Application of a Space-based Optical Interferometer Toward Measuring Cosmological Distances of Quasars | |
Huang, Ying-Ke2; Fang, Yue-Dong2; Lu KX(卢开兴)1; Zhang, Zhi-Xiang3; Liu, Ji-Lin2; Li SS(李莎莎)1; Luo, Bao-Rui2; Lin, Qin2; Huo, Zhuo-Xi2 | |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
2022-03-01 | |
卷号 | 22期号:3 |
关键词 | (galaxies:) quasars: emission lines techniques: interferometric (cosmology:) distance scale |
ISSN号 | 1674-4527 |
DOI | 10.1088/1674-4527/ac4703 |
产权排序 | 第2完成单位 |
文献子类 | Article |
英文摘要 | Measuring quasar distance through joint analysis of spectroastrometry and reverberation mapping observations is a new method for driving the development of cosmology. In this paper, we carry out detailed simulation and analysis to study the effect of four basic observational parameters (baseline length, exposure time, equivalent diameter and spectral resolution) on the data quality of differential phase curves (DPCs), and furthermore on the accuracy of distance measurement. In our simulation, we adopt an axisymmetrical disk model of a broad line region (BLR) to generate differential phase signals. We find that the differential phases and their Poisson errors could be amplified by extending the baseline, while the influence of optical path difference errors can be reduced during fitting the BLR model. Longer exposure time or larger equivalent diameter helps reduce the absolute Poisson error. Therefore, the relative error of DPCs could be reduced by increasing any of the above three parameters, then the accuracy of distance measurement could be improved. In contrast, the uncertainty of absolute angular distances (D (A)) could be improved with higher spectral resolution, although the relative error of DPCs would be amplified. We show how the uncertainty of distance measurement varies with the relative error of DPCs. For our specific set of model parameters, without considering more complicated structures and kinematics of BLRs in our simulation, it is found that the relative error of DPCs < 20% is a limit for accurate distance measurement. The relative error of DPCs has a lower limit (roughly 5%) and the uncertainty in distance measurement can be better than 2%. |
学科主题 | 物理学 ; 光学 ; 天文学 ; 天体物理学 ; 实测天体物理学 |
URL标识 | 查看原文 |
出版地 | 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA |
资助项目 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12003077] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11703077] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12073068] ; Yunnan Province Foundation[202001AT070069] |
WOS关键词 | ACTIVE GALACTIC NUCLEI ; BROAD-LINE REGION ; REVERBERATION MAPPING DATA ; SUPERMASSIVE BLACK-HOLES ; ROTATING GAS DISKS ; CENTRAL MASSES ; SPECTROASTROMETRY ; ASTRONOMY ; CAMPAIGN ; GALAXIES |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
WOS记录号 | WOS:000766595900001 |
资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12003077, 11703077, 12073068] ; Yunnan Province Foundation[202001AT070069] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24969] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Huang, Ying-Ke |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; 2.Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100081, China; huangyingke@qxslab.cn, huozhuoxi@qxslab.cn; 3.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, China |
推荐引用方式 GB/T 7714 | Huang, Ying-Ke,Fang, Yue-Dong,Lu KX,et al. Application of a Space-based Optical Interferometer Toward Measuring Cosmological Distances of Quasars[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(3). |
APA | Huang, Ying-Ke.,Fang, Yue-Dong.,Lu KX.,Zhang, Zhi-Xiang.,Liu, Ji-Lin.,...&Huo, Zhuo-Xi.(2022).Application of a Space-based Optical Interferometer Toward Measuring Cosmological Distances of Quasars.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(3). |
MLA | Huang, Ying-Ke,et al."Application of a Space-based Optical Interferometer Toward Measuring Cosmological Distances of Quasars".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.3(2022). |
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