Rossby wave instability in 3D discs

	Rossby wave instability in 3D discs
	Meheut, H 1; Yu C(余聪)2,3,4 ; Lai, D 2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2012-05
卷号	422 期号:3 页码:2399-2406
关键词	accretion accretion discs hydrodynamics instabilities planets and satellites: formation protoplanetary discs
ISSN号	0035-8711
通讯作者	Meheut, H (reprint author), Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
产权排序	第三完成单位
英文摘要	The Rossby wave instability (RWI) is a promising mechanism for producing large-scale vortices in protoplanetary discs. The instability operates around a density bump in the disc, and the resulting vortices may facilitate planetesimal formation and angular momentum transfer in the disc dead zone. Most previous works on the RWI deal with 2D (height-integrated) discs. However, vortices in 3D may have different dynamical behaviours from those in 2D. Recent numerical simulations of the RWI in 3D global discs by Meheut et al. have revealed intriguing vertical structure of the vortices, including appreciable vertical velocities. In this paper we present a linear analysis of the RWI, in 3D global models of isothermal discs. We calculate the growth rates of the Rossby modes (of various azimuthal wave numbers m= 26) trapped around the fiducial density bump and carry out 3D numerical simulations to compare with our linear results. We show that the 3D RWI growth rates are only slightly smaller than the 2D growth rates, and the velocity structures seen in the numerical simulations during the linear phase are in agreement with the velocity eigenfunctions obtained in our linear calculations. This numerical benchmark shows that numerical simulations can accurately describe the instability. The angular momentum transfer rate associated with Rossby vortices is also studied.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	THIN ACCRETION DISKS ; PROTOPLANETARY DISKS ; 3-DIMENSIONAL VORTICES ; PLANET INTERACTIONS ; G-MODE ; OSCILLATIONS ; SIMULATIONS ; STABILITY ; COROTATION ; EXCITATION
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/422/3/2399
语种	英语
WOS记录号	WOS:000303858400044
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4536]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Physikalisches Institut & Center for Space and Habitability, Universität Bern, 3012 Bern, Switzerland 2.Department of Astronomy, Cornell University, Ithaca, NY 14853, USA 3.National Astronomical Observatories/Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Meheut, H,Yu C,Lai, D. Rossby wave instability in 3D discs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,422(3):2399-2406.
APA	Meheut, H,Yu C,&Lai, D.(2012).Rossby wave instability in 3D discs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,422(3),2399-2406.
MLA	Meheut, H,et al."Rossby wave instability in 3D discs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 422.3(2012):2399-2406.