Exploració per tema "Supernovae"

Ara es mostren els items 1-20 de 88

    • A Chandrasekhar mass progenitor for the type Ia supernova remnant 3C 397 from the enhanced abundances of nickel and manganese 

      Yamaguchi, H; Badenes Montoliu, Carles; Foster, Adam; Bravo Guil, Eduardo; Williams, Brian; Maeda, Keichi; Nobukawa, Masayoshi; Eriksen, Kristoffer; Brickhouse, Nancy; Petre, Robert; Koyama, Katsuyi (2015-03-12)
      Article
      Accés restringit per política de l'editorial
      Despite decades of intense efforts, many fundamental aspects of Type Ia supernovae (SNe Ia) remain elusive. One of the major open questions is whether the mass of an exploding white dwarf (WD) is close to the Chandrasekhar ...

    • A model grid for the spectral analysis of X-ray emission in young Type Ia supernova remnants 

      Badenes Montoliu, Carles; Bravo Guil, Eduardo; Borkowski, K.J. (2005-08)
      Article
      Accés restringit per política de l'editorial
      We address a new set of models for the spectral analysis of the X-ray emission from young, ejecta-dominated Type Ia supernova remnants. These models are based on hydrodynamic simulations of the interaction between Type Ia ...

    • A moderately-sized nuclear network to assist multi-D hydrodynamic simulations of supernova explosions 

      Sanz, Axel; Cabezón Gómez, Rubén Martín; García Senz, Domingo (2022)
      Article
      Accés obert
      A key ingredient in any numerical study of supernova explosions is the nuclear network routine that is coupled with the hydrodynamic simulation code. When these studies are performed in more than one dimension, the size ...

    • A new kind of type I supernovae? 

      Isern Vilaboy, Jordi; Bravo Guil, Eduardo; Domínguez, Inmaculada (Istituto Nazionale di Astrofisica, 2000-12)
      Article
      Accés obert
      In this paper we examine the consequences of the propagation of a slow deflagration front through a C-0 white dwarf that leads to the formation of a marginally bound remnant. This situation corresponds to the transition ...

    • A particle code for deflagrations in white dwarfs. I. Numerical techniques 

      García Senz, Domingo; Bravo Guil, Eduardo; Serichol Augué, Núria (1998-03)
      Article
      Accés restringit per política de l'editorial
      In this paper we report some specific features of the numerical technique used to study the dynamic evolution of massive white dwarfs following the explosive ignition of nuclear fuel under degenerate conditions. We focus ...

    • A Super-solar metallicity for the progenitor of Kepler's supernova 

      Park, Sangwook; Badenes Montoliu, Carles; Mori, Koji; Kaida, Ryohei; Bravo Guil, Eduardo; Schenck, Andrew; Eriksen, Kristoffer A.; Hughes, John P.; Slane, Patrick O.; Burrows, David N.; Lee, Jae-Joon (2013-04)
      Article
      Accés obert
      We have performed deep X-ray observations of the remnant of Kepler's supernova (SN 1604) as a Key Project of the Suzaku Observatory. Our main goal is to detect secondary Fe-peak elements in the supernova (SN) ejecta to ...

    • A three-dimensional picture of the delayed-detonation model of type Ia supernovae 

      Bravo Guil, Eduardo; García Senz, Domingo (2008-02)
      Article
      Accés obert
      Aims. Deflagration models poorly explain the observed diversity of SNIa. Current multidimensional simulations of SNIa predict a significant amount of, so far unobserved, carbon and oxygen moving at low velocities. It has ...

    • Analysis of extremely metal-poor stars abundances 

      Rivero Sosa, Nathaniel (Universitat Politècnica de Catalunya, 2023-07-25)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      Context: Understanding the origin of the oldest stars in the universe is crucial to shed light on its early chemical evolution and on the formation history of the Milky Way. The oldest stars were either the direct heirs ...

    • Are the models for type Ia supernova progenitors consistent with the properties of supernova remnants? 

      Badenes Montoliu, Carles; Hughes, J.P.; Bravo Guil, Eduardo; Langer, N. (2007-06)
      Article
      Accés restringit per política de l'editorial
      We explore the relationship between the models for progenitor systems of Type Ia supernovae and the properties of the supernova remnants that evolve after the explosion. Most models for Type Ia progenitors in the ...

    • Axisymmetric smoothed particle hydrodynamics with self-gravity 

      García Senz, Domingo; Relano, A; Cabezón Gómez, Rubén Martín; Bravo Guil, Eduardo (2009-01)
      Article
      Accés obert
      The axisymmetric form of the hydrodynamic equations within the smoothed particle hydrodynamics (SPH) formalism is presented and checked using idealized scenarios taken from astrophysics (free fall collapse, implosion and ...

    • Beyond the bubble catastrophe of type Ia supernovae: Pulsating reverse detonation models 

      Bravo Guil, Eduardo; García Senz, Domingo (2006-05)
      Article
      Accés restringit per política de l'editorial

    • 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
      Accés obert
      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, ...

    • Chandrasekhar and sub-Chandrasekhar models for the x-ray emission of type Ia Supernova remnants. I. Bulk properties 

      Martinez Rodriguez, Hector; Badenes Montoliu, Carles; Lee, Shiu-Hang; Patnaude, Daniel J.; Foster, Adam; Yamaguchi, Hiroya; Auchettl, Katie; Bravo Guil, Eduardo; Slane, Patrick O.; Piro, Anthony; Park, Sangwook; Nagataki, Shigehiro (Institute of Physics (IOP), 2018-10-03)
      Article
      Accés obert
      Type Ia supernovae originate from the explosion of carbon–oxygen white dwarfs in binary systems, but the exact nature of their progenitors remains elusive. The bulk properties of Type Ia supernova remnants, such as the ...

    • Clues to type ia supernovae progenitors from degenerate carbon ignition models 

      Bravo Guil, Eduardo; Tornambé, A; Domínguez, Inmaculada; Isern Vilaboy, Jordi (1996-04)
      Article
      Accés obert

    • Cobalt-56 gamma-ray emission lines from the type Ia supernova 2014J 

      Churazov, Eugene; Sunyaev, Rashid; Isern Vilaboy, Jordi; Knodlseder, Jurgen; Jean, Pierre; Lebrun, François; Chugai, Nikolai; Grebenev, Sergei; Bravo Guil, Eduardo; Sazonov, Sergei; Renaud, Matthieu (2014-08-28)
      Article
      Accés restringit per política de l'editorial
      A type Ia supernova is thought to be a thermonuclear explosion of either a single carbon–oxygen white dwarf or a pair of merging white dwarfs. The explosion fuses a large amount of radioactive 56Ni. After the explosion, ...

    • Collision of detonation waves and its implications in the nucleosynthesis of Type Ia supernovae 

      García Senz, Domingo; Bravo Guil, Eduardo (2001-05)
      Article
      Accés restringit per política de l'editorial

    • Composition of the innermost core-collapse supernova ejecta 

      Fröhlich, C; Hauser, P; Liebendörfer, M; Martínez, G; Thielemann, F -K; Bravo Guil, Eduardo; Zinner, N T; Hix, W R; Langanke, K; Mezzacappa, A; Nomoto, K (2006-01)
      Article
      Accés restringit per política de l'editorial
      With currently known input physics and computer simulations in one dimension, a self-consistent treatment of core-collapse supernovae does not yet lead to successful explosions, while two-dimensional models show some ...

    • Consequences of the Collision Between the Gas Ejected in the Collapse of a White Dwarf and a Low-Mass Star 

      Serichol Augué, Núria; García Senz, Domingo; Bravo Guil, Eduardo (1998-06)
      Article
      Accés restringit per política de l'editorial

    • Constraining deflagration models of type Ia supernovae through intermediate-mass elements 

      García Senz, Domingo; Bravo Guil, Eduardo; Cabezón Gómez, Rubén Martín; Woosley, S E (2007-05)
      Article
      Accés restringit per política de l'editorial
      The physical structure of a nuclear flame is a basic ingredient of the theory of Type Ia supernovae (SNe Ia). Assuming an exponential density reduction with several characteristic times, we have followed the evolution of ...

    • 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
      Accés obert
      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 ...