Cosmology with X-ray Cluster Baryons

Details Cosmology with X-ray Cluster Baryons Cosmology with X-ray Cluster Baryons

2006-06-26

arxiv.org/abs/astro-ph/0606602v2

JCAP 0704:004,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures; v2: 13 pages, substantial elaboration and reordering, matches JCAP version

Scientific paper

10.1088/1475-7516/2007/04/004

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}.

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