Long-lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks
文献类型:期刊论文
作者 | Miranda, Ryan1,2; Li, Hui2; Li, Shengtai2; Jin, Sheng2,3 |
刊名 | ASTROPHYSICAL JOURNAL |
出版日期 | 2017-02-01 |
卷号 | 835期号:2页码:9 |
ISSN号 | 0004-637X |
关键词 | hydrodynamics protoplanetary disks submillimeter: planetary systems |
DOI | 10.3847/1538-4357/835/2/118 |
英文摘要 | A number of transition disks exhibit significant azimuthal asymmetries in thermal dust emission. One possible origin for these asymmetries is dust trapping in vortices formed at the edges of dead zones. We carry out high-resolution, two-dimensional hydrodynamic simulations of this scenario, including the effects of dust feedback. We find that, although feedback weakens the vortices and slows down the process of dust accumulation, the dust distribution in the disk can nonetheless remain asymmetric for many thousands of orbits. We show that even after 104 orbits, or 2.5 Myr when scaled to the parameters of Oph IRS 48 (a significant fraction of its age), the dust is not dispersed into an axisymmetric ring, in contrast to the case of a vortex formed by a planet. This is because accumulation of mass at the dead zone edge constantly replenishes the vortex, preventing it from being fully destroyed. We produce synthetic dust emission images using our simulation results. We find that multiple small clumps of dust may be distributed azimuthally. These clumps, if not resolved from one another, appear as a single large feature. A defining characteristic of a disk with a dead zone edge is that an asymmetric feature is accompanied by a ring of dust located about twice as far from the central star. |
WOS关键词 | ROSSBY-WAVE INSTABILITY ; LOPSIDED TRANSITION DISCS ; THIN ACCRETION DISKS ; TERM EVOLUTION ; HYDRODYNAMICAL SIMULATIONS ; CIRCUMSTELLAR DISKS ; DRIVEN ACCRETION ; IRS 48 ; VORTICES ; GAS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000394585800006 |
源URL | [http://libir.pmo.ac.cn/handle/332002/23255] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Miranda, Ryan |
作者单位 | 1.Cornell Univ, Dept Astron, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA 2.Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA 3.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Miranda, Ryan,Li, Hui,Li, Shengtai,et al. Long-lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks[J]. ASTROPHYSICAL JOURNAL,2017,835(2):9. |
APA | Miranda, Ryan,Li, Hui,Li, Shengtai,&Jin, Sheng.(2017).Long-lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks.ASTROPHYSICAL JOURNAL,835(2),9. |
MLA | Miranda, Ryan,et al."Long-lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks".ASTROPHYSICAL JOURNAL 835.2(2017):9. |
入库方式: OAI收割
来源:紫金山天文台
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