Astrophysical: Planetary nebulae

  • Publication
    Unveiling low-ionization microstructures in planetary nebulae.
    (Hα+[NII])/[OIII] ratio images have been used to search for low-ionization small-scale structures in a sample of 258 planetary nebulae. Radially symmetrical...
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    Unveiling shocks in planetary nebulae
    The propagation of a shock wave into a medium is expected to heat the material beyond the shock, producing noticeable effects in intensity line ratios such as...
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    Unveiling the structure of the planetary nebula M 2-48:. Kinematics and physical conditions
    The kinematics and physical conditions of the bipolar planetary nebula M 2-48 are analysed from high and low dispersion long-slit spectra. Previous CCD narrow...
  • Publication
    Unveiling the Structure of the Planetary Nebula M2-48
    The PN M2-48 is formed by three main structures, namely, a bipolar central region (CR), a set of knots tracing a semicircular shell surrounding CR, and two...
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    Variable central stars of young planetary nebulae. I. Photometric multisite observations of IC 418.
    We report the results of a photometric multisite campaign devoted to HD 35914, the variable central star of the Planetary Nebula IC 418. From the analysis of...
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    Very Large Telescope Echelle Spectrophotometry of the Planetary Nebula NGC 5307 and Temperature Variations
    Echelle spectrophotometry of the planetary nebula NGC 5307 is presented. The data consist of Very Large Telescope Ultraviolet Visual Echelle Spectrograph...
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    VLT/FORS1 spectrophotometry of the first planetary nebula discovered in the Phoenix dwarf galaxy
    Context: A planetary nebula (PN) candidate was discovered during FORS imaging of the Local Group dwarf galaxy Phoenix. Aims: We use this PN to complement...
  • Publication
    Watching PrePNe Evolve: 15 Years of HST Observations
    Multi-epoch HST images have been obtained for the pre planetary nebulae CRL618, CRL2688, and Hen3-1475. Each object shows clear and idiosyncratic expansion...
  • Publication
    When nature tries to trick us. An eclipsing eccentric close binary superposed on the central star of the planetary nebula M 3-2
    Bipolar planetary nebulae (PNe) are thought to result from binary star interactions and, indeed, tens of binary central stars of PNe have been found, in...