A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Euclid preparation : XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis (2022)

Euclid Collaboration. (2022). Euclid preparation : XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis. Astronomy and Astrophysics, 657, Article A91. https://doi.org/10.1051/0004-6361/202141556

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Euclid Collaboration

Lehti tai sarja: Astronomy and Astrophysics

ISSN: 0004-6361

eISSN: 1432-0746

Julkaisuvuosi: 2022

Volyymi: 657

Artikkelinumero: A91

Kustantaja: EDP Sciences

Julkaisumaa: Ranska

Julkaisun kieli: englanti

DOI: https://doi.org/10.1051/0004-6361/202141556

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/80069

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2106.08346

Tiivistelmä

The combination and cross-correlation of the upcoming Euclid data with cosmic microwave background (CMB) measurements is a source of great expectation since it will provide the largest lever arm of epochs, ranging from recombination to structure formation across the entire past light cone. In this work, we present forecasts for the joint analysis of Euclid and CMB data on the cosmological parameters of the standard cosmological model and some of its extensions. This work expands and complements the recently published forecasts based on Euclid-specific probes, namely galaxy clustering, weak lensing, and their cross-correlation. With some assumptions on the specifications of current and future CMB experiments, the predicted constraints are obtained from both a standard Fisher formalism and a posterior-fitting approach based on actual CMB data. Compared to a Euclid-only analysis, the addition of CMB data leads to a substantial impact on constraints for all cosmological parameters of the standard Λ-cold-dark-matter model, with improvements reaching up to a factor of ten. For the parameters of extended models, which include a redshift-dependent dark energy equation of state, non-zero curvature, and a phenomenological modification of gravity, improvements can be of the order of two to three, reaching higher than ten in some cases. The results highlight the crucial importance for cosmological constraints of the combination and cross-correlation of Euclid probes with CMB data.

YSO-asiasanat: kosmologia; maailmankaikkeus; kosminen taustasäteily; mikroaallot; pimeä aine; pimeä energia

Vapaat asiasanat: large-scale structure of Universe; cosmic background radiation; surveys; methods: statistical

Liittyvät organisaatiot

OKM-raportointi: Kyllä

VIRTA-lähetysvuosi: 2022

JUFO-taso: 2