Weak lensing power spectra for precision cosmology
نویسندگان
چکیده
منابع مشابه
Weak lensing power spectra for precision cosmology
It is usually assumed that the ellipticity power spectrum measured in weak lensing observations can be expressed as an integral over the underlying matter power spectrum. This is true at order O(Φ2) in the gravitational potential. We extend the standard calculation, constructing all corrections to order O(Φ4). There are four types of corrections: corrections to the lensing shear due to multiple...
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We explore the dependence of weak lensing phenomena on the background cosmology. We rst generalise the relation between P (!), the angular power spectrum of the distortion, and the power spectrum of density uctuations to nonat cosmologies. We then compute P for various illustrative models. A useful cosmological discriminator is the growth of P with source redshift which is much stronger in low ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200913524