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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 559049.0, MPI für Astronomie / Publikationen_mpia
From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt Survey
Authors:André, Ph.; Men'shchikov, A.; Bontemps, S.; Könyves, V.; Motte, F.; Schneider, N.; Didelon, P.; Minier, V.; Saraceno, P.; Ward-Thompson, D.; di Francesco, J.; White, G.; Molinari, S.; Testi, L.; Abergel, A.; Griffin, M.; Henning, Th; Royer, P.; Merín, B.; Vavrek, R.; Attard, M.; Arzoumanian, D.; Wilson, C. D.; Ade, P.; Aussel, H.; Baluteau, J. P.; Benedettini, M.; Bernard, J. Ph; Blommaert, J. A. D. L.; Cambrésy, L.; Cox, P.; di Giorgio, A.; Hargrave, P.; Hennemann, M.; Huang, M.; Kirk, J.; Krause, O.; Launhardt, R.; Leeks, S.; Le Pennec, J.; Li, J. Z.; Martin, P. G.; Maury, A.; Olofsson, G.; Omont, A.; Peretto, N.; Pezzuto, S.; Prusti, T.; Roussel, H.; Russeil, D.; Sauvage, M.; Sibthorpe, B.; Sicilia-Aguilar, A.; Spinoglio, L.; Waelkens, C.; Woodcraft, A.; Zavagno, A.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Astronomy and Astrophysics
Journal Abbrev.:Astronomy and Astrophysics
Volume:518
Start Page:id.L102
Review Status:not specified
Audience:Experts Only
Abstract / Description:We summarize the first results from the Gould Belt Survey, obtained toward the Aquila rift and Polaris Flare regions during the science demonstration phase of Herschel. Our 70-500 μm images taken in parallel mode with the SPIRE and PACS cameras reveal a wealth of filamentary structure, as well as numerous dense cores embedded in the filaments. Between ~350 and 500 prestellar cores and ~45-60 Class 0 protostars can be identified in the Aquila field, while ~300 unbound starless cores and no protostars are observed in the Polaris field. The prestellar core mass function (CMF) derived for the Aquila region bears a strong resemblance to the stellar initial mass function (IMF), already confirming the close connection between the CMF and the IMF with much better statistics than earlier studies. Comparing and contrasting our Herschel results in Aquila and Polaris, we propose an observationally-driven scenario for core formation according to which complex networks of long, thin filaments form first within molecular clouds, and then the densest filaments fragment into a number of prestellar cores via gravitational instability. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Appendix A and Figures 3, 4 are only available in electronic form at <A href="http://www.aanda.org">http://www.aanda.org</A>
Free Keywords:stars: formation; circumstellar matter; ISM: clouds; ISM: structure; submillimeter: ISM
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010A%26A...518L.102... [ID No:1]
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