Astrofísicas: Nebulosas planetarias

  • Publicación
    Analysis of integral field spectroscopy observations of the planetary nebula Hen 2-108 and its central star
    The study of planetary nebulae provides important constraints for many aspects of stellar and Galactic evolution. Hen 2-108 is a poorly known planetary nebula...
  • Charla
    Are magnetic fields shaping PNe?
    This question is important because a large fraction of planetary nebulae (about 80%) are bipolar or elliptical rather than spherically symmetric. Modern...
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    Are Temperature Fluctuations Out There?
    The effect of temperature fluctuations in the spectra of ionized nebulae was firstly explored by Peimbert (1967). Since then, the problem of their existence has...
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    Automatic spectral classification of stellar spectra with low signal-to-noise ratio using artificial neural networks
    Context. As part of a project aimed at deriving extinction-distances for thirty-five planetary nebulae, spectra of a few thousand stars were analyzed to...
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    Automatic stellar spectral classification (Navarro+, 2012)
    More than 2000 stars distributed in the field of view of 35 planetary nebulae, and 31 stars from the spectral catalog of Jacoby et al. (1984, Cat. III/92) were...
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    Binarity and the Abundance Discrepancy Problem in Planetary Nebulae
    The discrepancy between abundances computed using optical recombination lines and collisionally excited lines is a major unresolved problem in nebular...
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    Binary Central Stars of Planetary Nebulae Discovered Through Photometric Variability. III. The Central Star of Abell 65
    A growing number of close binary stars are being discovered among central stars of planetary nebulae. Recent and ongoing surveys are finding new systems and...
  • Publicación
    Binary central stars of planetary nebulae identified with Kepler/K2
    We present the identification of 34 likely binary central stars (CSs) of planetary nebulae (PNe) from Kepler/K2 data, seven of which show eclipses. Of these, 29...
  • Charla
    Binary stars as the key to understand planetary nebulae
    Binarity and mass transfer appear to play a key role in the shaping and, most likely, in the formation of planetary nebulae (PNe), thereby explaining the large...