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Filamentary structures and compact objects in the Aquila and Polaris clouds observed by Herschel

Men'shchikov, A.; André, Ph.; Didelon, P.; Könyves, V.; Schneider, N.; Motte, F.; Bontemps, S.; Arzoumanian, D.; Attard, M.; Abergel, A.; Baluteau, J.-P.; Bernard, J.-Ph.; Cambrésy, L.; Cox, P.; Di Francesco, J.; di Giorgio, A. M.; Griffin, M.; Hargrave, P.; Huang, M.; Kirk, J.; Li, J. Z.; Martin, P.; Minier, V.; Miville-Deschênes, M.-A.; Molinari, S.; Olofsson, G.; Pezzuto, S.; Roussel, H.; Russeil, D.; Saraceno, P.; Sauvage, M.; Sibthorpe, B.; Spinoglio, L.; Testi, L.; Ward-Thompson, D.; White, G.; Wilson, C. D.; Woodcraft, A. and Zavagno, A. (2010). Filamentary structures and compact objects in the Aquila and Polaris clouds observed by Herschel. Astronomy & Astrophysics, 518, article no. L103.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1051/0004-6361/201014668
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Abstract

Our PACS and SPIRE images of the Aquila Rift and part of the Polaris Flare regions, taken during the science demonstration phase of Herschel discovered fascinating, omnipresent filamentary structures that appear to be physically related to compact cores. We briefly describe a new multiscale, multi-wavelength source extraction method used to detect objects and measure their parameters in our Herschel images. All of the extracted starless cores (541 in Aquila and 302 in Polaris) appear to form in the long and very narrow filaments.With its combination of the far-IR resolution and sensitivity, Herschel directly reveals the filaments in which the dense cores are embedded; the filaments are resolved and have deconvolved widths of ~35" in Aquila and ~59" in Polaris (~9000 AU in both regions). Our first results of observations with Herschel enable us to suggest that in general dense cores may originate in a process of fragmentation of complex networks of long, thin filaments, likely formed as a result of an interplay between gravity, interstellar turbulence, and magnetic fields. To unravel the roles of the processes, one has to obtain additional kinematic and polarization information; these follow-up observations are planned.

Item Type: Journal Article
Copyright Holders: 2010 ESO
ISSN: 1432-0746
Extra Information: 7 pp.
Keywords: star formation; circumstellar matter; clouds; infrared; submillimeter
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 25154
Depositing User: Ann McAloon
Date Deposited: 07 Dec 2010 10:57
Last Modified: 04 Aug 2014 19:28
URI: http://oro.open.ac.uk/id/eprint/25154
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