W. Turner

A multi-eigenbasis approach to covariance matrix denoising for cosmological inference

W. Turner

Accurate covariance matrix estimation is crucial to cosmological analyses, enabling unbiased parameter inference with well-calibrated uncertainties. Obtaining a reliable estimate generally requires far more independent samples than the dimension of the data vector, which is not always feasible. This challenge is especially …

A multi-eigenbasis approach to covariance matrix denoising for cosmological inference

W. Turner

Accurate covariance matrix estimation is crucial to cosmological analyses, enabling unbiased parameter inference with well-calibrated uncertainties. Obtaining a reliable estimate generally requires far more independent samples than the dimension of the data vector, which is not always feasible. This challenge is especially …

Supplementary data for: Probing the limits of cosmological information from the Lyman-alpha forest 2-point correlation functions

W. Turner, Andrei Cuceu, Paul Martini, J. Aguilar

Supplementary material to DESI's publication "Probing the limits of cosmological information from the Lyman-alpha forest 2-point correlation functions" to comply with the data management plan. Data points for each figure are provided.

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Probing the limits of cosmological information from the Lyman- α forest 2-point correlation functions

W. Turner, Andrei Cuceu, Paul Martini, J. Aguilar et autres

Abstract The standard cosmological analysis with the Ly α forest relies on a continuum fitting procedure that suppresses information on large scales and distorts the three-dimensional correlation function on all scales. In this work, we present the first cosmological forecasts without continuum …

us, it, gb, es, mx, ca, co, fr, kr, de, cn (code pays fourni par la source)

Data Release 1 of the Dark Energy Spectroscopic Instrument

M. Abdul Karim, A.G. Adame, David S. Aguado, J. Aguilar et autres

Abstract In 2021 May the Dark Energy Spectroscopic Instrument (DESI) collaboration began a 5 yr spectroscopic redshift survey to produce a detailed map of the evolving three-dimensional structure of the Universe between z = 0 and z ≈ 4. DESI’s principal scientific …

fr, es, us, in, gb, pl, mx, it, au, ca, kr, tw, cn, co, ch (code pays fourni par la source)

Galaxy Zoo: Cosmic Dawn – morphological classifications for over 41 000 galaxies in the Euclid Deep Field North from the Hawaii Two-0 Cosmic Dawn survey

James Pearson, Hugh Dickinson, Stephen Serjeant, Mike Walmsley et autres

We present morphological classifications of over 41 000 galaxies out to zphot ∼ 2.5 across six square degrees of the Euclid Deep Field North (EDFN) from the Hawaii Twenty Square Degree (H20) survey, a part of the wider Cosmic Dawn survey. Galaxy …

Calibrating redshift distributions at z > 2 with Lyman α forest cross-correlations

Qianjun Hang, Laura Casas, William d’Assignies, W. Turner et autres

ABSTRACT We explore the feasibility of using Lyman $\alpha$ (Ly $\alpha$) forests to calibrate the ensemble redshift distribution of the high-redshift tail ($2\lt z\lt 3$) of photometric galaxies. We use CoLoRe simulations to create mock DESI 5-yr Ly $\alpha$ forests and Rubin …

gb, es, us (code pays fourni par la source)

Calibrating redshift distributions at $z>2$ with Lyman-$α$ forest cross-correlations

Qianjun Hang, Laura Casas, William d'Assignies, W. Turner et autres

We explore the feasibility of using Lyman-$α$ (Ly$α$) forests to calibrate the ensemble redshift distribution of the high-redshift tail ($2

Calibrating redshift distributions at $z>2$ with Lyman-$α$ forest cross-correlations

Qianjun Hang, Laura Casas, William d'Assignies, W. Turner et autres

We explore the feasibility of using Lyman-$α$ (Ly$α$) forests to calibrate the ensemble redshift distribution of the high-redshift tail ($2<z<3$) of photometric galaxies. We use \texttt{CoLoRe} simulations to create mock DESI 5-year Ly$α$ forests and Rubin Observatory LSST 10-year photometric galaxies up …

gb, es, us (code pays fourni par la source)

Galaxy Zoo: Cosmic Dawn–morphological classifications for over 41 000 galaxies in the Euclid Deep Field North from the Hawaii Two-0 Cosmic Dawn survey

James F. Pearson, H. J. Dickinson, Stephen Serjeant, Mike Walmsley et autres

ABSTRACT We present morphological classifications of over 41 000 galaxies out to $z_{\rm phot}\sim 2.5$ across 6 deg2 of the Euclid Deep Field North (EDFN) from the Hawaii Twenty Square Degree (H20) survey, a part of the wider Cosmic Dawn survey. Galaxy …

gb, ca, us, fr, es, dk, pl, tw, ru, jp (code pays fourni par la source)

Extended dark energy analysis using DESI DR2 BAO measurements

K. Lodha, R. Calderón, William L. Matthewson, Arman Shafieloo et autres

We conduct an extended analysis of dark energy constraints, in support of the findings of the Dark Energy Spectroscopic Instrument (DESI) second data release cosmology key paper, including DESI data, Planck cosmic microwave background observations, and three different supernova compilations. Using a …

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Validation of the DESI DR2 measurements of baryon acoustic oscillations from galaxies and quasars

E. Paillas, Juan Mena-Fernández, Qinxun Li, Ashley J. Ross et autres

The Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2) galaxy and quasar clustering data represents a significant expansion of data from Data Release 1 (DR1), providing improved statistical precision in baryon acoustic oscillation (BAO) constraints across multiple tracers, including bright galaxies, …

us, cl, fr, gb, de, ve, mx, it, cz, es, ro, tw, ca, cn, bo, au, kr (code pays fourni par la source)