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Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping: Monte Carlo Simulations
Songsheng, Yu-Yang1,2; Li, Yan-Rong1; Du, Pu1; Wang, Jian-Min1,2,3
2021-04-01
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN0067-0049
Volume253Issue:2Pages:15
AbstractRecently, GRAVITY on board the Very Large Telescope Interferometer (VLTI) first spatially resolved the structure of the quasar 3C 273 with an unprecedented resolution of similar to 10 mu as. A new method of measuring parallax distances has been successfully applied to the quasar through joint analysis of spectroastrometry (SA) and reverberation mapping (RM) observation of its broad-line region (BLR). The uncertainty of this SA and RM (SARM) measurement is about 16% from real data, showing its great potential as a powerful tool for precision cosmology. In this paper, we carry out detailed analyses of mock data to study impacts of data qualities of SA observations on distance measurements and establish a quantitative relationship between statistical uncertainties of distances and relative errors of differential phases. We employ a circular disk model of the BLR for the SARM analysis. We show that SARM analyses of observations generally generate reliable quasar distances, even for relatively poor SA measurements with error bars of 40% at peaks of phases. Inclinations and opening angles of BLRs are the major parameters governing distance uncertainties. It is found that BLRs with inclinations greater than or similar to 10 degrees and opening angles less than or similar to 40 degrees are the most reliable regimes from SARM analysis for distance measurements. Through analysis of a mock sample of AGNs generated by quasar luminosity functions, we find that if the GRAVITY/GRAVITY+ can achieve a phase error of 01 per baseline for targets with magnitudes K less than or similar to 11.5, the SARM campaign can constrain H-0 to an uncertainty of 2% by observing 60 targets.
KeywordDistance measure Reverberation mapping Optical interferometry Hubble constant
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
DOI10.3847/1538-4365/abe539
WOS KeywordACTIVE GALACTIC NUCLEI ; BROAD-LINE REGION ; SUPERMASSIVE BLACK-HOLES ; HIGH ACCRETION RATES ; SINGLE-EPOCH SPECTRA ; H-BETA ; HUBBLE CONSTANT ; DARK ENERGY ; SEYFERT-GALAXIES ; DYNAMICAL MODELS
Language英语
Funding ProjectNational Key R&D Program of China[2016YFA0400701] ; NSFC[NSFC-11991050] ; NSFC[NSFC-11991054] ; NSFC[NSFC-11833008] ; NSFC[NSFC-11690024] ; NSFC[QYZDJ-SSW-SLH007] ; NSFC[XDB23010400]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000639933600001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78103
Collection中国科学院国家天文台
Corresponding AuthorWang, Jian-Min
Affiliation1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100020, Peoples R China
Recommended Citation
GB/T 7714
Songsheng, Yu-Yang,Li, Yan-Rong,Du, Pu,et al. Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping: Monte Carlo Simulations[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2021,253(2):15.
APA Songsheng, Yu-Yang,Li, Yan-Rong,Du, Pu,&Wang, Jian-Min.(2021).Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping: Monte Carlo Simulations.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,253(2),15.
MLA Songsheng, Yu-Yang,et al."Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping: Monte Carlo Simulations".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 253.2(2021):15.
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