Vortices in self-gravitating disks

被引:0
作者
Mamatsashvili, G. R. [1 ]
Rice, W. K. M. [1 ]
机构
[1] Univ Edinburgh, Inst Astron, SUPA, Edinburgh EH9 3HJ, Midlothian, Scotland
来源
COOL STARS, STELLAR SYSTEMS AND THE SUN | 2009年 / 1094卷
关键词
Hydrodynamics; Instabilities; Planetary systems: formation; protoplanetary disks; PROTOPLANETARY DISKS; SIMULATIONS; VORTEX; GROWTH; DISCS; GAS;
D O I
暂无
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Vortices are believed to greatly help the formation of km sized planetesimals by collecting dust particles in their centers. However, vortex dynamics is commonly studied in non-self-gravitating disks. The main goal here is to examine the effects of disk self-gravity on the vortex dynamics via numerical simulations. In the self-gravitating case, when quasi-steady gravitoturbulent state is reached, vortices appear as transient structures undergoing recurring phases of formation, growth to sizes comparable to a local Jeans scale and eventual shearing and destruction due to gravitational instability. Each phase lasts over 2-3 orbital periods. Vortices and density waves appear to be coupled implying that, in general, one should consider both vortex and density wave modes for a proper understanding of self-gravitating disk dynamics. Our results imply that given such an irregular and rapidly changing, transient character of vortex evolution in self-gravitating disks it may be difficult for such vortices to effectively trap dust particles in their centers that is a necessary process towards planet formation.
引用
收藏
页码:397 / 400
页数:4
相关论文
共 12 条
[1]  
BARGE P, 1995, ASTRON ASTROPHYS, V295, P1
[2]   The thermal regulation of gravitational instabilities in protoplanetary disks.: III.: Simulations with radiative cooling and realistic opacities [J].
Boley, Aaron C. ;
Mejia, Annie C. ;
Durisen, Richard H. ;
Cai, Kai ;
Pickett, Megan K. ;
D'Alessio, Paola .
ASTROPHYSICAL JOURNAL, 2006, 651 (01) :517-534
[3]   Nonlinear outcome of gravitational instability in cooling, gaseous disks [J].
Gammie, CF .
ASTROPHYSICAL JOURNAL, 2001, 553 (01) :174-183
[4]   Vortices in protoplanetary disks [J].
Godon, P ;
Livio, M .
ASTROPHYSICAL JOURNAL, 1999, 523 (01) :350-356
[5]  
Goldreich P., 1965, MNRAS, V130, P125, DOI [DOI 10.1093/MNRAS/130.2, 10.1093/mnras/130.2.125, DOI 10.1093/MNRAS/130.2.125]
[6]   Simulations of dust-trapping vortices in protoplanetary discs [J].
Johansen, A ;
Andersen, AC ;
Brandenburg, A .
ASTRONOMY & ASTROPHYSICS, 2004, 417 (01) :361-374
[7]   Vortices in thin, compressible, unmagnetized disks [J].
Johnson, BM ;
Gammie, CF .
ASTROPHYSICAL JOURNAL, 2005, 635 (01) :149-156
[8]   Amplification, saturation, and Q thresholds for runaway:: Growth of self-gravitating structures in models of magnetized galactic gas disks [J].
Kim, WT ;
Ostriker, EC .
ASTROPHYSICAL JOURNAL, 2001, 559 (01) :70-95
[9]   Formation of giant planets by concurrent accretion of solids and gas inside an anticyclonic vortex [J].
Klahr, H ;
Bodenheimer, P .
ASTROPHYSICAL JOURNAL, 2006, 639 (01) :432-440
[10]   Transient growth and coupling of vortex and wave modes in self-gravitating gaseous discs [J].
Mamatsashvili, G. R. ;
Chagelishvili, G. D. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 381 (02) :809-818