Arzoumanian, D.; André, Ph.; Didelon, P.; Könyves, V.; Schneider, N.; Men’shchikov, A.; Sousbie, T.; Zavagno, A.; Bontemps, S.; Di Francesco, J.; Griffin, M.; Hennemann, M.; Hill, T.; Kirk, J.; Martin, P.; Minier, V.; Molinari, S.; Motte, F.; Peretto, N.; Pezzuto, S.; Spinoglio, L.; Ward-Thompson, D.; White, G. and Wilson, C. D.
(2011).
![[img]](http://oro.open.ac.uk/style/images/fileicons/application_pdf.png)
|
PDF (Version of Record)
- Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (877Kb) |
| DOI (Digital Object Identifier) Link: | http://doi.org/10.1051/0004-6361/201116596 |
|---|---|
| Google Scholar: | Look up in Google Scholar |
Abstract
We provide a first look at the results of the Herschel Gould Belt survey toward the IC 5146 molecular cloud and present a preliminary analysis of the filamentary structure in this region. The column density map, derived from our 70–500 μm Herschel data, reveals a complex network of filaments and confirms that these filaments are the main birth sites of prestellar cores. We analyze the column density profiles of 27 filaments and show that the underlying radial density profiles fall off as r-1.5 to r-2.5 at large radii. Our main result is that the filaments seem to be characterized by a narrow distribution of widths with a median value of 0.10 ± 0.03 pc, which is in stark contrast to a much broader distribution of central Jeans lengths. This characteristic width of ~0.1 pc corresponds to within a factor of ~2 to the sonic scale below which interstellar turbulence becomes subsonic in diffuse gas, which supports the argument that the filaments may form as a result of the dissipation of large-scale turbulence.
| Item Type: | Journal Article |
|---|---|
| Copyright Holders: | 2011 ESO |
| ISSN: | 1432-0746 |
| Extra Information: | 9 pp. |
| Keywords: | stellar formation; IC 5146; clouds |
| Academic Unit/Department: | Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences Faculty of Science, Technology, Engineering and Mathematics (STEM) |
| Interdisciplinary Research Centre: | Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR) |
| Item ID: | 31794 |
| Depositing User: | G. J. White |
| Date Deposited: | 20 Jan 2012 14:07 |
| Last Modified: | 02 Aug 2016 17:37 |
| URI: | http://oro.open.ac.uk/id/eprint/31794 |
| Share this page: |     |
Altmetrics | Scopus Citations |
Download history for this item
These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.