POlarization Emission of Millimeter Activity at the Sun (POEMAS): New Circular Polarization Solar Telescopes at Two Millimeter Wavelength Ranges

Página do item simplificado
dc.contributor.authorValio A.
dc.contributor.authorKaufmann P.
dc.contributor.authorGimenez de Castro C.G.
dc.contributor.authorRaulin J.-P.
dc.contributor.authorFernandes L.O.T.
dc.contributor.authorMarun A.
dc.date.accessioned2024-03-13T01:04:59Z
dc.date.available2024-03-13T01:04:59Z
dc.date.issued2013
dc.description.abstractWe present a new system of two circular polarization solar radio telescopes, POEMAS, for observations of the Sun at 45 and 90 GHz. The novel characteristic of these instruments is the capability to measure circular right- and left-hand polarizations at these high frequencies. The two frequencies were chosen so as to bridge the gap at radio frequencies between 20 and 200 GHz of solar flare spectra. The telescopes, installed at CASLEO Observatory (Argentina), observe the full disk of the Sun with a half power beam width of 1. 4{ring operator}, a time resolution of 10 ms at both frequencies, a sensitivity of 2 - 4 K that corresponds to 4 and 20 solar flux unit (=104 Jy), considering aperture efficiencies of 50±5 % and 75±8 % at 45 and 90 GHz, respectively. The telescope system saw first light in November 2011 and is satisfactorily operating daily since then. A few flares were observed and are presented here. The millimeter spectra of some flares are seen to rise toward higher frequencies, indicating the presence of a new spectral component distinct from the microwave one. © 2013 Springer Science+Business Media Dordrecht.
dc.description.firstpage651
dc.description.issuenumber2
dc.description.lastpage665
dc.description.volume283
dc.identifier.doi10.1007/s11207-013-0237-4
dc.identifier.issn0038-0938
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36634
dc.relation.ispartofSolar Physics
dc.rightsAcesso Restrito
dc.subject.otherlanguageFlares
dc.subject.otherlanguagePolarization: radio
dc.subject.otherlanguageRadio bursts: microwaves (mm, cm)
dc.subject.otherlanguageRadio emission
dc.titlePOlarization Emission of Millimeter Activity at the Sun (POEMAS): New Circular Polarization Solar Telescopes at Two Millimeter Wavelength Ranges
dc.typeArtigo
local.scopus.citations13
local.scopus.eid2-s2.0-84874986962
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84874986962&origin=inward
Arquivos
Coleções
Artigos de periódico