AAS 205th Meeting, 9-13 January 2005
Session 108 LSST
Poster, Wednesday, January 12, 2005, 9:20am-6:30pm, Exhibit Hall

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[108.16] Dark Energy Constraints from Lensing Tomography with LSST

M. Takada (Tohoku U.), G. Bernstein (U Penn), W. Hu, D. Huterer (U Chicago), B. Jain (U Penn), L. Knox, T. Tyson, D. Wittman (UC Davis)

We estimate the dark energy constraints achievable with a weak lensing survey that could be carried out with the Large Synoptic Survey Telescope. The technique used in our forecasts is lensing tomography with the auto and cross power spectra of the lensing shear. The power spectra depend on the growth function and angular diameter distances, which are both sensitive to the equation of state of dark energy. We include the effect of statistical and some systematic errors in our parameter forecasts for LSST. We identify the limiting systematics in being able to achieve the precision possible with a survey that covers a large fraction of the sky. In this study we use only the simplest lensing statistics; the constraints can be improved by using other complementary measures from the same dataset.

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© 2004. The American Astronomical Society.