Astrophysical: Planetary nebulae

  • Publication
    Infrared Space Observatory Observations of IRAS 16594-4656: A New Proto-Planetary Nebula with a Strong 21 Micron Dust Feature
    Based on ISO short-wavelength spectrograph (SWS)+long-wavelength spectrograph (LWS) observations, IRAS 16594-4656 is identified as a new member of the rare...
  • Publication
    Infrared Study of Fullerene Planetary Nebulae
    We present a study of 16 planetary nebulae (PNe) where fullerenes have been detected in their Spitzer Space Telescope spectra. This large sample of objects...
  • Publication
    Internal Proper Motions in the Eskimo Nebula
    We present measurements of internal proper motions at more than 500 positions of NGC 2392, the Eskimo Nebula, based on images acquired with WFPC2 on board the...
  • Publication
    Internal Proper-Motions in the Eskimo Nebula
    We present internal proper motion measurements of more than five hundred positions of NGC 2392, based on images acquired with the WFPC2 on bord of the Hubble...
  • Publication
    Intracluster light in the Virgo cluster: large scale distribution
    Aims: The intracluster light (ICL) is a faint diffuse stellar component of clusters made of stars that are not bound to individual galaxies. We have carried out...
  • Publication
    Intracluster Planetary Nebulae in Virgo: Photometric Selection, Spectroscopic Validation, and Cluster Depth
    We have imaged an empty area of 34×34 arcmin2 1.5d north of the Virgo Cluster core to survey for intracluster planetary nebula (PN) candidates. We have...
  • Publication
    Intracluster Stars in the Virgo Cluster Core
    We have investigated the properties of the diffuse light in the Virgo Cluster core region, based on the detection of intracluster planetary nebulae (PNs) in...
  • Publication
    Intracluster Stellar Population Properties from N-Body Cosmological Simulations. I. Constraints at z = 0
    We use a high-resolution collisionless simulation of a Virgo-like cluster in a ΛCDM cosmology to determine the velocity and clustering properties of the diffuse...
  • Publication
    Ionization correction factors for sodium, potassium, and calcium in planetary nebulae
    We use a large grid of photoionization models that are representative of observed planetary nebulae (PNe) to derive ionization correction factors (ICFs) for...