Triggered massive-star formation at the border of the hii region sh 104
Sep, 2003
4 pages
Published in:
- Astron.Astrophys. 408 (2003) L25-L28
e-Print:
- astro-ph/0309018 [astro-ph]
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Abstract: (arXiv)
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.- STARS EARLY-TYPE
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