Exploració per tema "binaries: close"

Ara es mostren els items 1-10 de 10

    • 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 ...

    • Oxygen-neon-rich merger during common envelope evolution 

      Canals, Pere; Torres Gil, Santiago; Soker, Noam (Oxford University Press, 2018-11-01)
      Article
      Accés obert
      We conduct a population synthesis study of the common envelope evolution (CEE) of a white dwarf (WD) and an asymptotic giant branch (AGB) star and find that the potential number of type Ia supernovae (SNe Ia) from the core ...

    • Properties of the redback millisecond pulsar binary 3FGLJ0212.1+5320 

      Shahbaz, T.; Linares Alegret, Manuel; Breton, R. P. (2017-12-01)
      Article
      Accés obert
      Linares et al. obtained quasi-simultaneous g¿-, r¿- and i¿-band light curves and an absorption-line radial velocity curve of the secondary star in the redback system 3FGL¿J0212.1+5320. The light curves showed two maxima ...

    • 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. ...

    • The effects of unresolved double degenerates in the white dwarf luminosity function 

      Rebassa Mansergas, Alberto; Torres Gil, Santiago (Oxford University Press, 2020-02-01)
      Article
      Accés restringit per política de l'editorial
      We perform an analysis of the single white dwarf and the double degenerate binary populations in the solar neighbourhood following a population synthesis approach to investigate the effects of unresolved double degenerates ...

    • 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 ...

    • The SDSS spectroscopic catalogue of white dwarf-main-sequence binaries: new identifications from DR 9–12 

      Rebassa Mansergas, Alberto; Ren, J. J.; Parsons, S. G.; Gänsicke, Boris T.; Schreiber, Mathias R.; García-Berro Montilla, Enrique; Liu, X.; Koester, D. (2016-06-01)
      Article
      Accés obert
      We present an updated version of the spectroscopic catalogue of white dwarf-main-sequence (WDMS) binaries from the Sloan Digital Sky Survey (SDSS). We identify 938 WDMS binaries within the data releases (DR) 9-12 of SDSS ...

    • The white dwarf binary pathways survey - I. A sample of FGK stars with white dwarf companions 

      Parsons, S. G.; Rebassa Mansergas, Alberto; Schreiber, Mathias R.; Gänsicke, Boris T.; Zorotovic, Mónica; Ren, J. J. (2016-12-01)
      Article
      Accés obert
      The number of spatially unresolved white dwarf plus main-sequence star binaries has increased rapidly in the last decade, jumping from only ~30 in 2003 to over 3000. However, in the majority of known systems the companion ...

    • Using large spectroscopic surveys to test the double degenerate model for Type Ia supernovae 

      Breedt, E.; Steeghs, Dani; Marsh, T. R.; Gentile Fusillo, N. P.; Tremblay, P. E.; Green, M.; De Pasquale, S.; Hermes, J. J.; Gänsicke, Boris T.; Parsons, S. G.; Bours, M. C. P.; Longa Peña, P.; Rebassa Mansergas, Alberto (2017-02-20)
      Article
      Accés obert
      An observational constraint on the contribution of double degenerates to Type Ia supernovae requires multiple radial velocity measurements of ideally thousands of white dwarfs. This is because only a small fraction of the ...

    • White dwarf-main sequence binaries from LAMOST: the DR5 catalogue 

      Ren, J. J.; Rebassa Mansergas, Alberto; Parsons, S. G.; Liu, X. W; Luo, Jun; Kong, X; Zhang, C. (Oxford University Press, 2018-07-01)
      Article
      Accés obert
      We present the data release (DR) 5 catalogue of white dwarf–main sequence (WDMS) binaries from the Large sky Area Multi-Object fibre Spectroscopic Telescope (LAMOST). The catalogue contains 876 WDMS binaries, of which 757 ...