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Triggered massive-star formation at the border of the HII region Sh 104

Deharveng, L., Lefloch, B., Zavagno, A., Caplan, J., Whitworth, Anthony Peter, Nadeau, D. and Martin, S. 2003. Triggered massive-star formation at the border of the HII region Sh 104. Astronomy and Astrophysics 408 (3) , L25-L28. 10.1051/0004-6361:20031157

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We present millimetre-line imaging of the Galactic H II 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 H II region. The Sh 104 region is a good illustration of the "collect and collapse" model for star formation triggered by the expansion of an H II region.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: stars: formation; stars: early-type; ISM: H II regions; ISM: individual: Sh2-104
Additional Information: Pdf uploaded in accordance with publisher's policy at (accessed 17/04/2014)
Publisher: EDP sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 05:01

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