CODE

Constraining Dark Energy: an observational study of the properties of dark energy and dark matter

Coordinatore	UNIVERSITEIT LEIDEN    more  Organization address address: RAPENBURG 70 city: LEIDEN postcode: 2300 RA contact info Titolo: Mr. Nome: Ton Cognome: Brouwer Email: send email
Nazionalità Coordinatore	Netherlands [NL]
Totale costo	100˙000 €
EC contributo	100˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-IRG-2008
Funding Scheme	MC-IRG
Anno di inizio	2008
Periodo (anno-mese-giorno)	2008-09-01   -   2012-08-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITEIT LEIDEN  Organization address address: RAPENBURG 70 city: LEIDEN postcode: 2300 RA contact info Titolo: Mr. Nome: Ton Cognome: Brouwer Email: send email	NL (LEIDEN)	coordinator	0.00

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 Obiettivo del progetto (Objective)

'The recent discovery that the expansion of the universe is accelerating due to an unknown “dark energy” highlights the limited understanding of the major constituents of the universe. This surprising result, along with the finding that most matter is invisible, sets the stage for research in cosmology at the start of the 21st century: the study of the distribution of “dark matter” and the properties of the dark energy are among the most important problems in astronomy. It is a data-driven endeavour since we lack a clear theoretical framework. The objective of this proposal is to advance observational constraints to a level where physical mechanisms that could underlie the dark energy can be distinguished. The method of choice for this proposal is a relatively new technique called “weak gravitational lensing”, which allows one to “map” the distribution of dark matter and how it evolves with time. It also provides a unique way to study the mass distribution in massive clusters of galaxies. Understanding the formation and physical properties of these rare systems is mandatory, if their number density as a function of mass and redshift is to be used as a cosmological tool. The aim of this proposal is to fully exploit the large amounts of world-class data the applicant has access to. The resulting measurements of the dark energy properties will be among the most accurate ones available, and this work will be an important step forward to reach the ultimate goal of percent level accuracy. In addition, a number of ancillary projects, in particular the study of dark matter halos around galaxies, will provide unique constraints on the properties of dark matter.'