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From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt Survey
Andre, Ph.1; Men'shchikov, A.1; Bontemps, S.1; Koenyves, V.1; Motte, F.1; Schneider, N.1; Didelon, P.1; Minier, V.1; Saraceno, P.5; Ward-Thompson, D.3; Di Francesco, J.10; White, G.18,21; Molinari, S.5; Testi, L.17; Abergel, A.2,20; Griffin, M.3; Henning, Th.11; Royer, P.7; Merin, B.13; Vavrek, R.13; Attard, M.1; Arzoumanian, D.1; Wilson, C. D.19; Ade, P.3; Aussel, H.1; Baluteau, J. -P.4; Benedettini, M.5; Bernard, J. -Ph.6; Blommaert, J. A. D. L.7; Cambresy, L.8; Cox, P.9; Di Giorgio, A.5; Hargrave, P.3; Hennemann, M.1; Huang, M.12; Kirk, J.3; Krause, O.11; Launhardt, R.11; Leeks, S.18; Le Pennec, J.1; Li, J. Z.12; Martin, P. G.14; Maury, A.1; Olofsson, G.15; Omont, A.16; Peretto, N.1; Pezzuto, S.5; Prusti, T.22; Roussel, H.16; Russeil, D.4; Sauvage, M.1; Sibthorpe, B.20; Sicilia-Aguilar, A.11; Spinoglio, L.5; Waelkens, C.7; Woodcraft, A.20; Zavagno, A.4
摘要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 mu m 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 similar to 350 and 500 prestellar cores and similar to 45-60 Class 0 protostars can be identified in the Aquila field, while similar to 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.
关键词Stars: Formation Circumstellar Matter Ism: Clouds Ism: Structure Submillimeter: Ism
被引频次:647[WOS]   [WOS记录]     [WOS相关记录]
作者单位1.Univ Paris Diderot, Lab AIM,CEA Saclay, CEA DSM CNRS, IRFU Serv Astrophys, F-91191 Gif Sur Yvette, France
2.Univ Paris 11, CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France
3.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales
4.Univ Aix Marseille 1, CNRS, INSU, Lab Astrophys Marseille, F-13388 Marseille 13, France
5.INAF Ist Fis Spazio Interplanetario, I-00133 Rome, Italy
6.Univ Toulouse, CNRS UPS, CESR, Observ Midi Pyrenees, F-31028 Toulouse 04, France
7.Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium
8.Observ Strasbourg, CDS, F-67000 Strasbourg, France
9.IRAM, F-38406 St Martin Dheres, France
10.Herzberg Inst Astrophys, Natl Res Council Canada, Victoria, BC V9E 2E7, Canada
11.Max Planck Inst Astron, D-69117 Heidelberg, Germany
12.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
13.ESA, ESAC, Herschel Sci Ctr, Madrid 28691, Spain
14.Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada
15.AlbaNova Univ Ctr, Stockholm Observ, S-10691 Stockholm, Sweden
16.Univ Paris 06, Inst Astrophys Paris, F-75014 Paris, France
17.Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy
18.Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England
19.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
20.Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland
21.Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England
22.ESA ESTEC, NL-2200 AG Noordwijk, Netherlands
GB/T 7714
Andre, Ph.,Men'shchikov, A.,Bontemps, S.,et al. From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt Survey[J]. ASTRONOMY & ASTROPHYSICS,2010,518.
APA Andre, Ph..,Men'shchikov, A..,Bontemps, S..,Koenyves, V..,Motte, F..,...&Zavagno, A..(2010).From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt Survey.ASTRONOMY & ASTROPHYSICS,518.
MLA Andre, Ph.,et al."From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt Survey".ASTRONOMY & ASTROPHYSICS 518(2010).
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