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Euclid preparation: Expected constraints on initial conditions

Euclid Collaboration F. Finelli Y. Akrami A. Andrews M. Ballardini S. Casas +495 lainnya
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The Euclid mission of the European Space Agency will deliver galaxy and cosmic shear surveys, which will be used to constrain initial conditions and statistics of primordial fluctuations. We present highlights for the Euclid scientific capability to test initial conditions beyond LCDM with the main probes, i.e. 3D galaxy clustering from the spectroscopic survey, the tomographic approach to 3x2pt statistics from photometric galaxy survey, and their combination. We provide Fisher forecasts from the combination of Euclid spectroscopic and photometric surveys for spatial curvature, running of the spectral index of the power spectrum of curvature perturbations, isocurvature perturbations, and primordial features. For the parameters of these models we also provide the combination of Euclid forecasts (pessimistic and optimistic) with current and future measurements of the cosmic microwave background (CMB) anisotropies., i.e. Planck, the Simons Observatory (SO), and CMB-S4. We provide Fisher forecasts for how the power spectrum and bispectrum from the Euclid spectroscopic survey will constrain the local, equilateral, and orthogonal shapes of primordial non-Gaussianity. We also review how Bayesian field-level inference of primordial non-Gaussianity can constrain local primordial non-Gaussianity. We show how Euclid, with its unique combination of the main probes, will provide the tightest constraints on low redshift to date. By targeting a markedly different range in redshift and scale, Euclid's expected uncertainties are complementary to those obtained by CMB primary anisotropy, returning the tightest combined constraints on the physics of the early Universe.

Topik & Kata Kunci

Physics

Penulis (500)

E

Euclid Collaboration F. Finelli

Y

Y. Akrami

A

A. Andrews

M

M. Ballardini

S

S. Casas

D

D. Karagiannis

Z

Z. Sakr

J

J. Valiviita

G

G. Alestas

N

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N. I. -. O. A. D. Bologna

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V. G. 933

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40129 Bologna

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Italy

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INFN-Bologna

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46 ViaIrnerio

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Instituto de F'isica Te'orica UAM-CSIC

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28014 Madrid

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C

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D

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C

Case Western Reserve University

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10900 Euclid Avenue

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OH 44106

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1. ViaGiuseppeSaragat

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Istituto Nazionale Fisica Nucleare

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Rwth Aachen University

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52056 Aachen

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Germany

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C. Town

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7535

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Institut fur theoretische Physik

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U. Heidelberg

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U. Toulouse

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Cnrs

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31400 Toulouse

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F. O. Sciences

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Beirut

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64 P.O.Box

0

0. Helsinki

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H

H. I. O. Physics

2

2. GustafHallstrominkatu

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U. Helsinki

H

Helsinki

D

D. Galilei'

U

U. Padova

8

8. viaMarzolo

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35131 Padova

I

INFN-Padova

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Inaf - Padova

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5. Viadell'Osservatorio

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35131 Padova

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Instituto de Astrof'isica de Canarias

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V'ia L'actea

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38205 La Laguna

T

Tenerife

U

U. L. Laguna

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D. Astrof'isica

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Departament de F'isica

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Chile

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Institute Lorentz

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2

2. NielsBohrweg

2

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T

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U

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48940 Leioa

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European Space AgencyESTEC

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2. Noordwijk

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55 Einsteinweg

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2333 CC Leiden

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I. Paris

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98 bis boulevard Arago

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75014

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Paris

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O. K. C. -. Physics

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S. University

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Stockholm

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Sweden

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Umr 7095

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Sorbonne Universit'e

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98 bis boulevard Arago

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7. Paris

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Universit'e Paris-Saclay

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I. D. Spatiale

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91405

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Orsay

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Esacesa

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Camino Bajo de Castillo

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Sn

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Urb. Villafranca del Castillo

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28692 Villanueva de la Canada

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U. Surrey

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Guildford

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GU2 7XH

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20133 Milano

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34127 Trieste

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11 ViaG.B.Tiepolo

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34127 Trieste

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Infn

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Sezione di Trieste

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2. ViaValerio

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TS 34127Trieste

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Sissa

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Via Bonomea 265

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62 vialeBertiPichat

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Genova

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I. Genova

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Department of PhysicsE. Pancini

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U. Federico

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80126

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Napoli

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10125 Torino

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Campus Uab

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Format Sitasi

APA MLA BibTeX
Finelli, E.C.F., Akrami, Y., Andrews, A., Ballardini, M., Casas, S., Karagiannis, D. et al. (2025). Euclid preparation: Expected constraints on initial conditions. https://www.semanticscholar.org/paper/77ec86e02de7b5faa69c0b85112244f47fb5d295

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