Disk-planet interaction simulations. I. Baroclinic generation of vortensity and nonaxisymmetric rossby wave instability
文献类型：期刊论文
| 作者 | Ou, Shangli; Ji, Jianghui ; Liu, Lin; Peng, Xiaomeng
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 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 |
| ISSN号 | 0004-637X |
| 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ORBITAL COROTATION TORQUE ; GIANT PLANETS ; ACCRETION DISKS ; PROTOPLANET MIGRATION ; CONCURRENT ACCRETION ; EMBEDDED PROTOPLANET ; EXTRASOLAR PLANETS ; TIDAL INTERACTION ; VISCOUS DISK ; EVOLUTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000249699200043 |
| 公开日期 | 2012-02-05 |
| 源URL | [http://159.226.72.40/handle/332002/2466]  |
| 专题 | 紫金山天文台_太阳活动的多波段观测研究团组 |
| 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. |
入库方式： OAI收割
来源：紫金山天文台
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