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On the Power to Constrain the Accretion History of Massive Black Holes via Spin Measurements by Upcoming X-Ray Telescopes
Zhang,Xiaoxia1; Lu,Youjun2,3; Wang,Dandan4; Fang,Taotao1
2020-06-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume896Issue:1
AbstractAbstract The spin distribution of massive black holes (MBHs) contains rich information on their assembly history. However, only limited information can be extracted from currently available spin measurements of MBHs owing to the small sample size and large measurement uncertainties. Upcoming X-ray telescopes with improved spectral resolution and larger effective area are expected to provide new insights into the growth history of MBHs. Here we investigate, at a proof of concept level, how stringent constraints can be placed on the accretion history of MBHs by the spin measurements from future X-ray missions. We assume a toy model consisting of a two-phase accretion history composed of an initial coherent phase with a constant disk orientation, followed by a chaotic phase with random disk orientations in each accretion episode. By utilizing mock spin data generated from such models and performing Bayesian Markov Chain Monte Carlo simulations, we find that most accretion models of MBHs can be reconstructed provided that MBH spins are measured with an accuracy of . We also quantify the precision of the reconstructed parameters by adopting various combinations of sample sizes and spin accuracies, and find that the sample size is more crucial to model reconstruction once the spin accuracy reaches ~0.1. To some extent, a better spin accuracy will compensate for a small sample size and vice versa. Future X-ray missions such as the Advanced Telescope for High Energy Astrophysics and the enhanced X-ray Timing and Polarimetry mission, may provide spin measurements of ?100 MBHs with an uncertainty of ~0.04–0.1 and will thus put strong constraints on the MBH growth history.
KeywordAccretion black hole physics Galaxy nuclei
DOI10.3847/1538-4357/ab8dbf
Language英语
WOS IDIOP:0004-637X-896-1-ab8dbf
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/63522
Collection中国科学院国家天文台
Affiliation1.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China; zhangxx@xmu.edu.cn, fangt@xmu.edu.cn
2.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China; luyj@nao.cas.cn
3.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, People’s Republic of China
4.Department of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
Recommended Citation
GB/T 7714
Zhang,Xiaoxia,Lu,Youjun,Wang,Dandan,et al. On the Power to Constrain the Accretion History of Massive Black Holes via Spin Measurements by Upcoming X-Ray Telescopes[J]. The Astrophysical Journal,2020,896(1).
APA Zhang,Xiaoxia,Lu,Youjun,Wang,Dandan,&Fang,Taotao.(2020).On the Power to Constrain the Accretion History of Massive Black Holes via Spin Measurements by Upcoming X-Ray Telescopes.The Astrophysical Journal,896(1).
MLA Zhang,Xiaoxia,et al."On the Power to Constrain the Accretion History of Massive Black Holes via Spin Measurements by Upcoming X-Ray Telescopes".The Astrophysical Journal 896.1(2020).
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