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Cosmology with Strong Gravitational Lensing

Total Cost €


EC-Contrib. €






 COSMICLENS project word cloud

Explore the words cloud of the COSMICLENS project. It provides you a very rough idea of what is the project "COSMICLENS" about.

probes    yield    physics    monitoring    distributions    exploits    refute    independent    lensed    ia       einstein    constant    revealed    galaxy    cadence    suitable    probe    hydro    parameteric    distances    implementing    light    fom    form    capitalizing    flexible    transform       stage    model    framework    distance    sparse    revolutionized    supernovae    truly    measuring    cosmology    first    scales    discovering    calibration    methodology    mass    photometric    90s    accelerating    suyu    successful    precise    acceleration    boost    tds    simulation    feasible    dark    secure    pathfinders    precision    delay    enhancements    td    regularization    models    pi    h0    h0licow    few    phases    time    expansion    cosmological    courbin    cosmograil    simulations    modeling    source    single    chain    fundamental    reconstructed    so    discovery    mock    modular    lens    led    tension    questions    packages    quasars    coi    answering    hubble    repulsive    1920s    confirm    techniques    observational    40    universe    surveys    energy    lt    degeneracies   

Project "COSMICLENS" data sheet

The following table provides information about the project.


Organization address
address: BATIMENT CE 3316 STATION 1
postcode: 1015

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Switzerland [CH]
 Total cost 3˙129˙689 €
 EC max contribution 3˙129˙689 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2017-ADG
 Funding Scheme ERC-ADG
 Starting year 2018
 Duration (year-month-day) from 2018-10-01   to  2023-09-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
2    UNIVERSITE DE LIEGE BE (LIEGE) participant 697˙805.00


 Project objective

Measuring cosmological distances has revolutionized our understanding of the Universe, and is still doing so! Early work in the 1920s led to the discovery of the expansion of the Universe. More precise distance measurements in the 90s with type-Ia supernovae revealed that this expansion is accelerating, with crucial consequences in cosmology and physics. Is the acceleration due to some repulsive form of dark energy? To Einstein's cosmological constant? Do we need to consider new physics? Answering these fundamental questions requires a precise measurement of the Hubble parameter, H0, which is my goal using the time delay (TD) method in strongly lensed quasars.

The TD method exploits well-known physics on galaxy-scales. It is one of the very few techniques that can yield H0 to <2% using a single methodology. It involves no calibration, and is truly independent of any other cosmological probe. Capitalizing on the successful pathfinders COSMOGRAIL (PI: Courbin) and H0LiCOW (PI: Suyu, CoI: Courbin) time has come to fully exploit TDs with an observational, modeling and technical boost, organized in 2 phases.

Phase I will secure H0 to 2% using the current chain of analysis, with feasible enhancements beyond the current state-of the-art. This will confirm or refute the tension seen between H0 values with different cosmological probes. Phase II targets 1% precision, improving the FoM of Stage-IV cosmological surveys by 40%. The 4 proposed Work Packages can transform the field within the next 5 years by 1- implementing the first high-cadence photometric monitoring of lensed quasars to measure 50 new TDs, 2- providing new flexible non-parameteric lens models based on sparse regularization of the reconstructed source and lens mass/light distributions, 3- providing a modular end-to-end simulation framework to mock lensed systems from hydro-simulations and to evaluate in detail the impact model degeneracies on H0, 4- discovering new suitable lensed quasars in current surveys.


List of deliverables.
Data Management Plan Open Research Data Pilot 2019-07-22 16:48:44

Take a look to the deliverables list in detail:  detailed list of COSMICLENS deliverables.


year authors and title journal last update
List of publications.
2019 Sluse, Dominique
Strong lensing studies with the 3.6-m Devasthal Optical Telescope: opportunities and challenges
published pages: , ISSN: , DOI: 10.25518/0037-9565.8777
Strong lensing studies with the 3.6-m Devasthal Optical Telescope: opportunities and challenges. Bulletin de la Societe Royale des Sciences de Liege, 88, 152-157.Liège, BelgiumSociété Royale des Sciences de Liege. (2019). 1 2020-03-05
2019 D Sluse, C E Rusu, C D Fassnacht, A Sonnenfeld, J Richard, M W Auger, L Coccato, K C Wong, S H Suyu, T Treu, A Agnello, S Birrer, V Bonvin, T Collett, F Courbin, S Hilbert, L V E Koopmans, O Tihhanova, P J Marshall, G Meylan, A J Shajib, J Annis, S Avila, E Bertin, D Brooks, E Buckley-Geer, D L Burke, A Carnero Rosell, M Carrasco Kind, J Carretero, F J Castander, L N da Costa, J De Vicente, S
H0LiCOW – X. Spectroscopic/imaging survey and galaxy-group identification around the strong gravitational lens system WFI 2033−4723
published pages: 613-633, ISSN: 0035-8711, DOI: 10.1093/mnras/stz2483
Monthly Notices of the Royal Astronomical Society 490/1 2020-03-05

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