Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-31
Astron.Astrophys.408:L25-L28,2003
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures
Scientific paper
10.1051/0004-6361:20031157
We present millimetre-line imaging of the Galactic HII region Sh 104. We show that it is surrounded by a ring of molecular gas and dust. Four large molecular condensations are regularly spaced around the ring. These condensations are themselves fragmented and contain several massive dense cores. A deeply embedded cluster is observed in the near IR towards the largest condensation. It contains at least one massive star ionizing an ultra-compact HII region. The Sh 104 region is a good illustration of the `collect and collapse' model for star formation triggered by the expansion of an HII region.
Caplan James
Deharveng Lise
Lefloch Bertrand
Martín Samuel
Nadeau Daniel
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