| Download | - View final version: The JCMT Gould Belt Survey: a first look at IC 5146 (PDF, 3.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.3847/1538-4357/aa5b95 |
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| Author | Search for: Johnstone, D.1; Search for: Ciccone, S.1; Search for: Kirk, H.1; Search for: Mairs, S.1; Search for: Buckle, J.; Search for: Berry, D. S.; Search for: Broekhoven-Fiene, H.1; Search for: Currie, M. J.; Search for: Hatchell, J.; Search for: Jenness, T.; Search for: Mottram, J. C.; Search for: Pattle, K.; Search for: Tisi, S.; Search for: Di Francesco, J.1; Search for: Hogerheijde, M. R.; Search for: Ward-Thompson, D.; Search for: Bastien, P.; Search for: Bresnahan, D.; Search for: Butner, H.; Search for: Chen, M.1; Search for: Chrysostomou, A.; Search for: Coudé, S.; Search for: Davis, C. J.; Search for: Drabek-Maunder, E.; Search for: Duarte-Cabral, A.; Search for: Fich, M.; Search for: Fiege, J.; Search for: Friberg, P.; Search for: Friesen, R.; Search for: Fuller, G. A.; Search for: Graves, S.; Search for: Greaves, J.; Search for: Gregson, J.; Search for: Holland, W.; Search for: Joncas, G.; Search for: Kirk, J. M.; Search for: Knee, L. B. G.1; Search for: Marsh, K.; Search for: Matthews, B. C.1; Search for: Moriarty-Schieven, G.1; Search for: Mowat, C.; Search for: Nutter, D.; Search for: Pineda, J. E.; Search for: Salji, C.; Search for: Rawlings, J.; Search for: Richer, J.; Search for: Robertson, D.; Search for: Rosolowsky, E.; Search for: Rumble, D.; Search for: Sadavoy, S.; Search for: Thomas, H.; Search for: Tothill, N.; Search for: Viti, S.; Search for: White, G. J.; Search for: Wouterloot, J.; Search for: Yates, J.; Search for: Zhu, M. |
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| Affiliation | - National Research Council of Canada. Herzberg Astronomy and Astrophysics
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| Format | Text, Article |
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| Subject | ISM: clouds; ISM: structure; stars: formation; stars: protostars; submillimeter: galaxies; submillimeter: ISM |
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| Abstract | We present 450 and 850 mum submillimeter continuum observations of the IC 5146 star-forming region taken as part of the James Clerk Maxwell Telescope Gould Belt Survey. We investigate the location of bright submillimeter (clumped) emission with the larger-scale molecular cloud through comparison with extinction maps, and find that these denser structures correlate with higher cloud column density. Ninety-six individual submillimeter clumps are identified using FellWalker, and their physical properties are examined. These clumps are found to be relatively massive, ranging from 0.5 M⊙ to 116 M⊙ with a mean mass of 8 M⊙ and a median mass of 3.7 M⊙. A stability analysis for the clumps suggests that the majority are (thermally) Jeans stable, with M/Mⱼ<1. We further compare the locations of known protostars with the observed submillimeter emission, finding that younger protostars, i.e., Class 0 and I sources, are strongly correlated with submillimeter peaks and that the clumps with protostars are among the most Jeans unstable. Finally, we contrast the evolutionary conditions in the two major star-forming regions within IC 5146: the young cluster associated with the Cocoon Nebula and the more distributed star formation associated with the Northern Streamer filaments. The Cocoon Nebula appears to have converted a higher fraction of its mass into dense clumps and protostars, the clumps are more likely to be Jeans unstable, and a larger fraction of these remaining clumps contain embedded protostars. The Northern Streamer, however, has a larger number of clumps in total and a larger fraction of the known protostars are still embedded within these clumps. |
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| Publication date | 2017-02-10 |
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| Publisher | American Astronomical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23002196 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 585b478a-bff8-4189-9e53-137156dcecbf |
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| Record created | 2017-09-01 |
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| Record modified | 2020-05-30 |
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