Now showing items 1-4 of 4

  • Equivalence of Boltzmann and moment equations 

    Cubarsí Morera, Rafael (2010-10-28)
    Open Access
    The closure problem for the stellar hydrodynamic equations is studied by describing the family of phase space density functions, for which the collisionless Boltzmann equation is strictly equivalent to a finite subset of ...
  • Is the metallicity of their host galaxies a good measure of the metallicity of Type Ia supernovae? 

    Bravo Guil, Eduardo; Badenes Montoliu, Carles (2011-06)
    Open Access
    The efficient use of Type Ia supernovae (SNIa) for cosmological studies requires knowledge of any parameter that can affect their luminosity in either systematic or statistical ways. Observational samples of SNIa commonly ...
  • Rings and spirals in barred galaxies III. Further comparisons and links to observations 

    Masdemont Soler, Josep; Bosma, A.; Romero Gómez, Mercè; Athanassoula, Evangelie (2010)
    Restricted access - publisher's policy
    In a series of papers, we propose a theory to explain the formation and properties of rings and spirals in barred galaxies. The building blocks of these structures are orbits guided by the manifolds emanating from the ...
  • Un planeta con dos soles. ¿Tatooine o Kepler-16b? 

    Moreno Lupiáñez, Manuel (2011-10-25)
    External research report
    Open Access
    La existencia de un mundo con atardeceres dobles, similar al que se mostró en la película "Star Wars" hace más de 30 años, ya es un hecho científico. La misión Kepler, de la Nasa, ha logrado la primera detección directa ...