Téléchargement | - Voir la version finale : The JCMT Gould Belt Survey: a first look at IC 5146 (PDF, 3.2 Mio)
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DOI | Trouver le DOI : https://doi.org/10.3847/1538-4357/aa5b95 |
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Auteur | Rechercher : Johnstone, D.1; Rechercher : Ciccone, S.1; Rechercher : Kirk, H.1; Rechercher : Mairs, S.1; Rechercher : Buckle, J.; Rechercher : Berry, D. S.; Rechercher : Broekhoven-Fiene, H.1; Rechercher : Currie, M. J.; Rechercher : Hatchell, J.; Rechercher : Jenness, T.; Rechercher : Mottram, J. C.; Rechercher : Pattle, K.; Rechercher : Tisi, S.; Rechercher : Di Francesco, J.1; Rechercher : Hogerheijde, M. R.; Rechercher : Ward-Thompson, D.; Rechercher : Bastien, P.; Rechercher : Bresnahan, D.; Rechercher : Butner, H.; Rechercher : Chen, M.1; Rechercher : Chrysostomou, A.; Rechercher : Coudé, S.; Rechercher : Davis, C. J.; Rechercher : Drabek-Maunder, E.; Rechercher : Duarte-Cabral, A.; Rechercher : Fich, M.; Rechercher : Fiege, J.; Rechercher : Friberg, P.; Rechercher : Friesen, R.; Rechercher : Fuller, G. A.; Rechercher : Graves, S.; Rechercher : Greaves, J.; Rechercher : Gregson, J.; Rechercher : Holland, W.; Rechercher : Joncas, G.; Rechercher : Kirk, J. M.; Rechercher : Knee, L. B. G.1; Rechercher : Marsh, K.; Rechercher : Matthews, B. C.1; Rechercher : Moriarty-Schieven, G.1; Rechercher : Mowat, C.; Rechercher : Nutter, D.; Rechercher : Pineda, J. E.; Rechercher : Salji, C.; Rechercher : Rawlings, J.; Rechercher : Richer, J.; Rechercher : Robertson, D.; Rechercher : Rosolowsky, E.; Rechercher : Rumble, D.; Rechercher : Sadavoy, S.; Rechercher : Thomas, H.; Rechercher : Tothill, N.; Rechercher : Viti, S.; Rechercher : White, G. J.; Rechercher : Wouterloot, J.; Rechercher : Yates, J.; Rechercher : Zhu, M. |
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Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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Format | Texte, Article |
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Sujet | ISM: clouds; ISM: structure; stars: formation; stars: protostars; submillimeter: galaxies; submillimeter: ISM |
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Résumé | 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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Date de publication | 2017-02-10 |
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Maison d’édition | American Astronomical Society |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro NPARC | 23002196 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 585b478a-bff8-4189-9e53-137156dcecbf |
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Enregistrement créé | 2017-09-01 |
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Enregistrement modifié | 2020-05-30 |
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