Astrofísicas: Nebulosas planetarias

  • Publicación
    Chemistry in the dIrr galaxy Leo A
    We present chemical abundance determinations of two H II regions in the dwarf irregular (dIrr) galaxy Leo A from Gran Telescopio Canarias (GTC) Optical System...
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    Circumstellar PAHs in IRAS 16594-4656: a new proto-planetary nebula with a strong 21mum dust feature
    Based on ISO SWS+LWS observations, we identify IRAS 16594-4656 as a new member of the rare class of C-rich proto-planetary nebulae with the 21 μm dust feature...
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    Close binary central stars and the abundance discrepancy - new extreme objects
    Recent work (Corradi et al. 2015; Jones et al. 2016) has shown that the phenomenon of extreme abundance discrepancies, where recombination line abundances...
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    CO content of bipolar planetary nebulae
    We report high-sensitivity millimeter-wave CO observations of recently discovered bipolar planetary nebulae (PNe). Three objects (BV 5-1, K 3-94 and K 3-24)...
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    Co-spatial Long-slit UV/Optical AL Spectra of 10 Galactic Planetary Nebulae with HST/STIS. I. Description of the Observations, Global Emission-line Measurements, and CNO Abundances
    We present observations and initial analysis from a Hubble Space Telescope (HST) Cycle 19 program using STIS to obtain the first co-spatial, UV–optical spectra...
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    Co-spatial Long-slit UV/Optical Spectra of Ten Galactic Planetary Nebulae with HST/STIS. II. Nebular Models, Central Star Properties, and He+CNO Synthesis
    The goal of the present study is twofold. First, we employ new HST/STIS spectra and photoionization modeling techniques to determine the progenitor masses of...
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    Co-spatial UV-optical HST/STIS spectra of six planetary nebulae: nebular and stellar properties
    This paper represents the conclusion of a project that had two main goals: (1) to investigate to what extent planetary nebulae (PNe) are chemically homogeneous...
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    Condiciones Físicas en Nebulosas Gaseosas
    El presente trabajo se ha enfocado a determinar y entender las condiciones físicas en una variedad de objetos nebulares, prestando particular atención al...
  • Publicación
    Confirmation of the link between central star binarity and extreme abundance discrepancy factors in planetary nebulae
    It has recently been noted that there seems to be a strong correlation between planetary nebulae with close binary central stars and highly enhanced...