HAL: hal-00523057, version 1

arXiv: 1005.3115

ADS Bibliographic id: 2010A&A...518L.103M

DOI: 10.1051/0004-6361/201014668

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Astronomy and Astrophysics 518 (2010) L103

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

A. Men'shchikov 1, Ph. André 1, P. Didelon 1, V. Könyves, N. Schneider 1, F. Motte 2, 3, S. Bontemps 4, 5, 6, 7, D. Arzoumanian, M. Attard, A. Abergel 8, J. -P. Baluteau 9, J. -Ph. Bernard 10, L. Cambrésy, P. Cox, J. Di Francesco 11, A. M. di Giorgio, M. Griffin 12, P. Hargrave, M. Huang 13, J. Kirk 14, J. Z. Li 13, P. Martin 15, V. Minier 2, 3, M. -A. Miville-Deschênes 16, S. Molinari 17, G. Olofsson 18, S. Pezzuto 17, H. Roussel 19, D. Russeil 9, P. Saraceno 17, M. Sauvage 1, B. Sibthorpe 20, L. Spinoglio 21, L. Testi 22, D. Ward-Thompson 12, G. White 23, C. D. Wilson, A. Woodcraft 20, A. Zavagno 9, 24

(2010)

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 35 arcsec in Aquila and 59 arcsec 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.

1:	Astrophysique Interactions Multi-échelles (AIM)
	CNRS : UMR7158 – INSU – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
2:	Laboratoire AIM (AIM)
	CEA – Université Paris VII - Paris Diderot
3:	Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA) (IRFU)
	CEA : DSM/IRFU
4:	Laboratoire d'Astrophysique de Bordeaux (LAB)
	CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I
5:	Observatoire aquitain des sciences de l'univers (OASU)
	CNRS : UMS2567 – INSU – Université Sciences et Technologies - Bordeaux I
6:	Université Sciences et Technologies - Bordeaux 1
	Université Sciences et Technologies - Bordeaux I
7:	Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB)
	CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I
8:	Institut d'astrophysique spatiale (IAS)
	CNRS : UMR8617 – INSU – Université Paris XI - Paris Sud
9:	Laboratoire d'Astrophysique de Marseille (LAM)
	CNRS : UMR6110 – INSU – Université de Provence - Aix-Marseille I
10:	Centre d'étude spatiale des rayonnements (CESR)
	CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III
11:	National Research Council of Canada, Herzberg Institute of Astrophysics
	Herzberg Institute of Astrophysics
12:	School of Physics & Astronomy
	Cardiff University
13:	National Astronomical Observatories
	Chinese Academy of Sciences
14:	School of Physis & Astronomy
	Cardiff University
15:	CITA
	University of Toronto
16:	Institut d'Astrophysique Spatiale
	Aucune
17:	Interplanetary Space Physics Institute (IFSI) (IFSI-INAF)
	Interplanetary Space Physics Institute
18:	Stockholm University
	Stockholm University
19:	Institut d'Astrophysique de Paris (IAP)
	CNRS : UMR7095 – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI
20:	Royal Observatory Edinburgh
	Royal Observatory Edinburgh
21:	Antarctic Research a European Network for Astrophysics (ARENA)
	CEA
22:	European Southern Observatory (ESO)
	ESO
23:	Rutherford Appleton Laboratory - Didcot (RAL)
	Science & Technologie Facilities Council
24:	Observatoire Astronomique de Marseille Provence (OAMP)
	INSU – Université de Provence - Aix-Marseille I – CNRS : UMR6110

Subject

:

Sciences of the Universe/Astrophysics/Solar and Stellar Astrophysics Physics/Astrophysics/Solar and Stellar Astrophysics

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From: Marie-Paule Pomies <>

Submitted on: Monday, 4 October 2010 12:32:11

Updated on: Monday, 4 October 2010 12:32:11