Journal: Astronomy and Astrophysics

  • Publication
    The chemical composition of the Orion star forming region. II. Stars, gas, and dust: the abundance discrepancy conundrum
    Aims: We re-examine the recombination/collisional emission line (RL/CEL) nebular abundance discrepancy problem in the light of recent high-quality abundance...
  • Publication
    The chemical composition of the Orion star forming region. III. C, N, Ne, Mg, and Fe abundances in B-type stars revisited
    Context. Early B-type stars are invaluable indicators of elemental abundances of their birth environments. In contrast to the surrounding neutral interstellar...
  • Publication
    The chemical composition of TS 01, the most oxygen-deficient planetary nebula. AGB nucleosynthesis in a metal-poor binary star
    The planetary nebula TS 01 (also called PN G 135.9+55.9 or SBS 1150+599A) with its record-holding low oxygen abundance and its double degenerate close binary...
  • Publication
    The chemical enrichment by massive stars in Wolf-Rayet galaxies.
    We present stellar population models for starbursts in a sample of eleven Wolf-Rayet galaxies. Taking into account the observational data available, we try to...
  • Publication
    The chemical evolution of the dwarf spheroidal galaxy Sextans
    We present our analysis of the FLAMES dataset targeting the central 25' region of the Sextans dwarf spheroidal galaxy (dSph). This dataset is the third major...
  • Publication
    The chemical structure of bipolar planetary nebulae. I. IC 4406.
    Long slit spectrophotometry of the bipolar planetary nebula IC 4406, in the range from 360 to 930nm, has been used to study the chemical structure along its...
  • Publication
    The chemical structure of bipolar planetary nebulae. II. 13 objects
    Long slit spectrophotometry of 13 bipolar planetary nebulae has been used to study their physical and chemical properties. In each nebula, one to seven...
  • Publication
    The chemistry of planetary nebulae and HII regions in the dwarf galaxies Sextans A and B from deep VLT spectra
    Spectroscopic observations obtained with the VLT of one planetary nebula (PN) in Sextans A and of five PNe in Sextans A and of several H ii regions in these two...
  • Publication
    The chromospheric component of coronal bright points. Coronal and chromospheric responses to magnetic-flux emergence
    Context. We investigate the chromospheric counterpart of small-scale coronal loops constituting a coronal bright point (CBP) and its response to a photospheric...