Triggered massive-star formation on the borders of Galactic H II regions I. A search for "collect and collapse" candidates

By L. Deharveng, A. Zavagno, J. Caplan. 2004

174 citations recorded by the source corpus.

Young massive stars or clusters are often observed at the peripheries of H  regions. What triggers star formation at such locations? Among the scenarios that have been proposed, the "collect and collapse" process is particularly attractive because it permits the formation of massive objects via the fragmentation of the dense shocked layer of neutral gas surrounding the expanding ionized zone. However, until our recent article on Sh 104, it had not been convincingly demonstrated that this process actually takes place. In the present paper we present our selection of seventeen candidate regions for this process; all show high-luminosity near-IR clusters and/or mid-IR point sources at their peripheries. The reality of a "collect and collapse" origin of these presumably second-generation stars and clusters will be discussed in forthcoming papers, using new near-IR and millimetre observations.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/f1b46cb5bd8ecdea5550ee7991264bcb13c734a0

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In Astronomy and Astrophysics

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ATLASGAL - The APEX telescope large area survey of the galaxy at 870 μm (2009, background): “Another topic that can be addressed with these data is the importance of triggered star formation, which can be assessed by identifying the second generation stars at the edges of Hii regions (e.g., Deharveng et al. 2005) and supernova remnants.”