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The Hubble diagram of metal-rich QSOs and deceleration parameter q0 |
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| Authors: | Xie Guangzhong Mei Dongcheng K. S. Cheng Fan Junhui |
| Affiliation: | 1. Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China,,The National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100080, ChinaYunnan Astrophysics Center, Yunnan University, Kunming 650091, China 2. Department of Physics, University of Hong Kong, Hong Kong, China 3. Astrophysical Center, Guangzhou Normal University, Guanzhou 510400, China |
| Abstract: | For 163 metal-rich Quasars, the mv-logZ diagram shows a very close correlation. Using multiple regression analysis for these sources (N = 163), we obtained q0,= 1.142 and correlation coefficient γ = 0.69. These results suggested that the Universe is closed and all metal-rich quasars are of a single category. On the other hand, the evolution is very small at Z⩽2 for metal-rich quasars. |
| Keywords: | quasars Hubble diagram deceleration parameter |
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