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Long-lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks
Miranda, Ryan1,2; Li, Hui2; Li, Shengtai2; Jin, Sheng2,3
2017-02-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume835Issue:2Pages:9
Corresponding AuthorMiranda, Ryan(rjm456@cornell.edu)
AbstractA 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.
Keywordhydrodynamics protoplanetary disks submillimeter: planetary systems
DOI10.3847/1538-4357/835/2/118
WOS KeywordROSSBY-WAVE INSTABILITY ; LOPSIDED TRANSITION DISCS ; THIN ACCRETION DISKS ; TERM EVOLUTION ; HYDRODYNAMICAL SIMULATIONS ; CIRCUMSTELLAR DISKS ; DRIVEN ACCRETION ; IRS 48 ; VORTICES ; GAS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000394585800006
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23256
Collection中国科学院紫金山天文台
Corresponding AuthorMiranda, Ryan
Affiliation1.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
Recommended Citation
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.
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