miércoles 16 de abril de 2014

 

 



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Nomenclatura Unesco > (21) Astronomía y Astrofísica
(2101) Cosmología y cosmogonía (2102) Medio interplanetario
(2103) Astronomía optica (2104) Planetología
(2105) Radioastronomía (2106) Sistema solar
(2199) Otras especialidades astronómicas (especificar)

Mostrando recursos 1 - 20 de 548

1. Testando as Propriedades Físicas do Modelo Unificado de Galáxias de Núcleo Ativo - Audibert, Anelise

2. A galáxia NGC 7020: estudo de populações estelares e de órbitas especiais na sua barra - Bueno, Felipe Augusto Bianchi

3. Perfis de Densidade de Matéria na Redondeza Solar - Aguiar, Gabriel Corrêa de

4. Algoritmo para extração fotométrica nos dados do ESO-VVV: o aglomerado estelar massivo Pismis 24 - Dias, Rafael Augusto Garcia

5. Determinação do campo magnético de estrelas anãs brancas através do efeito Zeeman quadrático - Wilsmann, Karin Wittmann

6. Caracterização das cordas cósmicas girantes a partir da modelagem pela teoria de gravitação de Brans-Dicke - Silva, Renan Floriano da

7. Classificação Espectral de Anãs Brancas - Ourique, Gustavo

8. Mached Filter na Detecção de Caudas de Maré - Queiroz, Anna Barbara de Andrade

9. Revista Mexicana de Astronomía y Astrofísica : Universidad Nacional Autónoma de México. Instituto de Astronomía

10. Mathematical Methods Applied to the Celestial Mechanics of Artificial Satellites 2013 - Prado, Antonio F. Bertachini A.; Masdemont Soler, Josep; Zanardi, Maria Cecilia; Winter, Silvia Maria Giuliatti; Yokoyama, Tadashi; Gomes, Vivian Martins
Postprint (published version)

11. Mathematical Methods Applied to the Celestial Mechanics of Artificial Satellites 2013 - Prado, Antonio F. Bertachini A.; Masdemont Soler, Josep; Zanardi, Maria Cecilia; Winter, Silvia Maria Giuliatti; Yokoyama, Tadashi; Gomes, Vivian Martins
Postprint (published version)

12. Lagrange y la primera formulación de la mecánica analítica - Navarro, Luis

13. Solar EUV flux rate estimation during mid and strong flares from the ionospheric electron content response signature in GNSS observations - Hernández Pajares, Manuel; García Rigo, Alberto; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Monte Moreno, Enrique; Aragón Ángel, María Ángeles
A simple and precise technique to measure the sudden Extreme Ultraviolet (EUV) radiation increase of the Sun, during mid and strong flares, has been formulated and demonstrated for the most active part of the last Solar Cycle. On the one hand, it is based on the short time scale of these events, which allows the validity of a simple global overionization model. And on the other hand on the prompt ionospheric response to the EUV ionization, which signature (in terms of the Global Navigation Satellite Systems -GNSSSolar Flare Activity Indicator, GSFLAI) is accurately measured in real-time from the existing global...

14. Solar EUV flux rate estimation during mid and strong flares from the ionospheric electron content response signature in GNSS observations - Hernández Pajares, Manuel; García Rigo, Alberto; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Monte Moreno, Enrique; Aragón Ángel, María Ángeles
A simple and precise technique to measure the sudden Extreme Ultraviolet (EUV) radiation increase of the Sun, during mid and strong flares, has been formulated and demonstrated for the most active part of the last Solar Cycle. On the one hand, it is based on the short time scale of these events, which allows the validity of a simple global overionization model. And on the other hand on the prompt ionospheric response to the EUV ionization, which signature (in terms of the Global Navigation Satellite Systems -GNSSSolar Flare Activity Indicator, GSFLAI) is accurately measured in real-time from the existing global...

15. Impact of higher order ionospheric delay on precise GNSS computation - Hernández Pajares, Manuel; Aragon Angel, Maria Angeles; Defraigne, Pascale; Bergeot, Nicolas; Prieto Cerdeira, Roberto; Sanz Subirana, Jaume
Peer Reviewed

16. Impact of higher order ionospheric delay on precise GNSS computation - Hernández Pajares, Manuel; Aragon Angel, Maria Angeles; Defraigne, Pascale; Bergeot, Nicolas; Prieto Cerdeira, Roberto; Sanz Subirana, Jaume
Peer Reviewed

17. The shape of a galaxy is not much influenced by the potential as it might seem - Cubarsí Morera, Rafael
The dynamics of a galaxy as a stellar system in statistical equilibrium is usually obtained from the superposition principle, based on the linearity of the Boltzmann collisionless equation (BCE) in regard to the phase space density function. The term statistical equilibrium is a notion coming from statistical dynamics, although, from an analytical dynamics viewpoint, it should be associated with an invariant (conservative) density function under the BCE in the phase space. Similarly, dissipative forces like dynamical friction, which are essential to statistical dynamics, emerge in analytical dynamics via non steady-state phase density functions and/or potentials as solutions of the BCE....

18. The shape of a galaxy is not much influenced by the potential as it might seem - Cubarsí Morera, Rafael
The dynamics of a galaxy as a stellar system in statistical equilibrium is usually obtained from the superposition principle, based on the linearity of the Boltzmann collisionless equation (BCE) in regard to the phase space density function. The term statistical equilibrium is a notion coming from statistical dynamics, although, from an analytical dynamics viewpoint, it should be associated with an invariant (conservative) density function under the BCE in the phase space. Similarly, dissipative forces like dynamical friction, which are essential to statistical dynamics, emerge in analytical dynamics via non steady-state phase density functions and/or potentials as solutions of the BCE....

19. UV to far-IR reflectance spectra of carbonaceous chondrites - I. Implications for remote characterization of dark primitive asteroids targeted by sample-return missions - Trigo-Rodríguez, José María; Moyano Cambero, Carles E.; Llorca Piqué, Jordi; Fornasier, Sonia; Barucci, Maria Antonietta; Belskaya, Irina N.; Martins, Zita; Rivkin, Andrew S.; Dotto, Elisabetta; Madiedo, José María; Alonso Azcárate, Jacinto
We analyse here a wide sample of carbonaceous chondrites from historic falls (e.g. Allende, Cold Bokkeveld, Kainsaz, Leoville, Murchison, Murray, Orgueil and Tagish Lake) and from NASA Antarctic collection.With the analysis of these meteorites we want to get new clues on the role of aqueous alteration in promoting the reflectance spectra diversity evidenced in the most primitive chondrite groups. The selected meteorite specimens are a sample large enough to exemplify how laboratory reflectance spectra of rare groups of carbonaceous chondrites exhibit distinctive features that can be used to remotely characterize the spectra of primitive asteroids. Our spectra cover the full electromagnetic spectrum from 0.2 to 25 μm...

20. UV to far-IR reflectance spectra of carbonaceous chondrites - I. Implications for remote characterization of dark primitive asteroids targeted by sample-return missions - Trigo-Rodríguez, José María; Moyano Cambero, Carles E.; Llorca Piqué, Jordi; Fornasier, Sonia; Barucci, Maria Antonietta; Belskaya, Irina N.; Martins, Zita; Rivkin, Andrew S.; Dotto, Elisabetta; Madiedo, José María; Alonso Azcárate, Jacinto
We analyse here a wide sample of carbonaceous chondrites from historic falls (e.g. Allende,Cold Bokkeveld, Kainsaz, Leoville, Murchison, Murray, Orgueil and Tagish Lake) and fromNASA Antarctic collection.With the analysis of these meteorites we want to get new clues onthe role of aqueous alteration in promoting the reflectance spectra diversity evidenced in themost primitive chondrite groups. The selected meteorite specimens are a sample large enoughto exemplify how laboratory reflectance spectra of rare groups of carbonaceous chondritesexhibit distinctive features that can be used to remotely characterize the spectra of primitiveasteroids. Our spectra cover the full electromagnetic spectrum from 0.2 to 25 μm...

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