Exploració per autor "Aznar Siguan, Gabriela"

Ara es mostren els items 1-11 de 11

    • 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
      Accés obert
      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 ...

    • Detonations in white dwarf dynamical interactions 

      Aznar Siguan, Gabriela; García-Berro Montilla, Enrique; Lorén Aguilar, Pablo; José Pont, Jordi; Isern Vilaboy, Jordi (2013)
      Article
      Accés obert
      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 ...

    • 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
      Accés obert
      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. ...

    • Enfoca la física : una revisió amb història 

      Álvarez Lacalle, Enrique; Aznar Siguan, Gabriela (Universitat Politècnica de Catalunya / Iniciativa Digital Politècnica, 2013)
      Llibre
      Accés obert
      Quan tot just ens acaben d'explicar una cosa, aquesta no acaba de tenir gaire sentit. No s'acaba d'enfocar. I, molt sovint, la falta d'enfocament dura anys. Aquest llibre voldria ajudar a tothom a recol·locar i entendre ...

    • On the origin of high-field magnetic white dwarfs 

      García-Berro Montilla, Enrique; Torres Gil, Santiago; Lorén Aguilar, Pablo; Aznar Siguan, Gabriela; Camacho Díaz, Judit; Kulebi, Baybar; Isern Vilaboy, Jordi; Althaus, Leandro Gabriel; Corsico, Alejandro H. (Astronomical Society of the Pacific, 2013-01-01)
      Comunicació de congrés
      Accés obert
      Every two years, white dwarf researchers and enthusiasts meet to exchange their knowledge and discuss recent developments in white dwarf theory and observations. These proceedings are from the 18th European White Dwarf ...

    • Smoothed particle hydrodynamics simulations of the core-degenerate scenario for Type Ia supernovae 

      Aznar Siguan, Gabriela; García-Berro Montilla, Enrique; Lorén Aguilar, Pablo; Soker, Noam; Kashi, Amit (2015-07-01)
      Article
      Accés obert
      The core-degenerate scenario for Type Ia supernovae involves the merger of the hot core of an asymptotic giant branch star and a white dwarf, and might contribute a non-negligible fraction of all thermonuclear supernovae. ...

    • Smoothed Particle Hydrodynamics simulations of white dwarf close encounters in dense stellar systems 

      Aznar Siguan, Gabriela (Universitat Politècnica de Catalunya, 2011-09-22)
      Projecte Final de Màster Oficial
      Accés obert
      English: In old dense stellar systems collisions of white dwarfs are a rather frequent phenomenon. Here we present the results of several Smoothed Particle Hydrodynamics simulations of close encounters of white dwarfs to ...

    • Spiral instability can drive thermonuclear explosions in binary white dwarf mergers 

      kashyap, Rahul; Fisher, Robert T.; García-Berro Montilla, Enrique; Aznar Siguan, Gabriela; Ji, Suoqing; Lorén Aguilar, Pablo (2015-02-10)
      Article
      Accés obert
      Thermonuclear, or Type Ia supernovae (SNe Ia), originate from the explosion of carbon-oxygen white dwarfs, and serve as standardizable cosmological candles. However, despite their importance, the nature of the progenitor ...

    • The response of a helium white dwarf to an exploding Type Ia supernova 

      Papish, Oded; Soker, Noam; García-Berro Montilla, Enrique; Aznar Siguan, Gabriela (2015-05-01)
      Article
      Accés obert
      We conduct numerical simulations of the interacting ejecta from an exploding CO white dwarf (WD) with a He WD donor in the double-detonation scenario for Type Ia supernovae (SNe Ia), and study the possibility of exploding ...

    • White dwarf dynamical interactions 

      Aznar Siguan, Gabriela (Universitat Politècnica de Catalunya, 2015-04-30)
      Tesi
      Accés obert
      Merging white dwarfs is a promising channel to trigger Type Ia supernovae, known as the double degenerate scenario. Supernovae are stellar explosions that radiate as much energy as any ordinary star is expected to emit ...

    • White dwarf dynamical interactions and fast optical transients 

      García-Berro Montilla, Enrique; Badenes Montoliu, Carles; Aznar Siguan, Gabriela; Lorén Aguilar, Pablo (2017-07-01)
      Article
      Accés obert
      Recent advances in time-domain astronomy have uncovered a new class of optical transients with time-scales shorter than typical supernovae and a wide range of peak luminosities. Several subtypes have been identified within ...