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

被引：205

作者：

Men'shchikov, A. ^{[1
]}

Andre, Ph. ^{[1
]}

Didelon, P. ^{[1
]}

Koenyves, V. ^{[1
]}

Schneider, N. ^{[1
]}

Motte, F. ^{[1
]}

Bontemps, S. ^{[1
]}

Arzoumanian, D. ^{[1
]}

Attard, M. ^{[1
]}

Abergel, A. ^{[2
]}

Baluteau, J. -P. ^{[3
]}

Bernard, J. -Ph. ^{[5
]}

Cambresy, L. ^{[6
]}

Cox, P. ^{[7
]}

Di Francesco, J. ^{[8
]}

Di Giorgio, A. M. ^{[9
]}

Griffin, M. ^{[4
]}

Hargrave, P. ^{[4
]}

Huang, M. ^{[10
]}

Kirk, J. ^{[4
]}

Li, J. Z. ^{[10
]}

Martin, P. ^{[11
]}

Minier, V. ^{[1
]}

Miville-Deschenes, M. -A. ^{[2
,11
]}

Molinari, S. ^{[9
]}

Olofsson, G. ^{[12
]}

Pezzuto, S. ^{[9
]}

Roussel, H. ^{[13
]}

Russeil, D. ^{[4
]}

Saraceno, P. ^{[9
]}

Sauvage, M. ^{[1
]}

Sibthorpe, B. ^{[14
]}

Spinoglio, L. ^{[9
]}

Testi, L. ^{[15
]}

Ward-Thompson, D. ^{[4
]}

White, G. ^{[16
,17
]}

Wilson, C. D. ^{[18
]}

Woodcraft, A. ^{[14
]}

Zavagno, A. ^{[4
]}

机构：

[1] Univ Paris Diderot, CEA DSM CNRS, Lab AIM, IRFU Serv Astrophys,CE Saclay, F-91191 Gif Sur Yvette, France

[2] Univ Paris 11, CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France

[3] Univ Aix Marseille 1, CNRS INSU, Lab Astrophys Marseille, F-13388 Marseille 13, France

[4] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[5] CESR, F-31029 Toulouse, France

[6] Observ Strasbourg, CDS, F-67000 Strasbourg, France

[7] IRAM, F-38406 St Martin Dheres, France

[8] Univ Victoria, Dept Phys & Astron, Herzberg Inst Astrophys, Victoria, BC, Canada

[9] INAF IFSI, I-00133 Rome, Italy

[10] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[11] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada

[12] Stockholm Univ, Dept Astron, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden

[13] Univ Paris 06, UMR7095, CNRS, Inst Astrophys Paris, F-75014 Paris, France

[14] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland

[15] Ist Natl Astrofis, I-50125 Florence, Italy

[16] Rutherford Appleton Lab, Didcot OX11 0NL, Oxon, England

[17] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England

[18] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

来源：

ASTRONOMY & ASTROPHYSICS | 2010年 / 518卷

关键词：

stars: formation; circumstellar matter; ISM: clouds; ISM: structure; infrared: ISM; submillimeter: ISM; MOLECULAR CLOUDS; STAR-FORMATION; EXTINCTION; ORIGIN; FIELDS; ORION; GAS;

D O I：

10.1051/0004-6361/201014668

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 multi-scale, 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 similar to 35 '' in Aquila and similar to 59 '' in Polaris (similar to 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.

引用

页数：7

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