Study of Advective Energy Transport in the Inflow and Outflow of Super-Eddington Accretion Flows

doi:10.3847/1538-4357/aceaf5

YNAO OpenIR > 双星与变星研究组

	Study of Advective Energy Transport in the Inflow and Outflow of Super-Eddington Accretion Flows
	Jiao CL(焦承亮)1,2,3
发表期刊	The Astrophysical Journal
	2023-09-01
卷号	955 期号:1
DOI	10.3847/1538-4357/aceaf5
产权排序	第1完成单位
收录类别	SCI
摘要	Photon trapping is believed to be an important mechanism in super-Eddington accretion, which greatly reduces the radiative efficiency as photons are swallowed by the central black hole before they can escape from the accretion flow. This effect is interpreted as the radial advection of energy in one-dimensional height-integrated models, such as the slim-disk model. However, when multidimensional effects are considered, the conventional understanding may no longer hold. In this paper, we study the advective energy transport in super-Eddington accretion based on a new two-dimensional inflow-outflow solution with radial self-similarity, in which the advective factor is calculated self-consistently by incorporating the calculation of radiative flux instead of being set as an input parameter. We found that radial advection is actually a heating mechanism in the inflow due to compression, and the energy balance in the inflow is maintained by cooling via radiation and vertical (theta-direction) advection, which transports entropy upward to be radiated closer to the surface or carried away by the outflow. As a result, fewer photons are advected inward, and more photons are released from the surface, so that the mean advective factor is smaller and the emergent flux is higher than the fluxes predicted by the slim-disk model. The radiative efficiency of super-Eddington accretion thus should be higher than that of the slim-disk model, which agrees with the results of some recent numerical simulations.
资助项目	MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11703083]; Natural Science Foundation of China
项目资助者	MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11703083] ; Natural Science Foundation of China
语种	英语
学科领域	天文学 ; 天体物理学 ; 高能天体物理学
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001119211000001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	RADIATION MAGNETOHYDRODYNAMIC SIMULATION ; BLACK-HOLES ; DOMINATED ACCRETION ; NUMERICAL SIMULATIONS ; GLOBAL STRUCTURE ; DISKS ; MODEL ; MATLAB ; DISCS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/26332
专题	双星与变星研究组中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People's Republic of China; [email protected]; 2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China; 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People's Republic of China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Jiao CL. Study of Advective Energy Transport in the Inflow and Outflow of Super-Eddington Accretion Flows[J]. The Astrophysical Journal,2023,955(1).
APA	焦承亮.(2023).Study of Advective Energy Transport in the Inflow and Outflow of Super-Eddington Accretion Flows.The Astrophysical Journal,955(1).
MLA	焦承亮."Study of Advective Energy Transport in the Inflow and Outflow of Super-Eddington Accretion Flows".The Astrophysical Journal 955.1(2023).

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