A measure of cosmological distance using the C-IV Baldwin effect in quasars
文献类型：期刊论文
| 作者 | Huang, Long4,5 ; Wang, Hui3; Gao, Zhifu2; Zeng, Xiangyun1; Chang, Zhangyong4,5
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| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2023-06-16 |
| 卷号 | 674页码:8 |
| 关键词 | dark energy quasars: emission lines quasars: general distance scale |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202244644 |
| 通讯作者 | Huang, Long(huanglong20122021@163.com) |
| 英文摘要 | We use the anticorrelation between the equivalent width (EW) of the CIV 1549 angstrom emission line and the continuum luminosity in the quasars rest frame (Baldwin e ffect) to measure their luminosity distance as well as estimate cosmological parameters. We obtain a sample of 471 Type I quasars with the UV-optical spectra and EW (C iv) measurements in the redshift range of 2.3 < z < 7.1 including 25 objects at 5 < z < 7.1, which can be used to investigate the C iv Baldwin e ffect and determine cosmological luminosity distance. The relation EW(CIV) proportional to(lambda L-lambda)(gamma) can be applied to check the inverse correlation between the CIV EW and L-lambda of quasars and give their distance, and the data suggest that the EW of C iv is inversely correlated with continuum monochromatic luminosities. On the other hand, we also consider dividing the Type I quasar sample into various redshift bins, which can be used to check if the CIV EW-luminosity relation depends on the redshift. Finally, we apply a combination of Type I quasars and Type Ia supernovae (SNIa) of the Pantheon sample to test the property of dark energy concerning whether or not its density deviates from the constant, and give the statistical results. |
| WOS关键词 | BLACK-HOLE MASSES ; EMISSION-LINE ; DATA RELEASE ; RADIO-LOUD ; CATALOG ; SPECTRA ; LIGHT ; IA ; CONSTRAINTS ; INDICATORS |
| 资助项目 | National Natural Science Foundation of China[12203029] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001024440700055 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5430]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Huang, Long |
| 作者单位 | 1.China Three Gorges Univ, Coll Sci, Yichang 443000, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.China West Normal Univ, Sch Phys & Astron, Nanchong 637000, Peoples R China 4.Key Lab Funct Microscale Mat Jiangxi Prov, Jiujiang 332000, Peoples R China 5.Jiujiang Univ, Coll Sci, Jiujiang 332000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Long,Wang, Hui,Gao, Zhifu,et al. A measure of cosmological distance using the C-IV Baldwin effect in quasars[J]. ASTRONOMY & ASTROPHYSICS,2023,674:8. |
| APA | Huang, Long,Wang, Hui,Gao, Zhifu,Zeng, Xiangyun,&Chang, Zhangyong.(2023).A measure of cosmological distance using the C-IV Baldwin effect in quasars.ASTRONOMY & ASTROPHYSICS,674,8. |
| MLA | Huang, Long,et al."A measure of cosmological distance using the C-IV Baldwin effect in quasars".ASTRONOMY & ASTROPHYSICS 674(2023):8. |
入库方式： OAI收割
来源：新疆天文台
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