Astrofísicas: Nucleosíntesis

  • Publicación
    Physical Conditions of the Planetary Nebula NGC 5315 Derived from VLT Echelle Observations and the t2 Problem
    Echelle spectrophotometry of the planetary nebula NGC 5315 is presented. The data consist of VLT UVES observations in the 3100-10450 Å range. The intensities of...
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    Probing O-enrichment in C-rich dust planetary nebulae
    The abundance of O in planetary nebulae (PNe) has been historically used as a metallicity indicator of the interstellar medium (ISM), where they originated; e.g...
  • Publicación
    Rb-Rich Asymptotic Giant Branch Stars in the Magellanic Clouds
    We present high-resolution (R ~ 60,000) optical spectra of a carefully selected sample of heavily obscured and presumably massive O-rich asymptotic giant branch...
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    Rubidium abundances in solar metallicity stars
    Context. Rubidium is one of the few elements produced by the neutron capture s- and r-processes in almost equal proportions. Recently, a Rb deficiency ([Rb/Fe]...
  • Publicación
    Rubidium and zirconium abundances in massive Galactic asymptotic giant branch stars revisited
    Context. Luminous Galactic OH/IR stars have been identified as massive (>4-5 M⊙) asymptotic giant branch (AGB) stars experiencing hot bottom burning and Li...
  • Publicación
    Rubidium and Zirconium Production in Massive AGB Stars
    A recent survey of a large sample of massive Galactic asymptotic giant branch (AGB) stars shows that significant overabundances of rubidium (up to 100 times...
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    Rubidium, zirconium, and lithium production in intermediate-mass asymptotic giant branch stars
    Context. A recent survey of a large sample of Galactic intermediate-mass (>3 M&sun;) asymptotic giant branch (AGB) stars shows that they exhibit large...
  • Charla
    Rubidium-rich asymptotic giant branch stars in the Magellanic Clouds
    Asymptotic Giant Branch (AGB) stars are a principal source of gas and dust input into the interstellar medium, being an important driver of chemical evolution...
  • Publicación
    S-process nucleosynthesis in AGB models with the FST prescription for convection
    The chemical evolution of asymptotic giant branch (AGB) stars depends greatly on the input physics (e.g., mass loss recipe, convective model). Variations in the...