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The Hubble diagram of metal-rich QSOs and deceleration parameter q0

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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.

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Authors and Affiliations

  1. Yunnan Astronomical Observatory, Chinese Academy of Sciences, 650011, Kunming, China

    Xie Guangzhong & Mei Dongcheng

  2. The National Astronomical Observatories, Chinese Academy of Sciences, 100080, Beijing, China

    Xie Guangzhong & Mei Dongcheng

  3. Yunnan Astrophysics Center, Yunnan University, 650091, Kunming, China

    Xie Guangzhong & Mei Dongcheng

  4. Department of Physics, University of Hong Kong, Hong Kong, China

    K. S. Cheng

  5. Astrophysical Center, Guangzhou Normal University, 510400, Guanzhou, China

    Fan Junhui

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  1. Xie Guangzhong
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Correspondence to Xie Guangzhong.

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Xie, G., Mei, D., Cheng, K.S. et al. The Hubble diagram of metal-rich QSOs and deceleration parameter q0 . Sci. China Ser. A-Math. 44, 1081–1088 (2001). https://doi.org/10.1007/BF02878984

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  • DOI: https://doi.org/10.1007/BF02878984

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