A high resolution spectrum (Δλ = 0.2 Å) of the Population II star HD 76932 from the archive of the IUE satellite has been analysed in a search for measurable...
PublicationAn upper limit to the abundance of Be-9 in the Population II star HD 76932 from a high resolution spectrum with IUE
PublicationBe-9 abundances in halo dwarfs - Implications for early nucleosynthesis of light elements
PublicationChemical abundances of the WR-ring nebulae NGC 2359 and RCW 78
This paper reports on extensive spectroscopic observations of the WR-ring nebulae NGC 2359 and RCW 78, respectively, excited by the WN5 stars HD 56925 and WN8...
PublicationCosmochemistry. The melting pot of the elements
The chemical composition of the Universe has evolved over billions of years. A host of astrophysical processes and observations must be understood in order to...
PublicationEvolutionary phenomena in galaxies
Topics discussed include the origin and early development of galaxies; gas and global star formation; galactic nuclei; population, age, and dynamics of the...
PublicationJ = 4-3 HCN observations of M17 SW, DR 21/OH/, W51 and NGC 6334
We report observations of NGC 6334N, Ml7 5W, W 51 and DR2l(OH) in the J = 4→3 transition of HCN at 354GHz. These results are combined with previously obtained J...
PublicationLimits on the D:H ratio in the interstellar medium from molecular observations
The abundance ratio of D:H in the interstellar medium can be derived either more directly from the UV absorption measurements of HD and H2 in the spectra of...
PublicationThe chemical composition gradient across M 33
The abundance gradient in M 33 is studied on the basis of IPCS and CCD data on emission lines in selected H II regions, using O II, O III, S II, and S III in...