A new solar burst spectral component emitting only in the terahertz range

dc.creatorKaufmann, P
dc.creatorRaulin, JP
dc.creatorde Castro, CGG
dc.creatorLevato, H
dc.creatorGary, DE
dc.creatorCosta, JER
dc.creatorMarun, A
dc.creatorPereyra, P
dc.creatorSilva, AVR
dc.creatorCorreia, E
dc.date2004
dc.date40238
dc.date2014-11-14T04:03:25Z
dc.date2015-11-26T16:04:20Z
dc.date2014-11-14T04:03:25Z
dc.date2015-11-26T16:04:20Z
dc.date.accessioned2018-03-28T22:53:26Z
dc.date.available2018-03-28T22:53:26Z
dc.identifierAstrophysical Journal. Univ Chicago Press, v. 603, n. 2, n. L121, n. L124, 2004.
dc.identifier0004-637X
dc.identifierWOS:000220300800015
dc.identifier10.1086/383186
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/76345
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/76345
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/76345
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1265456
dc.descriptionSolar flare energy manifestations were believed to be the result of the same kind of particle acceleration. It is generally accepted that a population of relativistic electrons accelerated during the impulsive phase of solar flares produces microwaves by synchrotron losses in the solar magnetic field and X-rays by collisions in denser regions of the solar atmosphere. We report the discovery of a new intense solar flare spectral radiation component, peaking somewhere in the shorter submillimeter to far-infrared range, identified during the 2003 November 4 large flare. The new solar submillimeter telescope, designed to extend the frequency range to above 100 GHz, detected this new component with increasing fluxes between 212 and 405 GHz. It appears along with, but is separated from, the well-known gyrosynchrotron emission component seen at microwave frequencies. The novel emission component had three major peaks with time, originated in a compact source whose position remained remarkably steady within 15'. Intense subsecond pulses are superposed with excess fluxes also increasing with frequency and amplitude increasing with the pulse repetition rate. The origin of the terahertz emission component during the flare impulsive phase is not known. It might be representative of emission due to electrons with energies considerably larger than the energies assumed to explain emission at microwaves. This component can attain considerably larger intensities in the far-infrared, with a spectrum extending to the white-light emission observed for that flare.
dc.description603
dc.description2
dc.description2
dc.descriptionL121
dc.descriptionL124
dc.languageen
dc.publisherUniv Chicago Press
dc.publisherChicago
dc.publisherEUA
dc.relationAstrophysical Journal
dc.relationAstrophys. J.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectplasmas
dc.subjectradiation mechanisms : nonthermal
dc.subjectsubmillimeter
dc.subjectSun : flares
dc.subjectSun : infrared
dc.subjectSun : radio radiation
dc.subjectX-rays
dc.subjectFlares
dc.subjectFrequency
dc.subjectContinuum
dc.subjectRadiation
dc.subjectTime
dc.subjectHard
dc.titleA new solar burst spectral component emitting only in the terahertz range
dc.typeArtículos de revistas


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