72 citations · 206 across the 6 of their papers we have counts for
3 papers · 1 filter
Mass-loss properties of S-stars on the AGB
S. Ramstedt, F. L. Schoeier, H. Olofsson +1
We have used a detailed non-LTE radiative transfer code to model new APEX CO(J=3-2) data, and existing CO radio line data, on a sample of 40 AGB S-stars. The derived mass-loss-rate…
Probable detection of H2D+ in the starless core Barnard 68
M. R. Hogerheijde, P. Caselli, M. Emprechtinger +8
The presence of H2D+ in dense cloud cores underlies ion-molecule reactions that strongly enhance the deuterium fractionation of many molecular species. We determine the H2D+ abunda…
SiO in C-rich circumstellar envelopes of AGB stars: effects of non-LTE chemistry and grain adsorption
F. L. Schoeier, H. Olofsson, A. A. Lundgren
New SiO multi-transition millimetre line observations of a sample of carbon stars, including J=8-7 observations with the APEX telescope, are used to probe the role of non-equilibri…