15 citations · 15 across the 1 of their papers we have counts for
4 papers
An abundance analysis from the STIS-HST UV spectrum of the non-magnetic Bp star HR 6000
F. Castelli, C. R. Cowley, T. R. Ayres +2
The sharp-line spectrum of the Bp star HR 6000 has peculiarities that distinguish it from those of the HgMn stars with which it is sometimes associated. The position of the star cl…
A study of the elements copper through uranium in Sirius A: Contributions from STIS and ground-based spectra
Charles R. Cowley, Thomas R. Ayres, Fiorella Castelli +3
We determine abundances or upper limits for all of the 55 stable elements from copper to uranium for the A1 Vm star Sirius. The purpose of the study is to assemble the most complet…
Stratification and Isotope Separation in CP Stars
C. R. Cowley, S. Hubrig, F. G. Gonzalez
We investigate the elemental and isotopic stratification in the atmospheres of selected chemically peculiar (CP) stars of the upper main sequence. Reconfiguration of the UVES spect…
Magnetic fields in Herbig Ae stars
S. Hubrig, M. Schoeller, R. V. Yudin
Herbig Ae stars are young A-type stars in the pre-main sequence evolutionary phase with masses of ~1.5-3 M_o. They show rather intense surface activity (Dunkin et al. 1997) and inf…