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Applications for the sub-milimeter Solar Telescope (SST)

Grant number: 99/06126-7
Support type:Research Projects - Thematic Grants
Duration: October 01, 1999 - May 31, 2007
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Solar System Astronomy
Principal Investigator:Pierre Kaufmann
Grantee:Pierre Kaufmann
Home Institution: Centro de Radioastronomia e Aplicações Espaciais. Universidade Presbiteriana Mackenzie (UPM). Instituto Presbiteriano Mackenzie. São Paulo , SP, Brazil
Associated scholarship(s):04/07835-1 - Bolometric sensors for the THZ band in focal planes of radiation collectors for meteorological and solar applications, BP.DR


The aim of this proposal is to conduct scientific, technological and ambiental researches, using sub-millimeter diagnostic provided by the new Sub-millimeter Solar Telescope (SST) at 212 GHz and 405 GHz. The SST construction has been completed and the instrument has been successfully assembled and tested at its final location at El Leoncito, San Juan, Argentine an Andes. Technological researches will consist to study the behavior of the SST and its sub-systems as a function of local weather parameters, to optimize the reflector performance at 212 and 405 GHz, and to define the observational command parameters with the objective to a flow remote controlled observations in the future. Radio-propagation and radio-meteorological research will be performed by studying the atmosphere effects on submm waves, the determination of the water-vapour content in the atmosphere and its variation with time and local parameters. The search for stratospheric ClO, the main artificial constituent responsible for ozonosphere depletion, is one important objective of ambiental investigations to be carried out by the SST. In solar physics research SST will provide unique information on the explosive component of solar flares, bringing new and fundamental clues for a better understanding of the primary energy release mechanisms. The detection of recombination lines at submm-waves, predicted for the solar atmosphere, will be attempted for the first time. Quiet Sun studies will also be conducted, in particular active region evolution, solar disk brightness, limb brightening, polar darkening and solar diameter measurements. It will be finalized the complementary project of solar optical observations using imaging spectro photometers. SST might become available fornon-solar, nighttime observations at a later phase of present project. (AU)

Scientific publications (8)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CRISTIANI, G.; GIMENEZ DE CASTRO, C. G.; MANDRINI, C. H.; MACHADO, M. E.; ROVIRA, M. G. Asymmetric precipitation in a coronal loop as explanation of a singular observed spectrum. Advances in Space Research, v. 44, n. 11, p. 1314-1320, DEC 1 2009. Web of Science Citations: 2.
CRISTIANI, G.; DE CASTRO, C. G. GIMENEZ; MANDRINI, C. H.; MACHADO, M. E.; DE BENEDETTO E SILVA, I.; KAUFMANN, P.; ROVIRA, M. G. A solar burst with a spectral component observed only above 100 GHz during an M class flare. Astronomy & Astrophysics, v. 492, n. 1, p. 215-222, DEC 2008. Web of Science Citations: 17.
CRISTIANI‚ G.; MARTINEZ‚ G.; MANDRINI‚ CH; GIMÉNEZ DE CASTRO‚ CG; DA SILVA‚ CW; ROVIRA‚ MG; KAUFMANN‚ P. Spatial characterization of a flare using radio observations and magnetic field topology. SOLAR PHYSICS, v. 240, n. 2, p. 271-281, 2007.
SILVA‚ A.V.R.; SHARE‚ GH; MURPHY‚ RJ; COSTA‚ J.E.R.; DE CASTRO‚ C.G.G.; RAULIN‚ J.P.; KAUFMANN‚ P. Evidence that synchrotron emission from nonthermal electrons produces the increasing submillimeter spectral component in solar flares. SOLAR PHYSICS, v. 245, n. 2, p. 311-326, 2007.
SILVA‚ A.V.R.; LAGANÁ‚ T.F.; DE CASTRO‚ C.G.G.; KAUFMANN‚ P.; COSTA‚ J.E.R.; LEVATO‚ H.; ROVIRA‚ M. Diffuse Component Spectra of Solar Active Regions at Submillimeter Wavelengths. SOLAR PHYSICS, v. 227, n. 2, p. 265-281, 2005.
RAULIN‚ J.P.; MAKHMUTOV‚ V.S.; KAUFMANN‚ P.; PACINI‚ A.A.; LÜTHI‚ T.; HUDSON‚ H.S.; GARY‚ D.E. Analysis of the impulsive phase of a solar flare at submillimeter wavelengths. SOLAR PHYSICS, v. 223, n. 1, p. 181-199, 2004.
MAKHMUTOV‚ VS; RAULIN‚ J.P.; GIMENEZ DE CASTRO‚ CG; KAUFMANN‚ P.; CORREIA‚ E. Wavelet decomposition of submillimeter solar radio bursts. SOLAR PHYSICS, v. 218, n. 1, p. 211-220, 2003.
TROTTET‚ G.; RAULIN‚ J.P.; KAUFMANN‚ P.; SIARKOWSKI‚ M.; KLEIN‚ K.L.; GARY‚ DE. First detection of the impulsive and extended phases of a solar radio burst above 200 GHz. Astronomy & Astrophysics, v. 381, n. 2, p. 694-702, 2002.

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