5 papers
A submillimeter line survey of low-mass protostars: prelude to ALMA and Herschel
E. F. van Dishoeck, J. K. Joergensen, S. Maret +5
The results from a single-dish molecular line survey of a set of 18 deeply embedded young stellar objects are summarized. More than 40 lines from 16 different species were observed…
Does IRAS 16293-2422 contain a hot core? New interferometric results
F. L. Schoeier, J. K. Jorgensen, E. F. van Dishoeck +1
High angular resolution H2CO line observations have been carried out for the low mass proto-binary star IRAS 16293-2422 using the OVRO millimeter array. Simultaneous continuum obse…
Molecular abundances in low-mass protostellar envelopes
Jes K. Jorgensen, Fredrik L. Schoeier, Ewine F. van Dishoeck
A study of the chemical structure of the envelopes around a sample protostars is introduced. Physical models for the envelopes derived using 1D radiative transfer modeling of their…
A database of molecular line data for rotational transitions from selected species of astrophysical interest
F. L. Schoeier, F. F. S. van der Tak, E. F. van Dishoeck +1
Molecular line data for the rotational transitions of a number of astrophysically interesting species have been collected and are made publically available through the www. These d…
The 12C/13C-ratio in cool carbon stars
F. L. Schoeier, H. Olofsson
We present observations of circumstellar millimetre-wave 13CO line emission towards a sample of 20 cool carbon stars. Using a detailed radiative transfer model we estimate the circ…