Astrofísicas: Nucleosíntesis

  • Publicación
    Hot bottom burning and s-process nucleosynthesis in massive AGB stars at the beginning of the thermally-pulsing phase
    We report the first spectroscopic identification of massive Galactic asymptotic giant branch (AGB) stars at the beginning of the thermal pulse (TP) phase. These...
  • Publicación
    Identification of Near-infrared [Se iii] and [Kr vi] Emission Lines in Planetary Nebulae
    We identify [Se iii] 1.0994 μm in the planetary nebula (PN) NGC 5315 and [Kr vi] 1.2330 μm in three PNe from spectra obtained with the Folded-Port InfraRed...
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    Lithium and zirconium abundances in massive Galactic O-rich AGB stars
    Lithium and zirconium abundances (the latter taken as representative of s-process enrichment) are determined for a large sample of massive Galactic O-rich AGB...
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    Low deuterium abundance in the z_abs=3.514 absorber towards APM 08279+5255
    {A high-resolution, high signal-to-noise HIRES-Keck spectrum of APM 08279+5255 reveals a feature in the HI Lyalpha profile of the z_abs=3.514 absorber at the...
  • Publicación
    Low-mass low-metallicity AGB stars as an efficient i-process site explaining CEMP-rs stars
    Context. Among carbon-enhanced metal-poor (CEMP) stars, some are found to be enriched in slow-neutron capture (s-process) elements (and are then tagged CEMP-s)...
  • Publicación
    Low-mass low-metallicity AGB stars as an efficient i-process site explaining CEMP-rs stars (Corrigendum)
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    Microstructures of Planetary Nebulae with Large Telescopes
    Planetary nebulae (PNe) are known to possess a variety of small-scale structures that are usually in a lower ionization state than the main body of the nebulae...
  • Publicación
    Neutron-capture Element Abundances in Magellanic Cloud Planetary Nebulae
    We present near-infrared spectra of 10 planetary nebulae (PNe) in the Large and Small Magellanic Clouds (LMC and SMC), acquired with the FIRE and GNIRS...
  • Publicación
    Neutron-capture Elements in Planetary Nebulae: First Detections of Near-infrared [Te III] and [Br V] Emission Lines
    We have identified two new near-infrared (NIR) emission lines in the spectra of planetary nebulae arising from heavy elements produced by neutron-capture...