Publication type: Refereed

  • Publication
    The Chemical Composition of Cernis 52 (BD+31° 640)
    We present an abundance analysis of the star Cernis 52 in whose spectrum we recently reported the naphthalene cation in absorption at 6707.4 Å. This star is on...
  • Publication
    The chemical composition of Galactic ring nebulae around massive stars
    We present deep spectra of ring nebulae associated with Wolf-Rayet (WR) and O-type stars: NGC 6888, G2.4+1.4, RCW 58, S 308, NGC 7635 and RCW 52. The data have...
  • Publication
    The chemical composition of HII regions in the outer Galaxy
    New spectroscopic observations, including the optical and near-infrared ranges, have been obtained for a sample of HII regions located towards the Galactic...
  • Publication
    The chemical composition of the Galactic H II regions M8 and M17. A revision based on deep VLT echelle spectrophotometry
    We present new echelle spectrophotometry of the Galactic H II regions M8 and M17. The data have been taken with the VLT UVES echelle spectrograph in the 3100 to...
  • Publication
    The chemical composition of the Orion star forming region. I. Homogeneity of O and Si abundances in B-type stars
    Context. Recent accurate abundance analyses of B-type main sequence stars in the solar vicinity has shown that abundances derived from these stellar objects are...
  • 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 the post-asymptotic giant branch F supergiant CRL 2688
    We present an analysis of a high-resolution (R ˜ 50 000) optical spectrum of the central region of the protoplanetary nebula CRL 2688. This object is thought to...
  • 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...