NAOC Open IR
On the Relation between the Hard X-Ray Photon Index and Accretion Rate for Super-Eddington Accreting Quasars
Huang, Jian1,2,3; Luo, Bin1,2,3; Du, Pu4; Hu, Chen4; Wang, Jian-Min4,5,6; Li, Yi-Jia7
2020-06-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume895Issue:2Pages:14
AbstractWe investigate whether the correlation between the hard X-ray photon index (Gamma) and accretion rate for super-Eddington accreting quasars is different from that for sub-Eddington accreting quasars. We construct a sample of 113 bright quasars from the Sloan Digital Sky Survey Data Release 14 quasar catalog, with 38 quasars as the super-Eddington subsample and 75 quasars as the sub-Eddington subsample. We derive black hole masses using a simple-epoch virial mass formula based on the H beta lines, and we use the standard thin disk model to derive the dimensionless accretion rates (M) over dot for our sample. The X-ray data for these quasars are collected from the Chandra and XMM-Newton archives. We fit the hard X-ray spectra using a single power-law model to obtain Gamma values. We find a statistically significant (R-S = 0.43, p = 7.75 x 10(-3)) correlation between Gamma and (M) over dot for the super-Eddington subsample. The Gamma-(M) over dot correlation for the sub-Eddington subsample is also significant, but weaker (R-S = 0.30, p = 9.98 x 10(-3)). Linear regression analysis shows that Gamma = (0.34 +/- 0.11) log (M) over dot + (1.71 +/- 0.17) and Gamma= (0.09 +/- 0.04) log (M) over dot + (1.93 +/- 0.04) for the super- and sub-Eddington subsamples, respectively. The Gamma - (M) over dot correlations of the two subsamples are different, suggesting different disk-corona connections in these two types of systems. We propose one qualitative explanation of the steeper Gamma - (M) over dot correlation in the super-Eddington regime that involves larger seed photon fluxes received by the compact coronae from the thick disks in super-Eddington accreting quasars.
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China
DOI10.3847/1538-4357/ab9019
WOS KeywordACTIVE GALACTIC NUCLEI ; SPECTRAL ENERGY-DISTRIBUTION ; AGN SPECTROSCOPIC SURVEY ; ABSORPTION-LINE QUASARS ; SLIM-DISK MODEL ; BLACK-HOLES ; RADIO-QUIET ; ARK 564 ; LUMINOSITY ; EMISSION
Language英语
Funding ProjectNational Natural Science Foundation of China[11991053] ; National Natural Science Foundation of China[11673010] ; National Key R&D program of China[2016YFA0400702] ; National Thousand Young Talents program of China
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D program of China ; National Key R&D program of China ; National Thousand Young Talents program of China ; National Thousand Young Talents program of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000539720700001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/83256
Collection中国科学院国家天文台
Corresponding AuthorLuo, Bin
Affiliation1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China
3.Collaborat Innovat Ctr Modern Astron & Space Expl, Nanjing 210093, Peoples R China
4.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China
5.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100020, Peoples R China
7.Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA
Recommended Citation
GB/T 7714
Huang, Jian,Luo, Bin,Du, Pu,et al. On the Relation between the Hard X-Ray Photon Index and Accretion Rate for Super-Eddington Accreting Quasars[J]. ASTROPHYSICAL JOURNAL,2020,895(2):14.
APA Huang, Jian,Luo, Bin,Du, Pu,Hu, Chen,Wang, Jian-Min,&Li, Yi-Jia.(2020).On the Relation between the Hard X-Ray Photon Index and Accretion Rate for Super-Eddington Accreting Quasars.ASTROPHYSICAL JOURNAL,895(2),14.
MLA Huang, Jian,et al."On the Relation between the Hard X-Ray Photon Index and Accretion Rate for Super-Eddington Accreting Quasars".ASTROPHYSICAL JOURNAL 895.2(2020):14.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Huang, Jian]'s Articles
[Luo, Bin]'s Articles
[Du, Pu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Huang, Jian]'s Articles
[Luo, Bin]'s Articles
[Du, Pu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, Jian]'s Articles
[Luo, Bin]'s Articles
[Du, Pu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.