Bayesian model selection for dark energy using weak lensing forecasts
نویسندگان
چکیده
منابع مشابه
Weak lensing and dark energy
We study the power of upcoming weak lensing surveys to probe dark energy. Dark energy modifies the distance-redshift relation as well as the matter power spectrum, both of which affect the weak lensing convergence power spectrum. Some dark-energy models predict additional clustering on very large scales, but this probably cannot be detected by weak lensing alone due to cosmic variance. With rea...
متن کاملWeak lensing, dark matter and dark energy
Weak gravitational lensing is rapidly becoming one of the principal probes of dark matter and dark energy in the universe. In this brief review we outline how weak lensing helps determine the structure of dark matter halos, measure the expansion rate of the universe, and distinguish between modified gravity and dark energy explanations for the acceleration of the universe. We also discuss requi...
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I hereby present two different methods that will allow weak lensing shape measurements of galaxies combined with redshift information – 3D weak lensing – to constrain the dark energy equation of state. The two methods are the geometric ratio test (Taylor et al. 2007) and a shear harmonic test (Heavens et al. 2006). The results presented here use a Fisher matrix approach for each method to place...
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Weak gravitational lensing of distant galaxies by foreground structures has proven to be a powerful tool to study the mass distribution in the universe. The advent of panoramic cameras on 4m class telescope has led to a first generation of surveys that already compete with large redshift surveys in terms of the accuracy with which cosmological parameters can be determined. The next surveys, whi...
متن کاملDark Energy Constraints from Weak Lensing Cross-correlation Cosmography
We present a method to implement the idea of Jain & Taylor (2003) to constrain cosmological parameters with weak gravitational lensing. Photometric redshift information on foreground galaxies is used to produce templates of the mass structure at foreground slices zl, and the predicted distortion field is cross-correlated with the measured shapes of sources at redshift zs. The variation of the c...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2013
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stt1954