Disk-planet interaction simulations. I. Baroclinic generation of vortensity and nonaxisymmetric rossby wave instability

	Disk-planet interaction simulations. I. Baroclinic generation of vortensity and nonaxisymmetric rossby wave instability
	Ou, Shangli ; Ji, Jianghui ; Liu, Lin ; Peng, Xiaomeng
刊名	ASTROPHYSICAL JOURNAL
	2007-10-01
卷号	667 期号:2 页码:1220-1228
关键词	accretion accretion disks hydrodynamics instabilities methods : numerical planetary systems : protoplanetary disks
英文摘要	We use a multidimensional hydrodynamics code to study the gravitational interaction between an embedded planet and a protoplanetary disk, with emphasis on the generation of vortensity ( potential vorticity) through a baroclinic instability and subsequent development of Rossby wave instability (RWI). It is found that the generation of potential vorticity is very common and effective in nonbarotropic disks through the baroclinic instability, especially within the co-orbital region. Our results also complement previous studies by Koller and coworkers, which showed that nonaxisymmetric RWIs are likely to develop at local minima of potential vorticity distribution that are generated by the interaction between a planet and an inviscid barotropic disk. This second instability appears to be very common and robust, regardless of the equation of state, initial density distribution, and rotational law of the disk. The development of RWIs results in nonaxisymmetric density blobs, which exert stronger torques on the planet when they travel within its vicinity. As a result of that, large-amplitude oscillations are introduced to the time behavior of the total torque acting on the planet from the disk. In our current simulations, RWIs do not change the overall picture of inward orbital migration, but bring in a nonmonotonic behavior to the migration speed. As a side effect, RWIs also introduce interesting structures into the disk. These structures may help the formation of Earth-like planets in the habitable zone, or hot Earths interior to a close-in giant planet.
收录类别	SCI
语种	英语
WOS记录号	WOS:000249699200043
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7311]
专题	国家天文台_应用天文研究部
作者单位	1.Louisiana State Univ, Informat Technol Serv, Ctr Computat & Technol, Baton Rouge, LA 70803 USA 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA 5.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 6.Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
推荐引用方式 GB/T 7714	Ou, Shangli,Ji, Jianghui,Liu, Lin,et al. Disk-planet interaction simulations. I. Baroclinic generation of vortensity and nonaxisymmetric rossby wave instability[J]. ASTROPHYSICAL JOURNAL,2007,667(2):1220-1228.
APA	Ou, Shangli,Ji, Jianghui,Liu, Lin,&Peng, Xiaomeng.(2007).Disk-planet interaction simulations. I. Baroclinic generation of vortensity and nonaxisymmetric rossby wave instability.ASTROPHYSICAL JOURNAL,667(2),1220-1228.
MLA	Ou, Shangli,et al."Disk-planet interaction simulations. I. Baroclinic generation of vortensity and nonaxisymmetric rossby wave instability".ASTROPHYSICAL JOURNAL 667.2(2007):1220-1228.