Astrofísicas: Nebulosas planetarias

  • Publicación
    New planetary nebulae with ISM interaction discovered with IPHAS
    The low surface brightness usually associated with nebulae mixing with the ISM has long been a substantial obstacle in the observation and statistical study of...
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    New young planetary nebulae in IPHAS
    Aims: We search for very small-diameter galactic planetary nebulae (PNe) representing the earliest phases of PN evolution. The IPHAS catalogue of Hα-emitting...
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    NGC 6778: strengthening the link between extreme abundance discrepancy factors and central star binarity in planetary nebulae
    We present new optical spectra of the nearby, bright, planetary nebula NGC 6778. The nebula has been known to emit strong recombination lines for more than 40...
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    NLTE analysis of high-resolution spectra of CSPN
    Preliminary results of new high-resolution and S/N ratio spectra of central stars of planetary nebulae (CSPN) are presented. The atmospheric parameters (Teff...
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    Non-detection of Magnetic Fields in the Central Stars of the Planetary Nebulae NGC 1360 and LSS 1362
    The presence of magnetic fields is an attractive hypothesis for shaping planetary nebulae (PNe). We report on observations of the central star of the two PNe...
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    Non-detection of the 1.67 micron band in HB 5? Implications for PAH-related models
    In this paper we present a high resolution IR spectrum of the planetary nebula Hb5, over the range 1.6-1.75 micron. Our aim is to test the hypothesis invoking...
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    Observational Confirmation of a Link Between Common Envelope Binary Interaction and Planetary Nebula Shaping
    A current issue in the study of planetary nebulae with close binary central stars (CSs) is the extent to which the binaries affect the shaping of the nebulae...
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    On central star luminosities and optical thicknesses in planetary nebulae
    Results of an investigation of 23 planetary nebulae whose post-AGB central stars have been previously analyzed using direct spectroscopic non-LTE methods are...
  • Publicación
    On the Chemical Abundances of Multiple-Shell Planetary Nebulae with Halos
    We present narrowband imagery and long-slit intermediate-resolution spectroscopy of the multiple-shell planetary nebulae NGC 2438 and NGC 5882. A comparative...