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Enabling Weak lensing Cosmology

Objective

Our understanding of cosmology and fundamental physics continues to be challenged by ever more precise experiments. The resulting “standard” model of cosmology describes the data well, but is unable to explain the origin of the main constituents of our Universe, namely dark matter and dark energy. More than an order of magnitude improvement in the quality and quantity of observational data is needed. This has motivated ESA to select Euclid as the second mission of its cosmic vision program, with a scheduled launch in 2020. It is designed to accurately measure the alignments of distant galaxies due to the differential deflection of light-rays by intervening structures, a phenomenon called gravitational lensing. Euclid will measure this signal by imaging 1.5 billion galaxies with a resolution similar to that of the Hubble Space Telescope.
Although Euclid is designed to minimize observational systematics the observations are still compromised by two factors. Various instrumental effects need to be corrected for, and the tremendous improvement in precision has to be matched with comparable advances in the modelling of astrophysical effects that affect the signal. The objective of this proposal is to make significant progress on both fronts. To do so, we will (i) quantify the morphology of galaxies using archival HST observations; (ii) carry out a unique narrow-band photometric redshift survey to obtain state-of-the-art constraints on the intrinsic alignments of galaxies that arise due to tidal interactions, and would otherwise contaminate the cosmological signal; (iii) integrate these results into the end-to-end simulation pipeline; (iv) perform a spectroscopic redshift survey to calibrate the photometric redshift technique. The Euclid Consortium has identified these as critical issues, which need to be addressed before launch, in order to maximise the science return of this exciting mission, and enable the dark energy science objectives of Europe.

Call for proposal

H2020-COMPET-2017
See other projects for this call

Coordinator

UNIVERSITY COLLEGE LONDON
Address
Gower Street
WC1E 6BT London
United Kingdom
Activity type
Higher or Secondary Education Establishments
EU contribution
€ 234 090

Participants (10)

UNIVERSITEIT LEIDEN
Netherlands
EU contribution
€ 28 750
Address
Rapenburg 70
2311 EZ Leiden
Activity type
Higher or Secondary Education Establishments
AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS
Spain
EU contribution
€ 267 742,50
Address
Calle Serrano 117
28006 Madrid
Activity type
Research Organisations
INSTITUTO DE FISICA DE ALTAS ENERGIAS
Spain
EU contribution
€ 163 167,50
Address
Campus De Bellaterra - Universidad Autonoma De Barcelona
08193 Cerdanyola Del Valles
Activity type
Research Organisations
CENTRO DE INVESTIGACIONES ENERGETICAS, MEDIOAMBIENTALES Y TECNOLOGICAS-CIEMAT
Spain
EU contribution
€ 163 167,50
Address
Avenida Complutense 40
28040 Madrid
Activity type
Research Organisations
UNIVERSITY OF DURHAM
United Kingdom
EU contribution
€ 180 885
Address
Stockton Road The Palatine Centre
DH1 3LE Durham
Activity type
Higher or Secondary Education Establishments
ISTITUTO NAZIONALE DI ASTROFISICA
Italy
EU contribution
€ 145 875
Address
Viale Del Parco Mellini 84
00136 Roma
Activity type
Research Organisations
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France
EU contribution
€ 190 490
Address
Rue Michel Ange 3
75794 Paris
Activity type
Other
RHEINISCHE FRIEDRICH-WILHELMS-UNIVERSITAT BONN
Germany
EU contribution
€ 134 706,25
Address
Regina Pacis Weg 3
53113 Bonn
Activity type
Higher or Secondary Education Establishments
MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Germany
EU contribution
€ 49 061,25
Address
Hofgartenstrasse 8
80539 Munchen
Activity type
Research Organisations
FCIENCIAS.ID - ASSOCIACAO PARA A INVESTIGACAO E DESENVOLVIMENTO DE CIENCIAS
Portugal
EU contribution
€ 29 218,75
Address
Campo Grande, Edificio C1, Piso 3
1749 016 Lisbon
Activity type
Research Organisations