Now showing items 1-14 of 14

    • Accretion onto Neutron Stars: Hydrodynamics and Nucleosynthesis 

      Moreno Guzmán, Fermín (Universitat Politècnica de Catalunya, 2009-11-25)
      Doctoral thesis
      Open Access
      In the middle of the 70s, some authors suggested that accretion of hydrogen and helium rich material by a neutron star in a binary system, where the companion star would have low mass, could explain thermonuclear bursts ...
    • Constraining the origin of the short timescales X-ray variability of the Seyfert galaxy NGC 7469 

      Núñez Arilla, Carlos (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      Covenantee:   Nicolaus Copernicus Astronomical Center
      This bachelor thesis is a small part of a much larger project related to the study of the X-ray properties of the active galactic nucleus (AGN) NGC 7469. In this report I will focus on the analysis of the short-timescales ...
    • Design and construction of a 3D Helmholtz coil system for the ALBA magnetic measurements laboratory 

      Fontanet Valls, Andrea del Carme (Universitat Politècnica de Catalunya, 2019-06)
      Bachelor thesis
      Open Access
      Covenantee:   Sincrotró ALBA
      3D Hall probes designed and produced by ALBA Synchrotron are currently being used at ALBA magnetic measurements laboratory to carry out accurate magnetic characterization of magnets and insertion devices. In order to ...
    • El Ascensor espacial 

      Edwards, Bradley C. (Edicions UPC, 2010)
      Book
      Restricted access to UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC users
      Cincuenta años después de que el Sputnik sobrevolara la Tierra a menos de 1.000 km de altitud, circunstancia que despertó dosis similares de recelo y admiración, la exploración espacial sigue sustentándose en cohetes que ...
    • Mission Analysis for Google Lunar X-Prize Participants: Options for going to the Moon 

      Maitre -, Boris (Universitat Politècnica de Catalunya, 2010-07-15)
      Master thesis
      Open Access
    • Modelling and simulation of plasma heating with ICRF waves in JET tokamak 

      Planas Parra, Eric (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      One of the challenges that magnetic confinement fusion faces is achieving extreme temperatures inside the reactors. Absorption of electromagnetic waves in the ion cyclotron range of frequencies (ICRF) has demonstrated ...
    • Models for Type I X-Ray Bursts Nucleosynthesis with Parallelisation and Improved Nuclear Physics 

      Martin Rodriguez, Jose-David (Universitat Politècnica de Catalunya, 2012-02-03)
      Master thesis
      Open Access
      Type I XRBs are thermonuclear flashes on the surface of neutron stars (NS) associated with mass-accretion from a companion star. Models of type I XRBs and their associated nucleosynthesis are physically complicated and ...
    • Models of classical novae with MESA 

      Abril Pla, Oriol (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      Classical novae are thermonuclear runaways at the envelope of a WD due to the piling up of H-rich accreted material. They have been observed to produce heavy elements during the explosion, and their role in galactical ...
    • Multi-dimensional simulations of mixing in classical novae 

      Casanova Bustamante, Jordi (Universitat Politècnica de Catalunya, 2011-11-03)
      Doctoral thesis
      Open Access
      Classical nova explosions are stellar explosions that take place in close binary systems with an energy release only exceeded by gamma-ray bursts and supernova explosions. Matter from the white dwarf flows through the inner ...
    • Nonlinear one-zone models of stellar pulsations 

      Munteanu, Andreea (Universitat Politècnica de Catalunya, 2003-12-16)
      Doctoral thesis
      Open Access
      Nuestro trabajo se ha concentrado en la simulación y el análisis de modelos no-lineales aplicados a las curvas de luz ópticas de estrellas variables de largo periodo. Cuando las estrellas de masa pequeña o intermedia (de ...
    • Spectroscopy of nearby white dwarfs & identification of double white dwarfs in common proper motion pairs 

      Perpinyà Vallés, Martí (Universitat Politècnica de Catalunya, 2018-07)
      Bachelor thesis
      Open Access
      Covenantee:   University of Warwick
      On the one hand, this project presents a background in both White Dwarfs and spectroscopy. Some data from Warwick University Astrophysics? Group has been studied and these spectroscopic results are introduced in order to ...
    • Study of the kink instability and twist distribution of heliospheric magnetic flux ropes 

      Florido Llinàs, Marta (Universitat Politècnica de Catalunya, 2020-05-26)
      Bachelor thesis
      Open Access
      Covenantee:   NASA - Goddard Space Flight Center
      Les cordes de flux magnètic (MFRs) són estructures fonamentals del plasma en què les línies de camp magnètic es troben retorçades al voltant d’un eix. Apareixen en molts fenòmens de l’heliosfera, incloent un dels principals ...
    • Tests hidrodinàmics amb el codi multidimensional FLASH 

      Casanova i Bustamante, Jordi (Universitat Politècnica de Catalunya, 2007-09-12)
      Master thesis
      Open Access
      El FLASH és un codi estable i flexible, desenvolupat a la Universitat de Chicago, que permet estudiar diferents fenòmens hidrodinàmics. L'objectiu futur és desenvolupar models multidimensionals centrats en el camp de les ...
    • Three-dimensional hydrodynamic simulations of dynamos in white dwarfs 

      Marco Rimmek, Joan (Universitat Politècnica de Catalunya, 2018-02-06)
      Bachelor thesis
      Open Access
      Covenantee:   University of Exeter
      The origin of magnetic white dwarfs is still a controversial issue. When white dwarfs cool enough, they crystallize. This causes a phase separation of its main constituents in the nucleus, leaving a less dense liquid behind ...