Výsledky vyhledávání - "ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Estrellas [UNESCO]"

Relativistic Hydrodynamics and Spectral Evolution of GRB Jets

Publikováno v: RODERIC. Repositorio Institucional de la Universitat de Valéncia
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En la presente tesis hemos estudiado los sistemas progenitores de las erupciones de rayos gamma (ERG, o GRBs por sus siglas en inglés --Gamma-Ray Bursts--) de larga duración mediante modelos numéricos de su evolución dinámica y emisión electrom

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0a05bfa7a37462095c568a7cb696ecdc
http://hdl.handle.net/10550/60784

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Unveiling the nature of six HMXBs through IR spectroscopy

Autor: Juan Fabregat, R. E. Mennickent, E. Nespoli

Publikováno v: Nespoli, E., Fabregat, J. and Mennickent, R. E. (2008): Unveiling the nature of six HMXBs through IR spectroscopy, Astronomy and Astrophysics, núm. 486, vol. 3, pp. 911-917
Astronomy & Astrophysics
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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ASTRONOMY & ASTROPHYSICS

The International Gamma-Ray Astrophyiscs Laboratory (INTEGRAL) is discovering a large number of new hard X-ray sources, many of them being HMXBs. The identification and spectral characterization of their optical/infrared counterparts is a necessary s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c6de98f7ef22c49b786b26af444c058
https://doi.org/10.1051/0004-6361:200809645

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Local simulations of the magnetized Kelvin-Helmholtz instability in neutron-star mergers

Autor: M. Obergaulinger, Miguel A. Aloy, E. Müller

Publikováno v: Obergaulinger, M., Aloy, M. A. and Müller, E. (2010): Local simulations of the magnetized Kelvin-Helmholtz instability in neutron-star mergers, Astronomy and Astrophysics, núm. 515, vol. 5, art. no. 13386
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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Context. Global MHD simulations show Kelvin-Helmholtz (KH) instabilities at the contact surface of two merging neutron stars. That region has been identified as the site of efficient amplification of magnetic fields. However, these global simulations

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0cb96184d03fe3d6a836103bae24b34
https://doi.org/10.1051/0004-6361/200913386

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Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54

Autor: Ignacio Negueruela, Pablo Reig, Jörn Wilms, Pere Blay, Jose M. Torrejon, Marc Ribó

Publikováno v: Reig, P., Torrejón, J. M., Negueruela, I., Blay, P., Ribó, M. and Wilms, J. (2009): Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54, Astronomy and Astrophysics, núm. 494, vol. 3, pp. 1073-1082
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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Context. The source 4U 2206+54 is one of the most enigmatic high-mass X-ray binaries. In spite of intensive searches, X-ray pul- sations have not been detected in the time range 10−3–103 s. A cyclotron line at ∼30 keV has been suggested by vari

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::830552f64f631840f37e72ff822d8cca
http://hdl.handle.net/10550/14021

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Semi-global simulations of the magneto-rotational instability in core collapse supernovae

Autor: Ewald Müller, Miguel-Ángel Aloy, Pablo Cerdá-Durán, M. Obergaulinger

Publikováno v: OBERGAULINGER, M., CERDÁ-DURÁN, P., MÜLLER, E. and ALOY, M. A. (2009): Semi-global simulations of the magneto-rotational instability in core collapse supernovae, Astronomy and Astrology, núm. 498, vol 1, pp. 241
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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Possible effects of magnetic fields in core collapse supernovae rely on an efficient amplification of the weak pre-collapse fields. It has been suggested that the magneto-rotational instability (MRI) leads to rapid field growth. Although MRI studies

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f0b887d05ca5f638e876ee3315093ab
http://hdl.handle.net/10550/16711

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23 GHz VLBI observations of SN 2008ax (Research Note)

Autor: Martí Vidal, Iván, Marcaide Osoro, Juan María, Alberdi, A., Guirado Puerta, Jose Carlos, Pérez Torres, Miguel Ángel, Ros Ibarra, Eduardo, Shapiro, I.I., Beswick, R.J., Muxlow, T.W.B., Pedlar, A., Argo, M.K., Immler, S., Panagia, N., Stockdale, C.J., Sramek, R.A., Van Dyk, S. D., Weiler, K.W.

Publikováno v: MARTÍ-VIDAL, I., Marcaide, J. M., Alberdi, A., GUIRADO, J. C., PÉREZ-TORRES, M. A., ROS, E., SHAPIRO, I. I., BESWICK, R. J., MUXLOW, T. W. B., PEDLAR, A., ARGO, M. K., IMMLER, S., PANAGIA, N., STOCKDALE, C. J., SRAMEK, R. A., VAN DYK, S. and WEILER, K. W. (2009): 23 GHz VLBI observations of SN 2008ax (Research Note), Astronomy and Astrophysics, vol. 499, núm 3, pp. 649
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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We report on phase-referenced 23 GHz Very-Long-Baseline-Interferometry (VLBI) observations of the type IIb supernova SN 2008ax, made with the Very Long Baseline Array (VLBA) on 2 April 2008 (33 days after explosion). These observations resulted in a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3890d0abb1225bedd7d8c464877a4cd4
http://hdl.handle.net/10550/16708

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The pre-outburst flare of the A 0535+26 August/September 2005 outburst

Autor: Richard E. Rothschild, Konstantin Postnov, Andrea Santangelo, Ingo Kreykenbohm, Colleen A. Wilson, Ascension Camero-Arranz, Peter Kretschmar, D. Klochkov, Mark H. Finger, Isabel Caballero, Ruediger Staubert, Katja Pottschmidt, Slawomir Suchy, Jörn Wilms

Publikováno v: Caballero, I., Santangelo, A., Kretschmar, P., Staubert, R., Postnov, K., Klochkov, D., Camero Arranz, A., Finger, M. H., Kreykenbohm, I., Pottschmidt, K., Rothschild, R. E., Suchy, S., Wilms, J. and Wilson, C. A. (2008): The pre-outburst flare of the A0535+26 August/September 2005 outburst, Astronomy and Astrophysics, núm. 480, vol. 2, pp. L17-L20
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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We study the spectral and temporal behavior of the High Mass X-ray Binary A 0535+26 during a `pre-outburst flare' which took place ~5 d before the peak of a normal (type I) outburst in August/September 2005. We compare the studied behavior with that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a2f55bfe027d79ddf45389dbe1db94d
http://arxiv.org/abs/0801.3167

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A new general relativistic magnetohydrodynamics code for dynamical spacetimes

Autor: L. Antón, Pablo Cerdá-Durán, José A. Font, Ewald Müller

Publikováno v: Cerdá-Durán, P., Font, J. A., Antón, L. and Müller, E. (2008): A new general relativistic magnetohydrodynamics code for dynamical spacetimes, Astronomy and Astrophysics, núm. 492, vol. 3, pp. 937-953
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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We present a new numerical code which solves the general relativistic magneto-hydrodynamics (GRMHD) equations coupled to the Einstein equations for the evolution of a dynamical spacetime within the conformally-flat approximation. This code has been d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78536e61d1ba044eb411a2388e7319ee
http://hdl.handle.net/10550/14013

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Pulsating B and Be stars in the Small Magellanic Cloud

Autor: Christophe Martayan, Juan Gutiérrez-Soto, P. D. Diago, Juan Fabregat

Publikováno v: Diago, P. D., Gutiérrez-Soto, J., Fabregat, J. and Martayan, C. (2008): Pulsating B and Be stars in the Small Magellanic Cloud, Astronomy and Astrophysics, núm. 480, vol. 1, pp. 179-186
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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Context: Stellar pulsations in main-sequence B-type stars are driven by the kappa-mechanism due to the Fe-group opacity bump. The current models do not predict the presence of instability strips in the B spectral domain at very low metallicities. As

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0519962848340fad42dddebedd90c68
http://arxiv.org/abs/0709.4573

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A photometric study of Be stars located in the seismology fields of COROT

Autor: A.-M. Hubert, Michele Floquet, Juan Fabregat, R. Garrido, J. Suso, M. Lanzara, Juan Gutiérrez-Soto

Publikováno v: Gutiérrez-Soto, J., Fabregat, J., Suso, J., Lanzara, M., Garrido, R., Hubert, A.-M. and M. Floquet(2007): A photometric study of Be stars located in the seismology fields of COROT, Astronomy and Astrophysics, núm. 476, vol. 2, pp. 927-933
RODERIC. Repositorio Institucional de la Universitat de Valéncia
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Context: In preparation for the COROT mission, an exhaustive photometric study of Be stars located in the seismology fields of the COROT mission has been performed. The very precise and long-time-spanned photometric observations gathered by the COROT

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16271d7433f53a689ec0a09a30f54400

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