Weighing the Universe with Photometric Redshift Surveys and the Impact on Dark Energy Forecasts

Details Weighing the Universe with Photometric Redshift Surveys and the Impact on Dark Energy Forecasts Weighing the Universe with Photometric Redshift Surveys and the Impact on Dark Energy Forecasts

2006-05-21

arxiv.org/abs/astro-ph/0605536v1

Astrophys.J.652:857-863,2006

Astronomy and Astrophysics

Astrophysics

6 pages, submitted to ApJ

Scientific paper

10.1086/508605

With a wariness of Occam's razor awakened by the discovery of cosmic acceleration, we abandon the usual assumption of zero mean curvature and ask how well it can be determined by planned surveys. We also explore the impact of uncertain mean curvature on forecasts for the performance of planned dark energy probes. We find that weak lensing and photometric baryon acoustic oscillation data, in combination with CMB data, can determine the mean curvature well enough that the residual uncertainty does not degrade constraints on dark energy. We also find that determinations of curvature are highly tolerant of photometric redshift errors.

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