A model for the radio/X-ray correlation in three neutron star low-mass X-ray binaries 4U 1728-34, Aql X-lad, and EXO 1745-248
文献类型：期刊论文
| 作者 | Qiao, Erlin1,2 ; Liu, B. F.1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 487期号:2页码:1626-1633 |
| 关键词 | accretion, accretion discs black hole physics stars: neutron radio continuum: stars X-rays: binaries |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stz1365 |
| 英文摘要 | Observationally, for neutron star low-mass X-ray binaries, so far, the correlation between the radio luminosity L-R and the X-ray luminosity L-X, i.e. L-R proportional to L-X(beta), has been reasonably well-established only in three sources 411 1728-34, Aql X-1, and EXO 1745-248 in their hard state. The slope beta of the radio/X-ray correlation of the three sources is different, i.e. beta similar to 1.4 for 411 1728-34, beta similar to 0.4 for Aql X-1, and beta similar to 1.6 for EXO 1745-248. In this paper, for the first time we explain the different radio/X-ray correlation of 4U 1728-34, Aql X-1, and EXO 1745-248 with the coupled advection-dominated accretion flow (ADAF)-jet model, respectively. We calculate the emergent spectrum of the ADAF-jet model for L-X and L-R at different (m) over dot = /(M) over dot/(M) over dotE(dd)), adjusting eta (eta (M) over dot(jet)/(M) over dot, describing the fraction of the accreted matter in the ADAF transferred vertically forming the jet) to fit the observed radio/X-ray correlations. Then, we derive a fitting formula of eta as a function of (m) over dot for 4U 1728-34, Aql X-1, and EXO 1745-248, respectively. If the relation between eta and (m) over dot can be extrapolated down to a lower value of (m) over dot, we find that in a wide range of (m) over dot, the value of eta in Aql X-1 is greater than that of in 41J 1728-34 and EXO 1745-248, implying that Aql X-1 may have a relatively stronger large-scale magnetic field, which is supported by the discovery of the coherent millisecond X-ray pulsation in Aql X-1. |
| WOS关键词 | ADVECTION-DOMINATED ACCRETION ; BLACK-HOLES ; FLUX CORRELATION ; LOW/HARD STATE ; HARD STATES ; JET POWER ; EMISSION ; FLOWS ; BURSTS ; ENERGY |
| 资助项目 | National Natural Science Foundation of China[11773037] ; National Natural Science Foundation of China[11673026] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052100] ; National Program on Key Research and Development Project[2016YFA0400804] ; gravitational wave pilot B[XDB23040100] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000474919700009 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; gravitational wave pilot B ; gravitational wave pilot B ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; gravitational wave pilot B ; gravitational wave pilot B ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; gravitational wave pilot B ; gravitational wave pilot B ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; gravitational wave pilot B ; gravitational wave pilot B |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/26960]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Qiao, Erlin |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiao, Erlin,Liu, B. F.. A model for the radio/X-ray correlation in three neutron star low-mass X-ray binaries 4U 1728-34, Aql X-lad, and EXO 1745-248[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,487(2):1626-1633. |
| APA | Qiao, Erlin,&Liu, B. F..(2019).A model for the radio/X-ray correlation in three neutron star low-mass X-ray binaries 4U 1728-34, Aql X-lad, and EXO 1745-248.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,487(2),1626-1633. |
| MLA | Qiao, Erlin,et al."A model for the radio/X-ray correlation in three neutron star low-mass X-ray binaries 4U 1728-34, Aql X-lad, and EXO 1745-248".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 487.2(2019):1626-1633. |
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来源：国家天文台
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