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CharacterizinginterstellarfilamentswithHerschelin IC5146 D. ArzoumanianPh. AndréP. Didelon2011 год

Characterizing interstellar filaments withHerschelin IC 5146
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Аннотация: We provide a first look at the results of the Herschel Gould Belt survey toward the IC5146 molecular cloud and present a preliminary analysis of the filamentary structure in this region. The column density map, derived from our 70-500 micron 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 having 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, supporting the argument that the filaments may form as a result of the dissipation of large-scale turbulence.
Год издания: 2011
Авторы: D. Arzoumanian, Ph. André, P. Didelon, V. Könyves, N. Schneider, A. Men’shchikov, T. Sousbie, A. Zavagno, S. Bontemps, James Di Francesco, M. J. Griffin, M. Hennemann, T. Hill, J. M. Kirk, P. G. Martin, V. Minier, S. Molinari, F. Motte, N. Peretto, S. Pezzuto, L. Spinoglio, D. Ward–Thompson, G. J. White, C. D. Wilson
Издательство: EDP Sciences
Источник: Astronomy and Astrophysics
Ключевые слова: Astrophysics and Star Formation Studies, Stellar, planetary, and galactic studies, Astro and Planetary Science
Другие ссылки: Astronomy and Astrophysics (PDF)
Astronomy and Astrophysics (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
ORCA Online Research @Cardiff (Cardiff University) (HTML)
Open Research Online (The Open University) (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
DataCite API (HTML)