Search Results - "Costa, J. E. R"

E region electric field dependence of the solar activity by Denardini, C. M., Moro, J., Resende, L. C. A., Chen, S. S., Schuch, N. J., Costa, J. E. R.

“…We have being studying the zonal and vertical E region electric field components inferred from the Doppler shifts of type 2 echoes (gradient drift…”
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Stokes imaging of AM Her systems using 3D inhomogeneous models – I. Description of the code and an application to V834 Cen by Costa, J. E. R., Rodrigues, C. V.

“…Polars (or AM Her systems) are cataclysmic variables without a disc due to the strong magnetic field of the white dwarf. Most of their emission comes from the…”
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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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High‐Energy Electron Flux Enhancement Pattern in the Outer Radiation Belt in Response to the Interplanetary Coronal Mass Ejections by Silva, L. A., Shi, J., Marchezi, J. P., Agapitov, O. V., Sibeck, D., Alves, L. R., Vieira, L. E. A., Deggeroni, V., Resende, L. C. A., Lopez, R., Costa, J. E. R., Wang, C., Moro, J., Li, H., Lago, A. Dal, Ferreira, K. J. C., Inostroza, A., Liu, Z.

“…The high‐energy electron flux enhancement pattern in the outer radiation belt is observed under the influence of the Interplanetary Coronal Mass Ejections…”
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Flare parameters inferred from a 3D loop model data base by Cuambe, Valente A, Costa, J E R, Simões, P J A

“…Abstract We developed a data base of pre-calculated flare images and spectra exploring a set of parameters which describe the physical characteristics of…”
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Global Modeling of the Inner Magnetosphere Under the Influence of a Magnetic Cloud Associated With an Interplanetary Coronal Mass Ejection: Energy Conversion and Ultra‐Low Frequency Wave Activity by Jauer, P. R., Wang, C., Echer, E., Souza, V. M., Da Silva, L. A., Marchezi, J. P., Alves, L. R., Alves, M. V., Douglas, S., Loesch, C., Liu, Z., Hui, L., Vieira, L. E. A., Gonzalez, W. D., Denardini, C. M., Medeiros, C., Costa, J. E. R.

“…The interaction and response of the magnetic cloud‐type structure with Earth's magnetosphere were modeled by the SWMF/BATS‐R‐US code. The conversion of…”
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Analysis of Cosmic Rays' Atmospheric Effects and Their Relationships to Cutoff Rigidity and Zenith Angle Using Global Muon Detector Network Data by Mendonça, R. R. S., Wang, C., Braga, C. R., Echer, E., Dal Lago, A., Costa, J. E. R., Munakata, K., Li, H., Liu, Z., Raulin, J.‐P., Kuwabara, T., Kozai, M., Kato, C., Rockenbach, M., Schuch, N. J., Al Jassar, H. K., Sharma, M. M., Tokumaru, M., Duldig, M. L., Humble, J. E., Evenson, P., Sabbah, I.

“…Cosmic rays are charged particles whose flux observed at Earth shows temporal variations related to space weather phenomena and may be an important tool to…”
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A Global Magnetohydrodynamic Simulation Study of Ultra-low-frequency Wave Activity in the Inner Magnetosphere: Corotating Interaction Region + Alfvénic Fluctuations by Jauer, P. R., Wang, C., Souza, V. M., Alves, M. V., Alves, L. R., Pádua, M. B., Marchezi, J. P., Silva, Da L. A., Liu, Z., Li, H., Vieira, L. E. A., Lago, A. Dal, Gonzalez, W. D., Echer, E., Medeiros, C., Costa, J. E. R., Denardini, C. M.

“…Using global magnetohydrodynamic (MHD) simulations, we investigate the role played by a complex solar structure composed of a corotating interaction region…”
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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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Stokes imaging of AM Her systems using 3D inhomogeneous models - II. Modelling X-ray and optical data of CP Tucanae by Silva, K. M. G., Rodrigues, C. V., Costa, J. E. R., de Souza, C. A., Cieslinski, D., Hickel, G. R.

“…The viewing geometry of the polar CP Tuc that better explains its optical and X-ray light curves is controversial. Previous modelling of white-light…”
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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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MLS110213:022733+130617: a new eclipsing polar above the period gap by Silva, K. M. G., Rodrigues, C. V., Oliveira, A. S., Almeida, L. A., Cieslinski, D., Costa, J. E. R., Jablonski, F. J.

“…This study confirms MLS110213:022733+130617 as a new eclipsing polar. We performed optical spectroscopic, polarimetric and photometric follow-up of this…”
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Gyrosynchrotron Emission from Anisotropic Pitch-Angle Distribution of Electrons in 3-D Solar Flare Sources by Simões, P. J. A., Costa, J. E. R.

“…We present calculations, made for the first time, of the gyrosynchrotron emission by mildly relativistic electrons with anisotropic pitch-angle distribution…”
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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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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 burst with millimetre-wave emission at high frequency only by Kaufmann, P., Correia, E., Costa, J. E. R., Vaz, A. M. Z., Dennis, B. R.

“…The first high sensitivity and high time-resolution observations of a solar burst taken simultaneously at 90 GHz and at 30 GHz are presented. These identify a…”
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Sub-second pulsations simultaneously observed at microwaves and hard X rays in a solar burst by Takakura, T, Kaufmann, P, Costa, J. E. R, Degaonkar, S. S, Ohki, K, Nitta, N

“…A solar subflare on Nov. 4, 1981 was monitored at subsecond intervals using the X ray detector on the Hinotori satellite and the ground-based 45 ft Itapetinga…”
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Evaluation of dB/dt amplitudes and sources over the Brazilian region during geomagnetic storms in the 2021–2022 biennium by Silva, G.B.D., Alves, L.R., Espinosa, K.V., Souza, V.M., da Silva, L.A., Costa, J.E.R., Pádua, M.B., Sanchez, S.A.

“…The rate of change of the geomagnetic field (dB/dt) observed at Earth’s surface has been used as a proxy of geomagnetically induced currents, which are known…”
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Analysis of cosmic rays' atmospheric effects and their relationships to cutoff rigidity and zenith angle using Global Muon Detector Network data by Mendonça, R. R. S, Wang, C, Braga, C. R, Echer, E, Lago, A. Dal, Costa, J. E. R, Munakata, K, Li, H, Liu, Z, Raulin, J. -P, Kuwabara, T, Kozai, M, Kato, C, Rockenbach, M, Schuch, N. J, Jassar, H. K. Al, Sharma, M. M, Tokumaru, M, Duldig, M. L, Humble, J. E, Evenson, P, Sabbah, I

“…Cosmic rays are charged particles whose flux observed at Earth shows temporal variations related to space weather phenomena and may be an important tool to…”
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Oscillations in the Flaring Active Region NOAA 11272 by Cuellar, S. M. Conde, Costa, J. E. R, Montaña, C. E. Cedeño

“…Solar Physics,291(11),3289-3302, 2016 We studied waves seen during the class C1.9 flare that occurred in Active Region NOAA 11272 on SOL2011-08-17. We found…”
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