Spherically Symmetric Accretion with Self-gravity: Analytical Formulae and Numerical Validation
文献类型：期刊论文
| 作者 | Jiao CL(焦承亮)2,3,4 ; Zhao EG(赵二刚)2,4; Zhu LY(朱俐颖)1,2,4; Shi XD(施相东)2,4
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-08-10 |
| 卷号 | 989期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/adec71 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Spherically symmetric accretion incorporating self-gravity constitutes a three-point boundary value problem (TPBVP) governed by constraints at the outer boundary, sonic point, and accretor surface. Previous studies have two limitations: either employing an incorrect formula for self-gravity potential in analytical treatments, or introducing additional input parameters in numerical implementations to circumvent solving the full TPBVP. To address these issues, we present a self-consistent TPBVP formulation, solved using the relaxation method. We also derive approximate analytical formulae that enable rapid estimates of self-gravity effects. Our analysis identifies a dimensionless parameter beta equivalent to 2G(rho)over bar r(out)(2)/a(out)(2) that characterizes the strength of self-gravity, where (rho)over bar and r(out) are the mean density and outer radius of the flow, respectively, and a(out) is the adiabatic sound speed of the external medium. For practical estimation, (rho)over bar may be approximated by the external medium density rho(out). We identify an upper limit for beta, beyond which steady accretion becomes unsustainable-a behavior consistent with classical gravitational instability that previous studies failed to capture. The accretion rate enhancement decreases monotonically as the adiabatic index gamma increases. For gamma = 5/3, self-gravity ceases to augment the accretion rate. These theoretical predictions are validated by our numerical solutions. We further apply our results to two astrophysical scenarios: hyper-Eddington accretion onto supermassive black hole seeds in the early Universe, where self-gravity is significant; and accretion onto stellar-mass objects embedded in active galactic nuclei disks, where self-gravity is non-negligible under certain conditions and should be evaluated using beta. |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | BLACK-HOLE ; MODIFIED STARS ; EVOLUTION ; QUASAR ; DISKS |
| 资助项目 | (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic) divided by Natural Science Foundation of Yunnan Province (Yunnan Natural Science Foundation)https://doi.org/10.13039/501100005273[202401AS070046]; (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic) divided by Natural Science Foundation of Yunnan Province (Yunnan Natural Science Foundation)https://doi.org/10.13039/501100005273[202503AP140013]; Science Foundation of Yunnan Province[020GJHZ2023030GC]; International Partnership Program of Chinese Academy of Sciences; Yunnan Revitalization Talent Support Program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001546224000001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic) divided by Natural Science Foundation of Yunnan Province (Yunnan Natural Science Foundation)https://doi.org/10.13039/501100005273[202401AS070046, 202503AP140013] ; Science Foundation of Yunnan Province[020GJHZ2023030GC] ; International Partnership Program of Chinese Academy of Sciences ; Yunnan Revitalization Talent Support Program |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28501]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Jiao CL(焦承亮) |
| 作者单位 | 1.University of Chinese Academy of Sciences, No. 1 Yanqihu East Road, Huairou District, 101408, Beijing, People’s Republic of China 2.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; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of China; 4.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People’s Republic of China; jiaocl@ynao.ac.cn; |
| 推荐引用方式 GB/T 7714 | Jiao CL,Zhao EG,Zhu LY,et al. Spherically Symmetric Accretion with Self-gravity: Analytical Formulae and Numerical Validation[J]. ASTROPHYSICAL JOURNAL,2025,989(1). |
| APA | 焦承亮,赵二刚,朱俐颖,&施相东.(2025).Spherically Symmetric Accretion with Self-gravity: Analytical Formulae and Numerical Validation.ASTROPHYSICAL JOURNAL,989(1). |
| MLA | 焦承亮,et al."Spherically Symmetric Accretion with Self-gravity: Analytical Formulae and Numerical Validation".ASTROPHYSICAL JOURNAL 989.1(2025). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。