Search Results - "Giménez De Castro, C G"

Spectral signature of solar active region in millimetre and submillimetre wavelengths by Valle Silva, J F, Giménez de Castro, C G, Selhorst, C L, Raulin, J-P, Valio, A

“…ABSTRACT Active regions were observed with different instruments covering the spectral band from 17 to 405 GHz. The observations were made with the Nobeyama…”
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Solar Polar Brightening and Radius at 100 and 230 GHz Observed by ALMA by Selhorst, Caius L., Simões, Paulo J. A., Brajša, Roman, Valio, Adriana, de Castro, C. G. Giménez, Costa, Joaquim E. R., Menezes, Fabian, Rozelot, Jean Pierre, Hales, Antonio S., Iwai, Kazumasa, White, Stephen

“…Polar brightening of the Sun at radio frequencies has been studied for almost 50 years and yet a disagreement persists between solar atmospheric models and…”
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Spectral Trends of Solar Bursts at Sub-THz Frequencies by Fernandes, L. O. T., Kaufmann, P., Correia, E., Giménez de Castro, C. G., Kudaka, A. S., Marun, A., Pereyra, P., Raulin, J.-P., Valio, A. B. M.

“…Previous sub-THz studies were derived from single-event observations. We here analyze for the first time spectral trends for a larger collection of sub-THz…”
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THE 17 GHz ACTIVE REGION NUMBER by Selhorst, C L, Costa, J E R, DE CASTRO, C G GIMENEZ, VALIO, A, Pacini, A A, Shibasaki, K

“…We report the statistics of the number of active regions (NAR) observed at 17 GHz with the Nobeyama Radioheliograph between 1992, near the maximum of cycle 22,…”
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Evidence that Synchrotron Emission from Nonthermal Electrons Produces the Increasing Submillimeter Spectral Component in Solar Flares by Silva, Adriana V. R., Share, G. H., Murphy, R. J., Costa, J. E. R., de Castro, C. G. Giménez, Raulin, J.-P., Kaufmann, P.

“…We investigate the origin of the increasing spectra observed at submillimeter wavelengths detected in the flare on 2 November 2003 starting at 17:17 UT. This…”
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The Behavior of the 17 GHz Solar Radius and Limb Brightening in the Spotless Minimum XXIII/XXIV by Selhorst, C. L, Giménez de Castro, C. G, Válio, A, Costa, J. E. R, Shibasaki, K

“…The current solar minimum has surprised the entire solar community because the spotless period is presently almost 2-3 years longer than the usual minima. To…”
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A Burst with Double Radio Spectrum Observed up to 212 GHz by Giménez de Castro, C. G., Cristiani, G. D., Simões, P. J. A., Mandrini, C. H., Correia, E., Kaufmann, P.

“…We study a solar flare that occurred on 10 September 2002, in active region NOAA 10105, starting around 14:52 UT and lasting approximately 5 minutes in the…”
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A BRIGHT IMPULSIVE SOLAR BURST DETECTED AT 30 THz by Kaufmann, P, White, S M, Freeland, S L, Marcon, R, Fernandes, L O T, Kudaka, A S, V, R, Aballay, J L, Fernandez, G, Godoy, R, Marun, A, Valio, A, Raulin, P, Gimenez, C G

“…Ground- and space-based observations of solar flares from radio wavelengths to gamma-rays have produced considerable insights but raised several unsolved…”
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Association of Radio Polar Cap Brightening with Bright Patches and Coronal Holes by Selhorst, Caius L., Simões, Paulo J. A., Silva, Alexandre J. Oliveira e, Castro, C. G. Giménez de, Costa, Joaquim E. R., Valio, Adriana

“…Radio-bright regions near the solar poles are frequently observed in Nobeyama Radioheliograph (NoRH) maps at 17 GHz, and often in association with coronal…”
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Solar Submillimeter and Gamma-Ray Burst Emission by Kaufmann, P, Raulin, J.-P, Melo, A. M, Correia, E, Costa, J. E. R, de Castro, C. G. Giménez, Silva, A. V. R, Yoshimori, M, Hudson, H. S, Gan, W. Q, Gary, D. E, Gallagher, P. T, Levato, H, Marun, A, Rovira, M

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Solar flares at submillimeter wavelengths by Krucker, Säm, Giménez de Castro, C. G., Hudson, H. S., Trottet, G., Bastian, T. S., Hales, A. S., Kašparová, J., Klein, K.-L., Kretzschmar, M., Lüthi, T., Mackinnon, A., Pohjolainen, S., White, S. M.

“…We discuss the implications of the first systematic observations of solar flares at submillimeter wavelengths, defined here as observing wavelengths shorter…”
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Observed flux density enhancement at submillimeter wavelengths during an X-class flare by Cristiani, G., Giménez de Castro, C.G., Luoni, M.L., Mandrini, C.H., Rovira, M.G., Kaufmann, P., Machado, M.

“…We analyse the 30 October, 2004, X1.2/SF solar event that occurred in AR 10691 (N13 W18) at around 11:44 UT. Observations at 212 and 405 GHz of the Solar…”
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A New Solar Burst Spectral Component Emitting Only in the Terahertz Range by Kaufmann, Pierre, Raulin, Jean-Pierre, de Castro, C. G. Giménez, Levato, Hugo, Gary, Dale E, Costa, Joaquim E. R, Marun, Adolfo, Pereyra, Pablo, Silva, Adriana V. R, Correia, Emilia

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POlarization Emission of Millimeter Activity at the Sun (POEMAS): New Circular Polarization Solar Telescopes at Two Millimeter Wavelength Ranges by Valio, Adriana, Kaufmann, P., Giménez de Castro, C. G., Raulin, J.-P., Fernandes, L. O. T., Marun, A.

“…We 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…”
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Spatial Characterization of a Flare Using Radio Observations and Magnetic Field Topology by Cristiani, G., Martinez, G., Mandrini, C. H., Giménez De Castro, C. G., Da Silva, C. W., Rovira, M. G., Kaufmann, P.

“…Using magnetograms, EUV and Hα images, Owens Valley Solar Array microwave observations, and 212-GHz flux density derived from the Solar Submillimeter Telescope…”
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Asymmetric precipitation in a coronal loop as explanation of a singular observed spectrum by Cristiani, G., Giménez de Castro, C.G., Mandrini, C.H., Machado, M.E., Rovira, M.G.

“…Almost 10 years of solar submillimeter observations have shown new aspects of solar activity, such as the presence of rapid solar spikes associated with the…”
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Equatorial spread-F occurrence observed at two near equatorial stations in the Brazilian sector and its occurrence modulated by planetary waves by Bertoni, F.C.P., Sahai, Y., Raulin, J.-P., Fagundes, P.R., Pillat, V.G., Gimenez de Castro, C.G., Lima, W.L.C.

“…In this work, we present a study on the ionospheric Equatorial Spread-F (ESF) occurrence and morphologic features, based on measurements made during the period…”
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The Solar Radius at 37 GHz through Cycles 22 to 24 by Selhorst, Caius L, Kallunki, Juha, de Castro, C. G. Giménez, Valio, Adriana, Costa, Joaquim E. R

“…To better understand the influence of the activity cycle on the solar atmosphere, we report the time variation of the radius observed at 37 GHz ($\lambda$=8.1…”
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Rapid Submillimeter Brightenings Associated with a Large Solar Flare by Kaufmann, P, Raulin, J.-P, Correia, E, Costa, J. E. R, de Castro, C. G. Giménez, Silva, A. V. R, Levato, H, Rovira, M, Mandrini, C, Fernández-Borda, R, Bauer, O. H

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HATS: A Ground-Based Telescope to Explore the THz Domain by de Castro, C. G. Giménez, Raulin, J. -P, Valio, A, Alaia, G, Alvarenga, V, Bortolucci, E. C, Fernandes, S. H, Francile, C, Giorgetti, T, Kudaka, A. S, López, F. M, Marcon, R, Marún, A, Zaquela, M

“…The almost unexplored frequency window from submillimeter to mid-infrared (mid-IR) may bring new clues about the particle acceleration and transport processes…”
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