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Cluster mass scaling relations through weak lensing measurements

Abstract : Galaxy clusters are essential cosmological and astrophysical tools, since they represent the largest and most massive gravitationally bound structures in the Universe. Through the study of their mass function, of their correlation function, and of the scaling relations between their mass and different observables, we can probe the predictions of cosmological models and structure formation scenarios. They are also interesting laboratories that allow us to study galaxy formation and evolution, and their interactions with the intra-cluster medium, in dense environments. For all of these goals, an accurate estimate of cluster masses is of fundamental importance. I studied the accuracy of the optical richness obtained by the RedGOLD cluster detection algorithm (Licitra et al. 2016) as a mass proxy, using weak lensing and X-ray mass measurements. I measured stacked weak lensing cluster masses for a sample of 1323 galaxy clusters in the CFHTLS W1 and in the NGVS at 0.2
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Submitted on : Tuesday, May 28, 2019 - 11:03:08 AM
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Carolina Parroni. Cluster mass scaling relations through weak lensing measurements. Instrumentation and Methods for Astrophysic [astro-ph.IM]. Université Sorbonne Paris Cité, 2017. English. ⟨NNT : 2017USPCC232⟩. ⟨tel-02141786⟩



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