Astrophysical: Planetary nebulae

  • Publication
    The Nature of Dust in Compact Galactic Planetary Nebulae from Spitzer Spectra
    We present the Spitzer/Infrared Spectrograph (IRS) spectra of 157 compact Galactic planetary nebulae (PNe). These young PNe provide insight on the effects of...
  • Publication
    The Nature of Low-Ionization Microstructures in PNe
    We discuss here the nature of a rich zoo of knots, filaments, jets and jet-like systems, located--in terms of morphology and kinematics--either inside or...
  • Publication
    The Necklace planetary nebula: equatorial and polar outflows from a post-common-envelope system
    We present the discovery of a new planetary nebula from the IPHAS survey. The remarkable morphology of its inner regions, which display a bright knotty ring...
  • Publication
    The Necklace: equatorial and polar outflows from the binary central star of the new planetary nebula IPHASX J194359.5+170901
    IPHASX J194359.5+170901 is a new high-excitation planetary nebula with remarkable characteristics. It consists of a knotty ring expanding at a speed of 28 km s...
  • Publication
    The Onset of Photoionization in Post-AGB Stars
    During the post-AGB phase the dust shell detaches from the central star and dust temperatures varies between 100 and 200 K. In order to study the onset of photo...
  • Publication
    The origin of the most luminous Planetary Nebulae
    As part of a systematic effort to characterize the properties and progenitors of the most luminous planetary nebulae (PNe), we obtained a sample among the...
  • Publication
    The origin of the planetary nebula M 1-16. A morpho-kinematic and chemical analysis
    We investigated the origin of the Planetary Nebula (PN) M 1-16 using narrow-band optical imaging, and high- and low-resolution optical spectra to perform a...
  • Publication
    The Origins of Planetary Nebulae in the Inner and Outer Disks of M 31
    The planetary nebulae (PNe) of M 31 are receiving considerable attention as probes of its structure and chemical evolution in a galactic environment that is...
  • Publication
    The outflow structure of NGC 6537.
    We present high and low resolution spectroscopy and narrow-band imaging of the unusual bipolar outflow source NGC 6537. As a consequence, we are able for the...