophysics
dc.rightsAcesso Aberto
dc.subject.otherlanguageSun: atmosphere
dc.subject.otherlanguageSun: chromosphere
dc.subject.otherlanguageSun: corona
dc.subject.otherlanguageSun: photosphere
dc.subject.otherlanguageSun: radio radiation
dc.titleSolar atmospheric model with spicules applied to radio observation
dc.typeArtigo
local.scopus.citations45
local.scopus.eid2-s2.0-15844400119
local.scopus.subjectSolar atmospheric model
local.scopus.subjectSun: atmosphere
local.scopus.subjectSun: chromosphere
local.scopus.subjectSun: corona
local.scopus.subjectSun: photosphere
local.scopus.subjectSun: radio radiation
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=15844400119&origin=inward
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