The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties
Huang,Pinghui1,2,3; Dong,Ruobing4; Li,Hui3; Li,Shengtai3; Ji,Jianghui1,5
Source PublicationThe Astrophysical Journal Letters
AbstractAbstract Some circumstellar disks are observed to show prominent spiral arms in infrared scattered light or (sub-)millimeter dust continuum. The spirals might be formed from self-gravity, shadows, or planet–disk interactions. Recently, it was hypothesized that massive vortices can drive spiral arms in protoplanetary disks in a way analogous to planets. In this paper, we study the basic properties of vortex-driven spirals by the Rossby Wave Instability in 2D hydrodynamics simulations. We study how the surface density contrast, the number, and the shape of vortex-driven spirals depend on the properties of the vortex. We also compare vortex-driven spirals with those induced by planets. The surface density contrast of vortex-driven spirals in our simulations are comparable to those driven by a sub-thermal mass planet, typically a few to a few tens of Earth masses. In addition, different from the latter, the former is not sensitive to the mass of the vortex. Vortex-driven spiral arms are not expected to be detectable in current scattered light observations, and the prominent spirals observed in scattered light in a few protoplanetary disks, such as SAO?206462 (HD 135344B), MWC?758, and LkHα?330, are unlikely to be induced by the candidate vortices in them.
KeywordHydrodynamics Hydrodynamical simulations Planet formation Protoplanetary disks
WOS IDIOP:2041-8205-883-2-ab40c4
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.CAS Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China
2.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
3.Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
4.Department of Physics & Astronomy, University of Victoria, Victoria, BC, Canada
5.CAS Center for Excellence in Comparative Planetology, Hefei 230026, People’s Republic of China
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Huang,Pinghui,Dong,Ruobing,Li,Hui,et al. The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties[J]. The Astrophysical Journal Letters,2019,883(2).
APA Huang,Pinghui,Dong,Ruobing,Li,Hui,Li,Shengtai,&Ji,Jianghui.(2019).The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties.The Astrophysical Journal Letters,883(2).
MLA Huang,Pinghui,et al."The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties".The Astrophysical Journal Letters 883.2(2019).
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