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Clearing Residual Planetesimals by Sweeping Secular Resonances in Transitional Disks: A Lone-planet Scenario for the Wide Gaps in Debris Disks around Vega and Fomalhaut

文献类型：期刊论文

作者Lin, Douglas N. C.5,6,7; Zheng, Xiaochen1,3; Zhang, Xiaojia5; Mao, Shude1,2,3,5; Kouwenhoven, M. B. N.4
刊名ASTROPHYSICAL JOURNAL
出版日期2017-11-10
卷号849期号:2
关键词Methods: Numerical Planet-disk Interaction Planetary Systems Protoplanetary Disks Stars: Individual (Vega Fomalhaut)
DOI10.3847/1538-4357/aa8ef3
文献子类Article
英文摘要Extended gaps in the debris disks of both Vega and Fomalhaut have been observed. These structures have been attributed to tidal perturbations by multiple super-Jupiter gas giant planets. Within the current observational limits, however, no such massive planets have been detected. Here we propose a less stringent "lone-planet" scenario to account for the observed structure with a single eccentric gas giant and suggest that clearing of these wide gaps is induced by its sweeping secular resonance. With a series of numerical simulations, we show that the gravitational potential of the natal disk induces the planet to precess. At the locations where its precession frequency matches the precession frequency the planet imposes on the residual planetesimals, their eccentricity is excited by its resonant perturbation. Due to the hydrodynamic drag by the residual disk gas, the planetesimals undergo orbital decay as their excited eccentricities are effectively damped. During the depletion of the disk gas, the planet's secular resonance propagates inward and clears a wide gap over an extended region of the disk. Although some residual intermediate-size planetesimals may remain in the gap, their surface density is too low to either produce superEarths or lead to sufficiently frequent disruptive collisions to generate any observable dusty signatures. The main advantage of this lone-planet sweeping-secular-resonance model over the previous multiple gas giant tidal truncation scenario is the relaxed requirement on the number of gas giants. The observationally inferred upper mass limit can also be satisfied provided the hypothetical planet has a significant eccentricity. A significant fraction of solar or more massive stars bear gas giant planets with significant eccentricities. If these planets acquired their present-day kinematic properties prior to the depletion of their natal disks, their sweeping secular resonance would effectively impede the retention of neighboring planets and planetesimals over a wide range of orbital semimajor axes.
WOS关键词DYNAMICAL SHAKE-UP ; HR 8799 ; PROTOSTELLAR DISKS ; TIDAL INTERACTION ; SOLAR-SYSTEM ; LOW-MASS ; ORIGIN ; PROTOPLANETS ; COLLISIONS ; EVOLUTION
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000414587300018
资助机构National Science Foundation of China(11333003 ; National Science Foundation of China(11333003 ; National Natural Science Foundation of China(11010237 ; National Natural Science Foundation of China(11010237 ; Research Development Fund of Xi'an Jiaotong-Liverpool University (XJTLU)(RDF-16-01-16) ; Research Development Fund of Xi'an Jiaotong-Liverpool University (XJTLU)(RDF-16-01-16) ; 11390372) ; 11390372) ; 11050110414 ; 11050110414 ; 11173004 ; 11173004 ; 11573004) ; 11573004) ; National Science Foundation of China(11333003 ; National Science Foundation of China(11333003 ; National Natural Science Foundation of China(11010237 ; National Natural Science Foundation of China(11010237 ; Research Development Fund of Xi'an Jiaotong-Liverpool University (XJTLU)(RDF-16-01-16) ; Research Development Fund of Xi'an Jiaotong-Liverpool University (XJTLU)(RDF-16-01-16) ; 11390372) ; 11390372) ; 11050110414 ; 11050110414 ; 11173004 ; 11173004 ; 11573004) ; 11573004)
源URL[http://ir.bao.ac.cn/handle/114a11/20204]  
专题国家天文台_星系宇宙学研究部
作者单位1.Tsinghua Univ, Ctr Astrophys, Beijing 10086, Peoples R China
2.Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England
3.Tsinghua Univ, Dept Phys, Beijing 10086, Peoples R China
4.Xian Jiaotong Liverpool Univ, Dept Math Sci, 111 Renai Rd,Suzhou Ind Pk, Suzhou 215123, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100012, Peoples R China
6.Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
7.Tsinghua Univ, Inst Adv Studies, Beijing 10086, Peoples R China
推荐引用方式
GB/T 7714		 Lin, Douglas N. C.,Zheng, Xiaochen,Zhang, Xiaojia,et al. Clearing Residual Planetesimals by Sweeping Secular Resonances in Transitional Disks: A Lone-planet Scenario for the Wide Gaps in Debris Disks around Vega and Fomalhaut[J]. ASTROPHYSICAL JOURNAL,2017,849(2).
APA Lin, Douglas N. C.,Zheng, Xiaochen,Zhang, Xiaojia,Mao, Shude,&Kouwenhoven, M. B. N..(2017).Clearing Residual Planetesimals by Sweeping Secular Resonances in Transitional Disks: A Lone-planet Scenario for the Wide Gaps in Debris Disks around Vega and Fomalhaut.ASTROPHYSICAL JOURNAL,849(2).
MLA Lin, Douglas N. C.,et al."Clearing Residual Planetesimals by Sweeping Secular Resonances in Transitional Disks: A Lone-planet Scenario for the Wide Gaps in Debris Disks around Vega and Fomalhaut".ASTROPHYSICAL JOURNAL 849.2(2017).

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