Cosmology with X-ray Cluster Baryons
arXiv:astro-ph/0606602 · doi:10.1088/1475-7516/2007/04/004
Abstract
X-ray cluster measurements interpreted with a universal baryon/gas mass fraction can theoretically serve as a cosmological distance probe. We examine issues of cosmological sensitivity for current (e.g. Chandra X-ray Observatory, XMM-Newton) and next generation (e.g. Con-X, XEUS) observations, along with systematic uncertainties and biases. To give competitive next generation constraints on dark energy, we find that systematics will need to be controlled to better than 1% and any evolution in f_gas (and other cluster gas properties) must be calibrated so the residual uncertainty is weaker than (1+z)^{0.03}.
6 pages, 5 figures; v2: 13 pages, substantial elaboration and reordering, matches JCAP version
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