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题名:
Vertical Structure of Radiation-pressure-dominated Thin Disks: Link between Vertical Advection and Convective Stability
作者: Gong, Hong-Yu1,2; Gu, Wei-Min1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2017-04-20
卷号: 839, 期号:2
DOI: 10.3847/1538-4357/aa6976
学科分类: 天文学
收录类别: SCI
通讯作者: Gu, Wei-Min(Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China)
关键词: accretion, accretion disks ; black hole physics ; convection ; instabilities
英文摘要: In the classic picture of standard thin accretion disks, viscous heating is balanced by radiative cooling through the diffusion process, and the radiation-pressure-dominated inner disk suffers convective instability. However, recent simulations have shown that, owing to the magnetic buoyancy, the vertical advection process can significantly contribute to energy transport. In addition, in comparing the simulation results with the local convective stability criterion, no convective instability has been found. In this work, following on from simulations, we revisit the vertical structure of radiation-pressure-dominated thin disks and include the vertical advection process. Our study indicates a link between the additional energy transport and the convectively stable property. Thus, the vertical advection not only significantly contributes to the energy transport, but it also plays an important role in making the disk convectively stable. Our analyses may help to explain the discrepancy between classic theory and simulations on standard thin disks.
项目资助者: National Basic Research Program of China (973 Program)(2014CB845800) ; National Natural Science Foundation of China(11573023, 11333004, 11222328) ; CAS Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects(OP201503)
语种: 英语
原文出处: 查看原文
ISSN号: 0004-637X
文章类型: Article
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: ACCRETION DISKS ; BLACK-HOLES ; LUMINOSITIES
WOS记录号: WOS:000399876200013
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/10173
Appears in Collections:中国科学院天体结构与演化重点实验室_期刊论文

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作者单位: 1.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China

Recommended Citation:
Gong, Hong-Yu,Gu, Wei-Min. Vertical Structure of Radiation-pressure-dominated Thin Disks: Link between Vertical Advection and Convective Stability[J]. ASTROPHYSICAL JOURNAL,2017,839(2).
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