HARD X-RAY PHOTON INDEX AS AN INDICATOR OF BOLOMETRIC CORRECTION IN ACTIVE GALACTIC NUCLEI
文献类型：期刊论文
| 作者 | Zhou, Xin-Lin ; Zhao, Yong-Heng
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2010-09-10 |
| 卷号 | 720期号:2页码:L206-L210 |
| 关键词 | black hole physics cosmology: observations galaxies: distances and redshifts X-rays: diffuse background |
| 英文摘要 | We propose the rest-frame 2-10 keV photon index, Gamma(2-10) (keV), acting as an indicator of the bolometric correction, L(bol)/L(2-10) (keV) (where L(bol) is the bolometric luminosity and L(2-10) (keV) is the rest-frame 2-10 keV luminosity), in radio-quiet active galactic nuclei (AGNs). Correlations between Gamma(2-10) (keV) and both bolometric correction and Eddington ratio are presented, based on simultaneous X-ray, UV, and optical observations of reverberation-mapped AGNs. These correlations can be compared with those for high-redshift AGNs to check for any evolutionary effect. Assuming no evolutionary effect in AGNs' spectral properties, together with the independent estimates of L(2-10) (keV), the bolometric correction, Eddington ratio, and black hole (BH) mass can all be estimated from these correlations for high-redshift AGNs, with the mean uncertainty of a factor of 2-3. If there are independent estimates of BH masses, Gamma(2-10) (keV) for high-redshift AGNs can be used to determine their true L(bol) and L(2-10) (keV), and in conjunction with the redshift can be potentially used to place constraints on cosmology by comparison with the rest-frame 2-10 keV flux. We find that the true L(2-10) (keV) estimated from Gamma(2-10) (keV) for the brightest Type I AGNs with z < 1 in the Lockman Hole is generally in agreement with the observed L(2-10) (keV). However, there are still many uncertainties, such as the accurate determination of the intrinsic Gamma(2-10) (keV) for distant AGNs and the large uncertainty in the luminosities |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000281610200016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7743]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Xin-Lin,Zhao, Yong-Heng. HARD X-RAY PHOTON INDEX AS AN INDICATOR OF BOLOMETRIC CORRECTION IN ACTIVE GALACTIC NUCLEI[J]. ASTROPHYSICAL JOURNAL LETTERS,2010,720(2):L206-L210. |
| APA | Zhou, Xin-Lin,&Zhao, Yong-Heng.(2010).HARD X-RAY PHOTON INDEX AS AN INDICATOR OF BOLOMETRIC CORRECTION IN ACTIVE GALACTIC NUCLEI.ASTROPHYSICAL JOURNAL LETTERS,720(2),L206-L210. |
| MLA | Zhou, Xin-Lin,et al."HARD X-RAY PHOTON INDEX AS AN INDICATOR OF BOLOMETRIC CORRECTION IN ACTIVE GALACTIC NUCLEI".ASTROPHYSICAL JOURNAL LETTERS 720.2(2010):L206-L210. |
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来源：国家天文台
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