diff --git a/docs/papers.yml b/docs/papers.yml index 3044ecb6d..c9284914b 100644 --- a/docs/papers.yml +++ b/docs/papers.yml @@ -372,3 +372,16 @@ papers: abstract: "Cosmic reionization of HI leaves enduring relics in the post-reionization intergalactic medium, potentially influencing the Lyman-α (Lyα) forest down to redshifts as low as z≈2, which is the so-called ''memory of reionization'' effect. Here, we re-analyze the baryonic acoustic oscillation (BAO) measurements from Lyα absorption and quasar correlations using data from the extended Baryonic Oscillation Spectroscopic Survey (eBOSS) Data Release 16 (DR16), incorporating for the first time the memory of reionization in the Lyα forest. Three distinct scenarios of reionization timeline are considered in our analyses. We find that the recovered BAO parameters (α∥, α⊥) remain consistent with the original eBOSS DR16 analysis. However, models incorporating reionization relics provide a better fit to the data, with a tantalizing preference for early reionization, consistent with recent findings from the James Webb Space Telescope. Furthermore, the inclusion of reionization relics significantly impacts the non-BAO parameters. For instance, we report deviations of up to 3σ in the Lyα redshift-space distortion parameter and ∼7σ in the linear Lyα bias for the late reionization scenario. Our findings suggest that the eBOSS Lyα data is more accurately described by models that incorporate a broadband enhancement to the Lyα forest power spectrum, highlighting the importance of accounting for reionization relics in cosmological analyses." image: https://raw.githubusercontent.com/MilesCranmer/PySR_Docs/paper-images/pr-1098/images/wedges.png date: 2025-11-14 + - title: "Symbolic regression analysis of dynamical dark energy with DESI-DR2 and SN data" + authors: + - Agripino Sousa-Neto (1) + - Carlos Bengaly (1) + - Javier E. Gonzalez (2) + - Jailson Alcaniz (1) + affiliations: + 1: Observatório Nacional + 2: Universidade Federal de Sergipe + link: https://doi.org/10.1016/j.dark.2025.102108 + abstract: "Recent measurements of Baryon Acoustic Oscillations (BAO) from the Dark Energy Spectroscopic Survey (DESI DR2), combined with data from the cosmic microwave background (CMB) and Type Ia supernovae (SNe), challenge the $\Lambda$-Cold Dark Matter ($\\Lambda$CDM) paradigm. They indicate a potential evolution in the dark energy equation of state (EoS), $w(z)$, as suggested by analyses that employ parametric models. In this paper, we use a model-independent approach known as high performance symbolic regression (PySR) to reconstruct $w(z)$ directly from observational data, allowing us to bypass prior assumptions about the underlying cosmological model. Our findings confirm that the DESI DR2 data alone agree with the $\Lambda$CDM model ($w(z) = -1$) at the redshift range considered. Additionally, when combining DESI data with existing compilations of SN distance measurements, such as Patheon+ and DESY5, we observe no deviation from the $\Lambda$CDM model within $3\\sigma$ (C.L.) for the interval of values of present-day matter density parameter $\\Omega_m$ and the sound horizon at the drag epoch $r_d$ currently constrained by observational data. Therefore, similarly to the DESI DR1 case, these results suggest that it is still premature to claim statistically significant evidence for a dynamical EoS or deviations from the $\\Lambda$CDM model based on the current DESI data in combination with supernova measurements." + image: DM_wz_sr_joint-1.png‎ + date: 2025-09-23