Astrophysical: Planetary nebulae

  • Publication
    Diffuse Light in Galaxy Groups
    We have studied the amount of diffuse light in two galaxy groups, Leo and HCG 44 through the detection of intragroup planetary nebulae (IGPNe). The emission...
  • Publication
    Discovery of a planetary nebula surrounding the symbiotic star DT Serpentis
    We report the discovery of a planetary nebula centered on the poorly studied symbiotic binary star DT Ser. In a few other symbiotic stars spatially resolved...
  • Publication
    Discovery of an eclipsing dwarf nova in the ancient nova shell Te 11
    We report on the discovery of an eclipsing dwarf nova (DN) inside the peculiar, bilobed nebula Te 11. Modelling of high-speed photometry of the eclipse finds...
  • Publication
    Discovery of close binary central stars in the planetary nebulae NGC 6326 and NGC 6778
    We present observations proving the close binary nature of the central stars belonging to the planetary nebulae (PNe) NGC 6326 and NGC 6778. Photometric...
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    Dissecting NGC 3132: tracing the mass-loss history of the southern ring planetary nebula
    Central to our understanding of stellar evolution and its impact on processes in our Galaxy and across the Universe is the study of mass-loss. While the general...
  • Publication
    Distance determination to PNe using the extinction-distance method
    We present individual distances to three PNe: NGC 6537, NGC 6781 and NGC 7027, determined by the extinction-distance method. These objects are part of a larger...
  • Publication
    Do the Various Types of PNe Knots Differ in Terms of their Physical Properties? The case of NGC662
    Years ago we have compiled all the available optical data in the literature to build a comprehensive classification of the low-ionization structures (LIS), as...
  • Publication
    Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy
    We present the results of a systematic analysis of the solid state features identified in the circumstellar environments of a large sample of evolved stars with...
  • Publication
    Dust scattering and kinematics within the envelope of IRAS 09371+1212.
    We have acquired narrow and broad band imaging, together with high and low resolution spectroscopy for the source IRAS 09371+1212. As a result, we are able to...