GRAVITATIONAL INFALL ONTO MOLECULAR FILAMENTS

被引：86

作者：

Heitsch, Fabian ^{[1
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 769卷 / 02期

基金：

美国国家科学基金会;

关键词：

gravitation; ISM: clouds; magnetohydrodynamics (MHD); methods: analytical; stars: formation; FREE-FALL TIME; STAR-FORMATION; CLUSTER-FORMATION; CLOUD EVOLUTION; CORE POPULATION; MAGNETIC-FIELD; HELICAL FIELDS; COLLAPSE; FRAGMENTATION; ACCRETION;

D O I：

10.1088/0004-637X/769/2/115

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Two aspects of filamentary molecular cloud evolution are addressed: (1) exploring analytically the role of the environment for the evolution of filaments demonstrates that considering them in isolation (i.e., just addressing the fragmentation stability) will result in unphysical conclusions about the filament's properties. Accretion can also explain the observed decorrelation between FWHM and peak column density. (2) Free-fall accretion onto finite filaments can lead to the characteristic "fans" of infrared-dark clouds around star-forming regions. The fans may form due to tidal forces mostly arising at the ends of the filaments, consistent with numerical models and earlier analytical studies.

引用

页数：14

共 59 条

[1] From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt Survey [J].

Andre, Ph. ;

Men'shchikov, A. ;

Bontemps, S. ;

Koenyves, 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. ;

Merin, 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. ;

Cambresy, 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. .

ASTRONOMY & ASTROPHYSICS, 2010, 518

[2] Characterizing interstellar filaments with Herschel in IC 5146 [J].

Arzoumanian, D. ;

Andre, Ph. ;

Didelon, P. ;

Koenyves, V. ;

Schneider, N. ;

Men'shchikov, A. ;

Sousbie, T. ;

Zavagno, A. ;

Bontemps, S. ;

Di Francesco, J. ;

Griffin, M. ;

Hennemann, M. ;

Hill, T. ;

Kirk, J. ;

Martin, P. ;

Minier, V. ;

Molinari, S. ;

Motte, F. ;

Peretto, N. ;

Pezzuto, S. ;

Spinoglio, L. ;

Ward-Thompson, D. ;

White, G. ;

Wilson, C. D. .

ASTRONOMY & ASTROPHYSICS, 2011, 529

[3] Thermal condensation in a turbulent atomic hydrogen flow [J].

Audit, E ;

Hennebelle, P .

ASTRONOMY & ASTROPHYSICS, 2005, 433 (01) :1-U20

[4] Turbulent flow-driven molecular cloud formation:: A solution to the post-T tauri problem? [J].

Ballesteros-Paredes, J ;

Hartmann, L ;

Vázquez-Semadeni, E .

ASTROPHYSICAL JOURNAL, 1999, 527 (01) :285-297

[5] A turbulent MHD model for molecular clouds and a new method of accretion on to star-forming cores [J].

Balsara, D ;

Ward-Thompson, D ;

Crutcher, RM .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 327 (03) :715-720

[6]

BASTIEN P, 1983, ASTRON ASTROPHYS, V119, P109

[7] Collapse and fragmentation in finite sheets [J].

Burkert, A ;

Hartmann, L .

ASTROPHYSICAL JOURNAL, 2004, 616 (01) :288-300

[8]

CARROLLNELLENBA.J, 2013, APJ UNPUB

[9] Star formation in unbound giant molecular clouds: the origin of OB associations? [J].

Clark, PC ;

Bonnell, IA ;

Zinnecker, H ;

Bate, MR .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 359 (03) :809-818

[10] The onset of collapse in turbulently supported molecular clouds [J].

Clark, PC ;

Bonnell, IA .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 361 (01) :2-16

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