Multi-line (sub)millimetre observations of the high-mass proto cluster IRAS 05358+3543

Details Multi-line (sub)millimetre observations of the high-mass proto cluster IRAS 05358+3543 Multi-line (sub)millimetre observations of the high-mass proto cluster IRAS 05358+3543

2007-10-23

arxiv.org/abs/0710.4238v1

Astronomy and Astrophysics

Astrophysics

16 pages, 10 figures, accepted by A&A

Scientific paper

10.1051/0004-6361:20077977

Since most high- and intermediate-mass protostars are at great distance and form in clusters, high linear resolution observations are needed to investigate their physical properties. To study the gas in the innermost region around the protostars in the proto-cluster IRAS 05358+3543, we observed the source in several transitions of methanol and other molecular species with the Plateau de Bure Interferometer and the Submillimeter Array, reaching a linear resolution of 1100 AU. We determine the kinetic temperature of the gas around the protostars through an LVG and LTE analysis of their molecular emission; the column densities of CH3OH, CH3CN and SO2 are also derived. Constrains on the density of the gas are estimated for two of the protostellar cores. We find that the dust condensations are in various evolutionary stages. The powerhouse of the cluster, mm1a, harbours a hot core with T~220 (75

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