Distance duality relation from x-ray and Sunyaev-Zel'dovich observations of clusters

Jean-Philippe Uzan (1) , Nabila Aghanim (2, 3) , Yannick Mellier (1)

1 IAP - Institut d'Astrophysique de Paris
2 IAS - Institut d'astrophysique spatiale
3 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique

X-ray and Sunyaev-Zel'dovich data of clusters of galaxies enable to construct a test of the distance duality relation between the angular and luminosity distances. We argue that such a test on large cluster samples may be of importance, as a consistency check, while trying to distinguish between various models accounting for the acceleration of the universe. The analysis of a data set of 18 clusters shows no significant violation of this relation for a Lambda-Cold Dark Matter (CDM) model. The origin and amplitude of systematic effects and the possibility to increase the precision of this method are discussed.

Domaines: Astrophysique [astro-ph]

Jean-Philippe Uzan, Nabila Aghanim, Yannick Mellier. Distance duality relation from x-ray and Sunyaev-Zel'dovich observations of clusters. Physical Review D, 2004, 70, pp.83533. ⟨10.1103/PhysRevD.70.083533⟩. ⟨hal-03784981⟩