Abstract
The non-linear relationship between the monochromatic X-ray and UV luminosities in quasars offers the possibility of using high-z quasars as standard candles for cosmological testing. In this paper, we use a high-quality catalog of 1598 quasars extending to redshift \(\sim 6\), to compare the flat and uniformly expanding cosmological model, \(R_{ {\mathrm{h}}}=ct\) and \(\Lambda \)CDM cosmological models which are the most debated. The quasar samples are mainly from the XMM-Newton and the Sloan Digital Sky Survey (SDSS). The final result is that the Akaike Information Criterion favors \(\Lambda \)CDM over \(R_{\mathrm{h}}=ct\) with a relative probability of \(\sim 86.30\%\) versus \(\sim 13.70\%\).
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We thank the anonymous referee for constructive comments.
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This work is supported by Yunnan Youth Basic Research Projects 202001AU070013, National Natural Science Foundation of China (No. 11863002), Yunnan Academician Workstation of Wang Jingxiu (No. 202005AF150025), and Sino-German Cooperation Project (No. GZ 1284).
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Fan and Hu wrote the main manuscript text and prepared figures 1-6 All authors reviewed the manuscript.”
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Fan, L., Fang, G. & Hu, J. A comparison of cosmological models with high-redshift quasars. Astrophys Space Sci 368, 59 (2023). https://doi.org/10.1007/s10509-023-04215-0
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DOI: https://doi.org/10.1007/s10509-023-04215-0