Now showing items 1-20 of 107

  • A common origin of magnetism from planets to white dwarfs 

    Isern Vilaboy, Jordi; García-Berro Montilla, Enrique; Kulebi, Baybar; Lorén Aguilar, Pablo (2017-02-20)
    Article
    Open Access
    Isolated magnetic white dwarfs have field strengths ranging from kilogauss to gigagauss. However, the origin of the magnetic field has not been hitherto elucidated. Whether these fields are fossil, hence the remnants of ...
  • Algorithm specification for the Magnetic Diagnostics onboard LPF 

    Díaz Aguiló, Marc; García-Berro Montilla, Enrique; Lobo Gutiérrez, José Alberto (2010-01-02)
    External research report
    Open Access
    Document tècnic per la missió espacial LISA Pathfinder. Missió espacial de l'Agència Espacial Europea (ESA).
  • An asteroseismic constraint on the mass of the axion from the period drift of the pulsating da white dwarf star L19-2 

    Córsico, Alejandro H.; Romero, Alejandra Daniela; Althaus, Leandro G.; García-Berro Montilla, Enrique; Isern Vilaboy, Jordi; Kepler, S.O.; Miller Bartolami, Marcelo M.; Sullivan, Denis J. (2016-07-01)
    Article
    Open Access
    We employ an asteroseismic model of L19-2, a relatively massive (Msstarf ~ 0.75 M¿) and hot (Teff ~ 12 100 K) pulsating DA (H-rich atmosphere) white dwarf star (DAV or ZZ Ceti variable), and use the observed values of the ...
  • A population synthesis study of the luminosity function of hot white dwarfs 

    Torres Gil, Santiago; García-Berro Montilla, Enrique; Krzesinski, Jurek; Kleinman, Scot J. (2014-03-05)
    Article
    Open Access
    Context. We present a coherent and detailed Monte Carlo simulation of the population of hot white dwarfs. We assess the statistical significance of the hot end of the white dwarf luminosity function and the role played by ...
  • A population synthesis study of the MS+WD population in the SDSS 

    García-Berro Montilla, Enrique; Torres Gil, Santiago; Camacho Díaz, Judit; Rebassa Mansergas, Alberto; Gänsicke, Boris T.; Schreiber, Mathias R.; Zorotovic, Mónica (2014)
    Conference lecture
    Restricted access - publisher's policy
  • A population synthesis study of the MS+WD population in the SDSS 

    García-Berro Montilla, Enrique; Torres Gil, Santiago; Camacho Díaz, Judit; Rebassa Mansergas, Alberto; Gänsicke, Boris T.; Schreiber, Mathias R.; Zorotovic, Mónica (Astronomical Society of the Pacific Conference Series (ASP), 2015-06-01)
    Article
    Open Access
    Detached white dwarf + main sequence (WD+MS) systems represent the simplest population of post-common envelope binaries (PCEBs), and their ensemble properties carry important information about common-envelope phase. However, ...
  • A population synthesis study of white dwarf-main sequence binaries in the galactic disk 

    Rebassa Mansergas, Alberto; García-Berro Montilla, Enrique; Torres Gil, Santiago (2017)
    Conference report
    Open Access
    The companion mass ratio distribution (CMRD) of main sequence binaries is a crucial physical quantity for understanding the evolution of stars in binary systems and for constraining models of binary star formation. However, ...
  • A white dwarf merger as progenitor of the anomalous X-Ray pulsar 4U 0142+61? 

    Rueda, Jorge A.; Boshkayev, K.; Izzo, L.; Ruffini, R.; Lorén Aguilar, Pablo; Kuelebi, B.; Aznar Siguan, Gabriela; García-Berro Montilla, Enrique (2013-08)
    Article
    Open Access
    It has been recently proposed that massive, fast-rotating, highly magnetized white dwarfs could describe the observational properties of some of soft gamma-ray repeaters and anomalous X-ray pulsars (AXPs). Moreover, it has ...
  • Axions and the luminosity function of white dwarfs : the thin and thick discs, and the halo 

    Isern Vilaboy, Jordi; García-Berro Montilla, Enrique; Torres Gil, Santiago; Cojocaru, Elena Ruxandra; Catalán, S (Oxford University Press, 2018-08-01)
    Article
    Open Access
    The evolution of white dwarfs is a simple gravothermal process of cooling. Since the shape of their luminosity function is sensitive to the characteristic cooling time, it is possible to use its slope to test the existence ...
  • Bounds on the possible evolution of the gravitational constant from cosmological type-Ia supernovae 

    Gaztañaga, E.; García-Berro Montilla, Enrique; Isern Vilaboy, Jordi; Bravo Guil, Eduardo; Domínguez, Inmaculada (2002-01)
    Article
    Open Access
    Recent high-redshift type-Ia supernovae results can be used to set new bounds on a possible variation of the gravitational constant G. If the local value of G at the space-time location of distant supernovae is different, ...
  • Classical and recurrent nova models 

    José Pont, Jordi; Casanova Bustamante, Jordi; García-Berro Montilla, Enrique; Hernanz Carbó, Margarita; Shore, Steven N.; Calder, A. (2011)
    Conference lecture
    Open Access
    Remarkable progress in the understanding of nova outbursts has been achieved through combined efforts in photometry, spectroscopy and numerical simulations. According to the thermonuclear runaway model, novae are powered ...
  • Comparison of theoretical white dwarf cooling timescales (Research Note) 

    Salaris, Maurizio; Althaus, Leandro Gabriel; García-Berro Montilla, Enrique (2013-07)
    Article
    Open Access
    Context. An accurate assessment of white dwarf cooling times is paramount so that white dwarf cosmochronology of Galactic populations can be put on more solid grounds. This issue is particularly relevant in view of the ...
  • Constraining the double-degenerate scenario for Type Ia supernovae from merger ejected matter 

    Levanon, Naveh; Soker, Noam; García-Berro Montilla, Enrique (2015-03-01)
    Article
    Open Access
    We follow the mass expelled during the WD-WD merger process in a particular case of the double-degenerate (DD) scenario for Type Ia supernovae (SNe Ia), and find that the interaction of the SN ejecta with the resulting ...
  • Constraining the neutrino magnetic dipole moment from white dwarf pulsations 

    Corsico, Alejandro H.; Althaus, Leandro G.; Miller Bartolami, Marcelo M.; Kepler, S.O.; García-Berro Montilla, Enrique (2014-08-01)
    Article
    Open Access
    Pulsating white dwarf stars can be used as astrophysical laboratories to constrain the properties of weakly interacting particles. Comparing the cooling rates of these stars with the expected values from theoretical models ...
  • DA white dwarfs from the LSS-GAC survey DR1: the preliminary luminosity and mass functions and formation rate 

    Rebassa Mansergas, Alberto; Cojocaru, Elena Ruxandra; Torres, S.; García-Berro Montilla, Enrique; Liu, X.; Yuan, H-B.; Xiang, M.-X.; Huang, Y.; Koester, D.; Hou, Y.; Li, G.; Zhang, Y. (2015-06-11)
    Article
    Open Access
    Modern large-scale surveys have allowed the identification of large numbers of white dwarfs. However, these surveys are subject to complicated target selection algorithms, which make it almost impossible to quantify to ...
  • Design of the magnetic diagnostics unit onboard LISA Pathfinder 

    Díaz Aguiló, Marc; Mateos, Ignacio; Ramos Castro, Juan José; Lobo, J.A.; García-Berro Montilla, Enrique (2013-04)
    Article
    Open Access
    LISA (Laser Interferometer Space Antenna) is a joint mission of ESA and NASA which aims to be the first space-borne gravitational wave observatory. Due to the high complexity and technological challenges that LISA will ...
  • Detonations in white dwarf dynamical interactions 

    Aznar Siguan, Gabriela; García-Berro Montilla, Enrique; Lorén Aguilar, Pablo; José Pont, Jordi; Isern Vilaboy, Jordi (2013)
    Article
    Open Access
    n old, dense stellar systems collisions of white dwarfs are a rather frequent phenomenon. Here we present the results of a comprehensive set of Smoothed Particle Hydrodynamics simulations of close encounters of white ...
  • Docencia e investigación: ¿un falso dilema? 

    García-Berro Montilla, Enrique; Amblàs, Gemma; Sallarés, Jordi; Bugeda Castelltort, Gabriel; Roca, Santiago (2013-05-01)
    Article
    Open Access
  • Double degenerate mergers as progenitors of high-field magnetic white dwarfs 

    García-Berro Montilla, Enrique; Lorén Aguilar, Pablo; Aznar Siguan, Gabriela; Torres Gil, Santiago; Camacho Díaz, Judit; Althaus, Leandro Gabriel; Córsico, Alejando Hugo; Kulebi, Baybar; Isern Vilaboy, Jordi (2011-04-10)
    Article
    Open Access
    High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mech anism that produces the magnetic field are still unknown. ...
  • Effectiveness of Problem Based Learning for Engineering Curriculum 

    Rojas Gregorio, José Ignacio; Prats Menéndez, Xavier; Villardi de Montlaur, Adeline de; Valero García, Miguel; García-Berro Montilla, Enrique (IGI Global, 2010)
    Part of book or chapter of book
    Open Access
    The main purpose of this paper is to describe the process by which an initially limited-range practical experience, within the frame of a given subject in an aerospace engineering degree, might be expanded to become the ...