Browsing by Subject "Astrofísica"

Now showing items 1-20 of 140

    • 7Be(n,alpha) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n TOF facility at CERN 

      Barbagallo, Massimo; Colonna, Nicola; Aberle, O.; Calviño Tavares, Francisco; Casanovas Hoste, Adrià; Cortés Rossell, Guillem Pere; Tarifeño Saldivia, Ariel Esteban (EDP Sciences, 2016)
      Conference lecture
      Open Access
      The Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial 7Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called “Spite plateau” ...

    • A GEANT4 Simulation-based study of CIRBE mission 

      Megías Homar, Guillem (Universitat Politècnica de Catalunya, 2019-07-10)
      Bachelor thesis
      Restricted access - author's decision

    • A polarized fast radio burst at low Galactic latitude 

      Rowlinson, A.; O'Sullivan, Michael; Anghinolfi, Marco; Anton, G.; Avgitas, T.; Bertin, V.; Puricelli, Stefano; Coniglione, R.; Gleixner, A; Lefèvre, Dominique; Michael, Turner; Pellegrino, Carlo; Piattelli, P.; Sanchez Losa, Agustín; Schnabel, J.; Trovato, A.; Zúñiga Román, Juan; Elejabarrieta, María Jesús; Schrenk, Bernhard; Hahn, James K.; Lamanna, G.; Moulin, Eric; Moya Señas, Ignacio; Santangelo, A; Schulz, André; Vink, J; Wagner, Peter; Yang, Rong; Zaborov, D.; André, Michel (2017-08-01)
      Article
      Open Access
      We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm-3, a ...

    • A remarkable recurrent nova in M 31: The predicted 2014 outburst in X-rays with Swift 

      Henze, Martin; Ness, J.; Darnley, M. J.; Bode, M. F.; Williams, S. C.; Shafter, A. W.; Sala Cladellas, Glòria; Kato, M.; Hachisu, I.; Hernanz Carbó, Margarita (2015-08-01)
      Article
      Open Access
      Context. The M 31 nova M31N 2008-12a was recently found to be a recurrent nova (RN) with a recurrence time of about one year. This is by far the fastest recurrence time scale of any known RN.; Aims. Our optical monitoring ...

    • A search for neutrino emission from the Fermi bubbles with the ANTARES telescope 

      Adrian Martinez, Silvia; Albert, A.; Al Samarai, Imen; André, Michel; Anton, G.; Anvar, S.; Ardid, M.; Astraatmadja, T.; Baret, B.; Basa, S.; Bertin, V.; Biagi, S.; Bogazzi, C.; Bouhou, B.; Brunner, J.; Morganti, M.; Schmidt, J.; Stolarczyk, Th. (2014-02-06)
      Article
      Open Access
      Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadronic models attempting to explain the origin ...

    • A search for secluded dark matter in the sun with the ANTARES neutrino telescope 

      Adrian Martinez, Silvia; Albert, A.; André, Michel (2016-05-05)
      Article
      Open Access
      A search for Secluded Dark Matter annihilation in the Sun using 2007-2012 data of the ANTARES neutrino telescope is presented. Three different cases are considered: a) detection of dimuons that result from the decay of the ...

    • A Trojan horse approach to the production of 18F in Novae 

      la Cognata, M; Pizzone, R; José Pont, Jordi; Hernanz Carbó, Margarita; Cherubini, S; Gulino, M; Rapisarda, G; Spitaleri, C (2017-09-01)
      Article
      Open Access
      Crucial information on nova nucleosynthesis can be potentially inferred from ¿-ray signals powered by 18F decay. Therefore, the reaction network producing and destroying this radioactive isotope has been extensively studied ...

    • Algunes experiències del grup de recerca gAGE sobre transferència tecnològica a l'àmbit de la navegació per satèl·lit. 

      Hernández, Manuel (2008-12-04)
      Audiovisual
      Open Access

    • All-flavor search for a diffuse flux of cosmic neutrinos with nine years of ANTARES data 

      Albert, A.; André, Michel; Anghinolfi, Marco; Anton, G.; Ardid Ramírez, Miguel (2018-01-20)
      Article
      Open Access
      The ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES, ...

    • All-sky search for high-energy neutrinos from gravitational wave event GW170104 with the Antares neutrino telescope: The ANTARES Collaboration 

      Albert, A.; André, Michel; Anghinolfi, Marco; Anton, G.; Ardid Ramírez, Miguel (2017-12-28)
      Article
      Open Access
      © 2017, The Author(s). Advanced LIGO detected a significant gravitational wave signal (GW170104) originating from the coalescence of two black holes during the second observation run on January 4th, 2017. An all-sky ...

    • An algorithm for the reconstruction of high-energy neutrino-induced particle showers and its application to the ANTARES neutrino telescope 

      Albert, A.; 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 (2017-06-21)
      Article
      Open Access
      A novel algorithm to reconstruct neutrino-induced particle showers within the ANTARES neutrino telescope is presented. The method achieves a median angular resolution of 6°6° for shower energies below 100 TeV. Applying ...

    • An algorithm for the reconstruction of neutrino-induced showers in the ANTARES Neutrino telescope 

      Albert, A.; André, Michel (2017-12-04)
      Article
      Open Access
      Muons created by nm charged current (CC) interactions in the water surrounding the ANTARES neutrino telescope have been almost exclusively used so far in searches for cosmic neutrino sources. Due to their long range, highly ...

    • Analysis of Interplanetary Coronal Mass Ejections Observed by STEREO and MESSENGER 

      González Álvarez, Marina (Universitat Politècnica de Catalunya, 2019-05-27)
      Bachelor thesis
      Open Access
      Covenantee:   National Aeronautics and Space Administration. Goddard Space Flight Center
      Coronal mass ejections (CMEs) expelled from the solar corona are a major space weather driver, both in space and on the ground. The fast-traveling CME plasma, which carries a twisted magnetic field, is a common source of ...

    • ANTARES and IceCube combined search for neutrino point-like and extended sources in the southern sky 

      André, Michel; Albert, A.; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aubert, J.-J.; Aublin, J.; Baret, B.; Basa, S.; Bertin, Vincent (Institute of Physics (IOP), 2020-04-01)
      Article
      Open Access
      A search for point-like and extended sources of cosmic neutrinos using data collected by the ANTARES and IceCube neutrino telescopes is presented. The data set consists of all the track-like and shower-like events pointing ...

    • ANTARES constrains a blazar origin of two IceCube PeV neutrino events 

      Adrian Martinez, Silvia; Albert, Andreas; André, Michel (2015-04-01)
      Article
      Open Access
      Context. The source(s) of the neutrino excess reported by the IceCube Collaboration is unknown. The TANAMI Collaboration recently reported on the multiwavelength emission of six bright, variable blazars which are positionally ...

    • ANTARES neutrino search for time and space correlations with IceCube high-energy neutrino events 

      André, Michel; Albert, A.; Anghinolfi, Marco; Anton, Gisela (Institute of Physics (IOP), 2019-07-10)
      Article
      Open Access
      In the past years, the IceCube Collaboration has reported in several analyses the observation of astrophysical high-energy neutrino events. Despite a compelling evidence for the first identification of a neutrino source, ...

    • Assessment of centre national d'Études spatiales real-time ionosphere maps in instantaneous precise real-time kinematic positioning over medium and long baselines 

      Tomaszewski, Dariusz; Wielgosz, Pawel; Rapinski, Jacek; Krypiak-Gregorczyk, Anna; Kazmierczak, Rafal; Hernández Pajares, Manuel; Yang, Heng; Orús Pérez, Raul (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-17)
      Article
      Open Access
      Precise real-time kinematic (RTK) Global Navigation Satellite System (GNSS) positioning requires fixing integer ambiguities after a short initialization time. Originally, it was assumed that it was only possible at a ...

    • Assessment of St. Patrick's Day 2015 Geomagnetic storm impact on EGNOS 

      Hernández Pajares, Manuel; Béniguel, Yannick; Orús Pérez, Raul; Prieto Cerdeira, Roberto; García Rigo, Alberto; Kinrade, J; Kauristie, Kirsti; Schlueter, Stefan; Serant, Damien; Krankowski, Andrzej; Secretan, Hugues; Sampedro Casis, Rodrigo; Prats Menéndez, Xavier (European Space Agency (ESA), 2015)
      Conference lecture
      Restricted access - publisher's policy
      The Monitor project has been designed to monitor ionospheric events that would allow evaluating its impact on European GNSS Systems. It includes a network of ionospheric scintillation monitoring stations in various ...

    • Assessment of the capabilities and applicability of ionospheric perturbation indices provided in Europe 

      Borries, Claudia; Wilken, Volken; Jacobsen, Knut Stanley; García Rigo, Alberto; Dziak-Jankowska, Beata; Kervalishvili, Guram; Jakowski, Norbert; Tsagouri, Ioanna; Hernández Pajares, Manuel; Ferreira, Arthur A.; Hoque, Mainul (2020-08-01)
      Article
      Open Access
      Perturbations in the ionosphere are of great interest not only for scientific research, but also for applications using transionospheric radiosignals (e.g. GNSS applications and HF communication), because the transmission ...

    • Astrophysical parameter determination using chaotic orbital regions 

      Nicolás Álvarez, Jorge (Universitat Politècnica de Catalunya, 2018-02-27)
      Master thesis
      Open Access
      Covenantee:   European Space Research and Technology Centre
      The goal of this thesis is to show that chaotic orbits of a dynamical system are advantageous (compared with regularnes) to determine the characteristic parameters of the system, and to give an estimate about the behaviour ...