Cosmological Studies With A Large-Area X-ray Telescope
A.Vikhlinin, S.W.Allen, M.Arnaud, M.Bautz, H.Boehringer, M.Bonamente,, J.Burns, A.Evrard, J.P.Henry, C.Jones, B.R.McNamara, D.Nagai, D.Rapetti,, T.Reiprich

TL;DR
This paper discusses how the International X-ray Observatory can significantly contribute to cosmology by studying high-redshift galaxy clusters, providing precise measurements of dark energy and cosmic acceleration.
Contribution
It introduces the use of IXO observations combined with lensing follow-up as a novel approach to measure cosmological parameters with high accuracy.
Findings
IXO can measure the perturbation growth factor from z=0-2.
IXO observations can improve constraints on dark energy.
The method offers competitive accuracy with SNIa and BAO studies.
Abstract
A moderate investment of observing time with the International X-ray Observatory to study high-redshift galaxy clusters detected in future large-scale surveys, will provide cosmological measurements of fundamental importance. IXO observations, combined with lensing follow-up, will measure the perturbation growth factor from z=0-2 with an accuracy comparable to, or possibly better than, that expected from observations of cosmic shear with JDEM, and redshift-space distortions with EUCLID. The growth of structure data derived from clusters will significantly improve our knowledge of the dark energy equation of state and will aid in constraining non-GR models for cosmic acceleration. IXO observations of the largest, dynamically relaxed clusters will provide a powerful, independent measurement of the cosmological expansion history using the apparent f_gas(z) trend. Systematic and statistical…
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Solar and Space Plasma Dynamics · History and Developments in Astronomy
