Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Costa, J. E. R."'
Autor:
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 study them. The cosmic ray intensity recorded with ground-based detectors also shows temporal
Externí odkaz:
http://arxiv.org/abs/1910.06187
Akademický článek
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Publikováno v:
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 standing waves with periods in the 9- and 19-minute band in six extreme ultraviolet (EUV) wavelengths of the SDO/AIA instrument. We
Externí odkaz:
http://arxiv.org/abs/1611.08707
Autor:
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 variable source identified by the Catalina Real Time Transient Survey. Using the mid-eclipse time
Externí odkaz:
http://arxiv.org/abs/1502.00014
Autor:
Selhorst, C. L., Costa, J. E. R., de Castro, C. G. Giménez, 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, and 2013, that also includes the maximum of cycle 24, and we compare with other activity i
Externí odkaz:
http://arxiv.org/abs/1406.2252
Autor:
Silva, K. M. G., Rodrigues, C. V., Costa, J. E. R., Cieslinski, D., Almeida, L. A., Magalhães, V. S.
Publikováno v:
Revista Univap Especial, v. 19, n. 34 (2013)
In this work, we present the first results of a study of a new sample of 7 polar candidates from polarimetric data obtained at the Pico dos Dias / LNA observatory. From the four polars analysed so far, we confirm the presence of high and variable pol
Externí odkaz:
http://arxiv.org/abs/1401.7862
Autor:
Silva, K. M. G., Rodrigues, C. V., Oliveira, A. S., Almeida, L. A., Cieslinski, D., Costa, J. E. R., Jablonski, F. J.
We present new data that confirm MLS110213:022733+130617 as a new eclipsing polar. Some system properties were estimated.
Comment: Proceedings of the XIV Latin American Regional IAU Meeting - RevMexAA
Comment: Proceedings of the XIV Latin American Regional IAU Meeting - RevMexAA
Externí odkaz:
http://arxiv.org/abs/1401.8281
Autor:
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 polarimetric data considered the partial self-eclipse of an extended inhomogeneous emitting region. A
Externí odkaz:
http://arxiv.org/abs/1304.2605
Autor:
Rodrigues, C. V., Jablonski, F. J., Taylor, K., Dominici, T., Laporte, R., Pereyra, A., Strauss, C., Magalhaes, A. M., Assafin, M., Carciofi, A., Costa, J. E. R., Cieslinski, D., Franco, G., Kanaan, A., Milone, A., Silva, K. M. G.
We present the basic concept of a new astronomical instrument: SPARC4 - Simultaneous Polarimeter and Rapid Camera in 4 bands. SPARC4 combines in one instrument: (i) photometric and polarimetric modes; (ii) sub-second time-resolution in photometric mo
Externí odkaz:
http://arxiv.org/abs/1108.3455
From the optical to the X-ray frequencies, most of the continuum emission from AM Her systems originates in the post-shock region. Hence, using multi-spectral data can be useful to restrict the physical and geometrical properties of that region. In s
Externí odkaz:
http://arxiv.org/abs/1101.5568