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Dark energy constraints and correlations with systematics from CFHTLS weak lensing, SNLS supernovae Ia and WMAP5
M. Kilbinger, K. Benabed, J. Guy +15
We combine measurements of weak gravitational lensing from the CFHTLS-Wide survey, supernovae Ia from CFHT SNLS and CMB anisotropies from WMAP5 to obtain joint constraints on cosmo…
Subaru Weak Lensing survey -- II: Multi-object Spectroscopy and Cluster Masses
Takashi Hamana, Satoshi Miyazaki, Nobunari Kashikawa +4
We present the first results of a MOS campaign to follow up cluster candidates located via weak lensing. Our main goals are to search for spatial concentrations of galaxies that ar…
A note on artificial deformation in object shapes due to the pixelization
Takashi Hamana, Satoshi Miyazaki
We qualitatively examine properties of artificial deformation in shapes of objects (galaxies and stars) induced by the pixelization effects (also called as the aliasing effects) us…
Optimizing future imaging survey of galaxies to confront dark energy and modified gravity models
Kazuhiro Yamamoto, David Parkinson, Takashi Hamana +2
We consider the extent to which future imaging surveys of galaxies can distinguish between dark energy and modified gravity models for the origin of the cosmic acceleration. Dynami…
MOIRCS Deep Survey. II. Clustering Properties of K-band Selected Galaxies in GOODS-North Region
Takashi Ichikawa, Ryuji Suzuki, Chihiro Tokoku +11
We present the first measurement of clustering properties of low mass galaxies with a stellar mass down to M_*~10^9 Msun at 1<z<4 in 24.4 arcmin^2 of the GOODS-North region with a…
Cosmic variance of weak lensing surveys in the non-Gaussian regime
Elisabetta Semboloni, Ludovic van Waerbeke, Catherine Heymans +4
The results from weak gravitational lensing analyses are subject to a cosmic variance error term that has previously been estimated assuming Gaussian statistics. In this letter we…