Browsing by Subject "Astrofísica"

Now showing items 21-40 of 116

  • Commissioning of the BRIKEN beta-delayed neutron detector for the study of exotic neutron-rich nuclei 

    Tolosa-Delgado, Alvaro; Agramunt Ros, Jorge; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Tarifeño Saldivia, Ariel Esteban (EDP Sciences, 2018)
    Conference lecture
    Open Access
    Beta-delayed neutron emission (Beta-n) is a form of radioactive decay in which an electron, an anti-neutrino and one or more neutrons are emitted. This process arises if the energy window of the decay Q_Beta is greater ...

  • Comparative testing of four ionospheric models driven with GPS measurements 

    Zandbergen, R.; Feltens, Joachim; Angling, M; Jackson Booth, N; Jakowski, Norbert; Hoque, Mainul; Hernández Pajares, Manuel; Aragón Ángel, María Ángeles; Orús Pérez, Raül (2011-07-28)
    Article
    Open Access
    In the context of the European Space Agency/European Space Operations Centre funded Study “GNSS Contribution to Next Generation Global Ionospheric Monitoring,” four ionospheric models based on GNSS data (the Electron ...

  • Constraints on the neutrino emission from the Galactic Ridge with the ANTARES telescope 

    Anghinolfi, Marco; Anton, G.; André, Michel; Avgitas, T.; Bertin, V.; Bormuth, R.; Puricelli, Stefano; Coniglione, R.; Gleixner, A; Lefèvre, Dominique; Michael, Turner; Pellegrino, Carlo; Piattelli, P.; Sanchez Losa, Agustín; Schnabel, J. (Elsevier, 2016-09-10)
    Article
    Open Access
    A highly significant excess of high-energy astrophysical neutrinos has been reported by the IceCube Collaboration. Some features of the energy and declination distributions of IceCube events hint at a North/South asymmetry ...

  • Control system of the balloon experimental twin telescope for infrared interferometry 

    Casalprim Torres, Marc (Universitat Politècnica de Catalunya, 2017-09)
    Master thesis
    Open Access
    Covenantee:  Institut Supérieur de l'Aéronautique et de l'Espace / National Aeronautics and Space Administration. Goddard Space Flight Center
    The Balloon Experimental Twin Telescope for Infrared Interferometry (BETTII) is a far infrared telescope on a balloon-based platform that will validate the interferometry technique for future space telescopes. It is one ...

  • Discovery of Cl-34g,Cl-m(p,gamma)Ar-35 resonances activated at classical nova temperatures 

    Fry, C.; Wrede, Christopher; Bishop, Shawn M.; Brown, B. A.; Chen, Alan A.; Faestermann, Thomas; Hertenberger, R.; Parikh, Anuj Ramesh; Perez Loureiro, D; Wirth, Hans Friedrich; Garcia, A.; Ortez, Ronaldo (2015-01-13)
    Article
    Open Access
    Background: The thermonuclear Cl-34g,Cl-m(p,gamma)Ar-35 reaction rates are unknown due to a lack of experimental nuclear physics data. Uncertainties in these rates translate to uncertainties in S-34 production in models ...

  • Distorsiones de espacio-tiempo y los viajes interestelares 

    Martín Cabezón, Rubén (2009-10-20)
    Audiovisual
    Open Access
    Desde que a principios del siglo XX la Relatividad General hiciera su aparición, nuestra comprensión de la gravedad, una de las fuerzas más primordiales (y poco comprendida), ha aumentado considerablemente. Esta teoría ...

  • Dynamical behavior of asteroids near resonance: the 4:1 gap and the 7:2 group 

    Grau Sánchez, Miguel; González Casado, Guillermo (1999-08)
    Article
    Restricted access - publisher's policy
    A comparative study of the evolution of the Sun–Jupiter–Asteroid system near the 4:1 and 7:2 resonances is performed by means of two techniques that proceed differently from the Hamiltonian corresponding to the planar ...

  • Eccentricity samples: implications on the potential and the velocity distribution 

    Cubarsí Morera, Rafael; Stojanovic, Milan; Ninkovic, Slobodan (2017)
    Article
    Open Access
    Planar and vertical epicycle frequencies and local angular velocity are related to the derivatives up to the second order of the local potential and can be used to test the shape of the potential from stellar disc samples. ...

  • Enrico Fermi : de les partícules a l'astrofísica 

    Hernández Fernández, Antonio (2018-12)
    Part of book or chapter of book
    Open Access
    Enrico Fermi (1901-1954) va revolucionar la física del segle XX tot capitanejant el desenvolupament de la física nuclear i de partícules, disciplines que, com veurem, va connectar amb l’astronomia, entre d’altres matèries, ...

  • Ernst K. Zinner (1937-2015) 

    Nittler, L.; José Pont, Jordi (2017)
    Conference report
    Open Access

  • Experiments on the Ionospheric Models in GNSS 

    Vinh, La The; Quang, Phuong Xuan; García Rigo, Alberto; Rovira Garcia, Adrià; Ibáñez Segura, Deimos (2013)
    Conference report
    Open Access
    In GNSS, one of the main error sources of the Standard Positioning Service (SPS) is introduced by the ionosphere. Although this error can be cancelled by combining two signals at different frequencies, most of the ...

  • Experiments with neutron beams for the astrophysical s process 

    Lederer, Claudia; Altstadt, Sebastian; Andrzejewski, Józef; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén (Institute of Physics (IOP), 2013)
    Conference report
    Open Access
    Neutron capture cross sections are the key nuclear physics input to study the slow neutron capture process, which is responsible for forming about half of the elemental abundances above Fe. Stellar neutron capture cross ...

  • First all-flavor neutrino pointlike source search with the ANTARES neutrino telescope 

    André, Michel; Anghinolfi, Marco; Anton, G.; Avgitas, T.; Bertin, V.; Bormuth, R.; Puricelli, Stefano; Coniglione, R.; Lefèvre, Dominique; Michael, Turner; Pellegrino, Carlo; Piattelli, P.; Sanchez Losa, Agustín; Trovato, A.; Zúñiga Román, Juan (2017-10-03)
    Article
    Open Access
    A search for cosmic neutrino sources using the data collected with the ANTARES neutrino telescope between early 2007 and the end of 2015 is performed. For the first time, all neutrino interactions—charged- and neutral-current ...

  • First measurement of the 34S(p,gamma)35Cl reaction rate through indirect methods for presolar nova grains 

    Gillespie, S; Parikh, A.; Barton, C; Faestermann, Thomas; José Pont, Jordi; Hertenberger, R.; Wirth, Hans Friedrich; de Séréville, N; Riley, J; Williams, M (AMER PHYSICAL SOC, 2017-08-02)
    Article
    Open Access
    Sulphur isotopic ratio measurements may help to establish the astrophysical sites in which certain presolar grains were formed. Nova model predictions of the 34S/32S ratio are, however, unreliable due to the lack of an ...

  • First study on the feasibility of stellar flares detection with GPS 

    Martínez Cid, David (Universitat Politècnica de Catalunya, 2016-09)
    Bachelor thesis
    Open Access
    The overionization generated by solar flares on the Earth ionosphere is a very active field of research. In this TFG it is intended to develop a first study the feasibility of the detection of stellar bursts by means of a ...

  • High-temperature combustion: Approaching equilibrium using nuclear networks 

    Cabezón Gómez, Rubén Martín; García Senz, Domingo; Bravo Guil, Eduardo (2004-04)
    Article
    Restricted access - publisher's policy

  • Hydrodynamic simulations of classical novae: accretion onto CO white dwarfs as SN Ia progenitors 

    Starrfield, Sumner; Bose, M; Iliadis, Christian; Hix, W. R.; Woodward, C; Wagner, R; José Pont, Jordi; Hernanz Carbó, Margarita (PoS - Proceedings of Science, 2018)
    Conference report
    Open Access

  • Intrinsic limits on resolutions in muon- and electron-neutrino charged-current events in the KM3NeT/ORCA detector 

    Ageron, M.; Aiello, G.; Ameli, F; André, Michel (2017-05-01)
    Article
    Open Access
    Studying atmospheric neutrino oscillations in the few-GeV range with a multi-megaton detector promises to determine the neutrino mass hierarchy. This is the main science goal pursued by the future KM3NeT/ORCA water Cherenkov ...

  • Joint Constraints on Galactic Diffuse Neutrino Emission from the ANTARES and IceCube Neutrino Telescopes 

    Albert, A.; André, Michel; Anghinolfi, Marco; Ardid Ramírez, Miguel; Aubert, J.-J. (Institute of Physics (IOP), 2018-12-01)
    Article
    Open Access
    The existence of diffuse Galactic neutrino production is expected from cosmic-ray interactions with Galactic gas and radiation fields. Thus, neutrinos are a unique messenger offering the opportunity to test the products ...

  • Laue lens simulation for gamma radiation in the energy range of 1 MeV 

    Perengüez Lopez, James (Universitat Politècnica de Catalunya, 2013-05-20)
    Master thesis
    Open Access
    [ANGLÈS] The study of difraction applied to Laue lenses is a very promising tool in the field of astrophysics of gamma radiation. In the present work we carried out a theoretical study and a computational simulation of a ...