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- W4380085890 abstract "Abstract Currently, the Λ cold dark matter model, which relies on the existence of cold dark matter and a cosmological constant Λ, best describes the universe. However, we lack information in the high-redshift ( z ) region between Type Ia supernovae (SNe Ia; up to z = 2.26) and the cosmic microwave background ( z = 1100), an interval crucial to test cosmological models and their possible evolution. We have defined a sample of 983 quasars up to z = 7.54 with a reduced intrinsic dispersion δ = 0.007, which determines the matter density parameter Ω M with the same precision of SNe Ia. Although previous analysis have used quasars as cosmological tools, this is the first time that high-redshift sources, in this case quasars, as standalone cosmological probes yield such tight constraints on Ω M . Our results show the importance of correcting cosmological relationships for selection biases and redshift evolution and how the choice of a golden sample reduces considerably the intrinsic scatter. This proves the reliability of quasars as standard cosmological candles." @default.
- W4380085890 created "2023-06-10" @default.
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- W4380085890 date "2023-06-01" @default.
- W4380085890 modified "2023-10-18" @default.
- W4380085890 title "Quasars: Standard Candles up to z = 7.5 with the Precision of Supernovae Ia" @default.
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- W4380085890 doi "https://doi.org/10.3847/1538-4357/accea0" @default.
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