Revealing intrinsic flat ΛCDM biases with standardizable candles
| Autor: | E. Ó Colgáin, M. M. Sheikh-Jabbari, R. Solomon, G. Bargiacchi, S. Capozziello, M. G. Dainotti, D. Stojkovic |
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| Přispěvatelé: | Ó Colgáin, E., Sheikh-Jabbari, M. M., Solomon, R., Bargiacchi, G., Capozziello, S., Dainotti, M. G., Stojkovic, D. |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical Review D. 106 |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | Emerging high redshift cosmological probes, in particular quasars (QSOs), show a preference for larger matter densities, $\Omega_{m} \approx 1$, within the flat $\Lambda$CDM framework. Here, using the Risaliti-Lusso relation for standardizable QSOs, we demonstrate that the QSOs recover the \textit{same} Planck-$\Lambda$CDM Universe as Type Ia supernovae (SN), $\Omega_m \approx 0.3$ at lower redshifts $ 0 < z \lesssim 0.7$, before transitioning to an Einstein-de Sitter Universe ($\Omega_m =1$) at higher redshifts $z \gtrsim 1$. We illustrate the same trend, namely increasing $\Omega_{m}$ and decreasing $H_0$ with redshift, in SN but poor statistics prevent a definitive statement. We explain physically why the trend is expected in the flat $\Lambda$CDM cosmology, illustrate the intrinsic bias and non-Gaussian tails with mock Pantheon data, and identify a similar trend in BAO below $z=1$. Our results highlight an intrinsic bias in the flat $\Lambda$CDM Universe, whereby $\Omega_m$ increases, $H_0$ decreases and $S_8$ increases with effective redshift, thus providing a new perspective on $\Lambda$CDM tensions; even in a Planck-$\Lambda$CDM Universe the current tensions might have been expected. Comment: 6 pages, 7 figures, comments welcome; v2 matches published version |
| Databáze: | OpenAIRE |
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