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Euclid preparation. LIII. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling

Euclid Collaboration G. Congedo L. Miller A. Taylor N. Cross C. Duncan +495 lainnya
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Abstrak

is a weak lensing shear measurement method developed for and Stage-IV surveys. It is based on forward modelling in order to deal with convolution by a point spread function (PSF) with comparable size to many galaxies, sampling the posterior distribution of galaxy parameters via Markov chain Monte Carlo, and marginalisation over nuisance parameters for each of the 1.5 billion galaxies observed by We quantified the scientific performance through high-fidelity images based on the Flagship simulations and emulation of the VIS images, realistic clustering with a mean surface number density of $ arcmin^ for galaxies, and $ arcmin^ for stars, and a diffraction-limited chromatic PSF with a full width at half maximum of $ $ and spatial variation across the field of view. measured objects with a density of $ arcmin^ in $4500 deg^2 $. The total shear bias was broken down into measurement (our main focus here) and selection effects (which will be addressed in future work). We found measurement multiplicative and additive biases of $m_1=(-3.6 $, $m_2=(-4.3 $, $c_1=(-1.78 $, and $c_2=(0.09 $; a large detection bias with a multiplicative component of $1.2 $ and an additive component of $-3 $; and a measurement PSF leakage of $ $ and $ $. When model bias is suppressed, the obtained measurement biases are close to requirement and largely dominated by undetected faint galaxies ($-5 $). Although significant, model bias will be straightforward to calibrate given its weak sensitivity on galaxy morphology parameters. is publicly available at

Topik & Kata Kunci

Physics Mathematics

Penulis (500)

E

Euclid Collaboration G. Congedo

L

L. Miller

A

A. Taylor

N

N. Cross

C

C. Duncan

T

T. Kitching

N

N. Martinet

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A

Astronomy

U

U. Manchester

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Oxford Road

M

Manchester

M

Mullard Space Science Laboratory

U

U. London

H

Holmbury St. Mary

D

Dorking

S

Surrey

A

A. Universit'e

C

Cnrs

C

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F

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U. Innsbruck

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Institut fur Teilchenphysik

I

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U. Bonn

A

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B

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I. D. Spatiale

O

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I

Institute of Cosmology

G

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U

U. Portsmouth

P

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Inaf Brera

M

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I

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I. Bologna

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D. Astronomia

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U. Bologna

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M. F. P. Physics

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U

Universitatssternwarte Munchen

F

F. Physik

L

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M

Munchen

I

I. Torino

P

Pino Torinese

D

D. Fisica

U

U. Genova

G

Genova

I

I. Genova

D

Department of PhysicsE. Pancini

U

U. Federico

N

Napoli

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I. -. Capodimonte

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I. Naples

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I. D. A. E. C. D. Espacco

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Caup

P

Porto

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Portugal

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U. Torino

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Torino

I

I. Torino

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1. ViaP.Giuria

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10125 Torino

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Inaf-Iasf Milano

I

I. Roma

M

M. Catone

I

I. Roma

R

Roma

I

Institut de F'isica d'Altes Energies

T

T. Z. F. O. Science

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Technology

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Campus Uab

B

Bellaterra

S

Spain.

P

Port d'Informaci'o Cient'ifica

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I. F. Physics

C

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Rwth Aachen University

A

Aachen

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Institute of Space Sciences

B

Barcelona

I

I. D. E. D. Catalunya

E

Edifici Rdit

C

C. Upc

C

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D

D. Bologna

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European Space AgencyESRIN

F

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E

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M

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1. Universit'eClaudeBernardLyon

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CNRSIN2p3

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I. O. Physics

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Laboratory of Astrophysics

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1. UCBLyon

I

Iuf

D

Departament de F'isica

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F. Ciencias

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Universidade Tecnica de Lisboa

C

C. Grande

L

Lisboa

D

D. O. Astronomy

U

U. Geneva

I

I. D. A. E. P. Spaziali

U

Universit'e de Paris Cit'e

C

Cea

A

Aim

G

Gif-sur-Yvette

I

Institut de Ci'encies de l'Espai

I

Inaf Trieste

T

Trieste

I

Istituto Nazionale Fisica Nucleare

S

Sezione Infn di Bologna

I

Inaf - Padova

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Padova

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I. Astrophysics

U

U. Oslo

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Blindern

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S. O. Physics

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Schwetzingen

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Kgs. Lyngby

D

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C

Cosmic Dawn Center

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I. Paris

U

Umr 7095

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Sorbonne Universit'e

P

Paris

M

M. Astronomie

H

Heidelberg

H

H. I. O. Physics

U

U. Helsinki

F

Finland.

C

Cppm

U

U. Paris

L

L. Observatory

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Leiden University

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Leiden

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The Netherlands.

U

U. Geneve

D

D'epartement de Physique Th'eorique

C

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G

Geneve

H

Helsinki

N

Nova Optical IR Instrumentation Group at Astron

D

Dwingeloo

D

Dipartimento di FisicaAldo Pontremoli

U

U. Milano

I

I. Milano

I

Institute for Computational Cosmology

D

D. University

U

Universit'e Cote d'Azur

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Observatoire Cote d'Azur

L

Laboratoire Lagrange

N

Nice

A

Astroparticule et Cosmologie

U

U. Sciences

A

A. Switzerland

S

School of Electrical Engineering

W

Windisch

E

European Space AgencyESTEC

N

Noordwijk

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S. O. Mathematics

S

Statistics

P

Physics

N

N. University

N

Newcastle-upon-Tyne

U

U. Aarhus

C

C. Aarhus

W

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U

U. Waterloo

W

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O

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C

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P. I. O. T. Physics

A

Astrophysique

I

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S

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I

Italian Space Agency

C

C. Toulouse

T

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Institute of Space Science

R

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I

Instituto de Astrof'isica de Canarias

S

San Crist'obal de La Laguna

T

Tenerife

D

D. Astrof'isica

U

U. L. Laguna

L

L. Laguna

D

D. Galilei'

U

U. Padova

I

INFN-Padova

F

Fcfm

U

U. D. Chile

S

Santiago

C

Chile

S

Satlantis

U

U. Park

L

Leioa-Bilbao

C

Centro de Investigaciones Energ'eticas

M

Medioambientales y Tecnol'ogicas

U

Universidad Polit'ecnica de Cartagena

D

D. D. E. Y. T. D. Computadoras

C

Cartagena

I

Institut de Recherche en Astrophysique et Plan'etologie

U

U. Toulouse

U

Ups

K

K. Institute

U

U. Groningen

G

Groningen

I

INFN-Bologna

I

Infrared Processing

A

A. Center

I

Ifpu

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Institute for Fundamental Physics of the Universe

-

-INAF

I

Istituto di Radioastronomia

D

D. Mathematics

P

Physics E. De Giorgi

U

University of Salento

L

Lecce

I

INAF-Sezione di Lecce

C

C. D. D. Fisica

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Infn

S

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Format Sitasi

APA MLA BibTeX
Congedo, E.C.G., Miller, L., Taylor, A., Cross, N., Duncan, C., Kitching, T. et al. (2024). Euclid preparation. LIII. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling. https://doi.org/10.1051/0004-6361/202450617

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Informasi Jurnal
Tahun Terbit
2024
Bahasa
en
Total Sitasi
4×
Sumber Database
Semantic Scholar
DOI
10.1051/0004-6361/202450617
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Open Access ✓