Paper: astro-ph/0605536
Date: Sun, 21 May 2006 18:00:59 GMT (43kb)

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

Authors: Lloyd Knox (UC Davis), Yong-Seon Song (U Chicago), Hu Zhan (UC Davis)

Comments: 6 pages, submitted to ApJ
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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.

\\ ( http://arXiv.org/abs/astro-ph/0605536 , 43kb)

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Paper: astro-ph/0605537
Date: Sun, 21 May 2006 18:41:29 GMT (42kb)

Title: Modeling dark energy with a top-down approach

Authors: Duane A. Dicus and Wayne W. Repko

Comments: 6 pages, 4 figures

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We investigate a top-down approach for modeling the dark energy where we fit
the luminosity distances directly rather than indirectly fitting the equation
of state.

\\ ( http://arXiv.org/abs/astro-ph/0605537 , 42kb)