Astrophysical: Planetary nebulae

  • Publication
    Abundance variations in the planetary nebula A 78
    The authors present long slit low dispersion flux calibrated spectra for the planetary nebula A 78, and from these they obtain the chemical abundances and their...
  • Publication
    Abundances and ADFs in planetary nebulae with [WC] central stars
    We present preliminary results obtained from the analysis of very deep echelle spectra of a dozen planetary nebulae with [WC] or weak emission lines (wels)...
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    Accurate positions of candidate planetary nebulae in M 33
    We present new determinations of the positions of the planetary nebulae candidates found in Messier 33 by Magrini et al. (2000). The new coordinates have an...
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    ALMA high spatial resolution observations of the dense molecular region of NGC 6302
    Context. The mechanism behind the shaping of bipolar planetary nebulae is still poorly understood. It is becoming increasingly clear that the main agents must...
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    An atlas of images of Planetary Nebulae
    A catalogue of narrowband CCD images of 100 southern and 1 northern Planetary Nebulae is presented. The data are images taken in the light of the Hα , Hβ ,...
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    An imaging spectroscopic survey of the planetary nebula NGC 7009 with MUSE★
    Aims: The spatial structure of the emission lines and continuum over the 50″ extent of the nearby, O-rich, PN NGC 7009 (Saturn Nebula) have been observed with...
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    Analysis of chemical abundances in planetary nebulae with [WC] central stars. I. Line intensities and physical conditions
    Context. Planetary nebulae (PNe) around Wolf-Rayet [WR] central stars ([WR]PNe) constitute a particular photoionized nebula class that represents about 10% of...
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    Analysis of chemical abundances in planetary nebulae with [WC] central stars. II. Chemical abundances and the abundance discrepancy factor
    Aims: We present the abundance analysis of 12 planetary nebulae ionized by [WC]-type stars and weak-emission-line stars (wels) obtained from high-resolution...
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    Analysis of Co-spatial UV-optical HST/STIS Spectra of Planetary Nebula NGC 3242
    This project sought to consider two important aspects of the planetary nebula NGC 3242 using new long-slit HST/STIS spectra. First, we investigated whether this...