[en] The well defined selection function of the XMM-LSS survey enables a simultaneous modelling of the observed cluster number counts and of the evolution of the L-T relation. We present results pertaining to the first 5 deg2 for a well controlled sample comprising 30 objects: they are compatible with the WMAP3 parameter set along with cluster self-similar evolution. Extending such a survey to 200 deg2 would (1) allow discriminating between the major scenarios of the cluster L-T evolution and (2) provide a unique self-sufficient determination of sigma8 and Gamma with an accuracy of ~ 5% and 10% respectively, when adding mass information from weak lensing and S-Z observations.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Pierre, M.
Pacaud, F.
Adami, C.
Altieri, B.
Andreon, S.
Chiappetti, L.
Detal, A.
Duc, P.-A.
Galaz, G.
Gueguen, A.
Le Fèvre, J.-P.
Hertling, G.
Libbrecht, C.
Melin, J.-B.
Ponman, T. J.
Quintana, H.
Refregier, A.
Sprimont, P.-G.
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
