Galaxy clusters as probes for cosmology and dark matter1 Elia S. Battistelli1, Carlo Burigana2;3;4, Paolo de Bernardis1, Alexander A. Kirillov5, Gastao B. Lima Neto6, Silvia Masi1, Hans U. Norgaard-Nielsen7, Peter Ostermann8, Matthieu Roman9, Piero Rosati3, Mariachiara Rossetti10;11 Received ; accepted 1Dipartimento di Fisica, Sapienza Universit`adi Roma, P.le Aldo Moro 5, I-00185, Rome, Italy {
[email protected] 2INAF-IASF Bologna, Via Piero Gobetti 101, I-40129 Bologna, Italy 3Dipartimento di Fisica e Scienze della Terra, Universit`adegli Studi di Ferrara,Via Giuseppe Saragat 1, I-44122 Ferrara, Italy 4INFN, Sezione di Bologna, Via Irnerio 46, I-40126, Bologna, Italy 5Dubna International University of Nature, Society and Man, Dubna, 141980, Russia 6Departamento de Astronomia, IAG/USP, S~aoPaulo/SP, 05508-090, Brazil 7DTU Space, Elektrovej, DK - 2800 Kgs. Lyngby, Denmark arXiv:1609.01110v2 [astro-ph.CO] 1 Feb 2018 8independent-research.org, Munich, Germany 9Laboratoire de Physique Nucl´eaireet des Hautes Energies´ (LPNHE),Universit´ePierre et Marie Curie, Paris, France 10Dipartimento di Fisica, Universit`adegli Studi di Milano, Via Celoria 16, I-20133, Milan, Italy 11INAF - IASF Milano, via Bassini 15, I-20133 Milano { 2 { ABSTRACT In recent years, significant progress has been made in building new galaxy clusters samples, at low and high redshifts, from wide-area surveys, particularly exploiting the Sunyaev{Zel'dovich (SZ) effect. A large effort is underway to identify and characterize these new systems with optical/NIR and X-ray facil- ities, thus opening new avenues to constraint cosmological models using struc- ture growth and geometrical tests. A census of galaxy clusters sets constraints on reionization mechanisms and epochs, which need to be reconciled with re- cent limits on the reionization optical depth from cosmic microwave background (CMB) experiments.