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Triggered massive-star formation at the border of the HII region Sh 104 | | L. Deharveng
; B. Lefloch
; A. Zavagno
; J. Caplan
; A.P. Whitworth
; D. Nadeau
; S. Martin
; | | Date: |
31 Aug 2003 | | Journal: | Astron.Astrophys. 408 (2003) L25-L28 | | Subject: | astro-ph | | Affiliation: | Laboratoire d’Astrophysique de Marseille, Laboratoire d’Astrophysique de l’Observatoire de Grenoble, Department of Physics and Astronomy, University of Wales, Cardiff, Observatoire du Mont Megantic et Departement de Physique, Univ | | Abstract: | 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. | | Source: | arXiv, astro-ph/0309018 | | Services: | Forum | Review | PDF | Favorites | |
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