منابع مشابه
A weak lensing analysis of a STIS dark-lens candidate
We perform a weak lensing analysis on a previously reported dark-lens candidate on STIS Parallel data (?). New VLT-data indicate that the reported signal originates from a small number of galaxies tangentially aligned towards the center of the STIS field but no signature for an extended mass distribution is found. We argue that we should be able to detect a massive cluster (M ≥ 3.2 × 10M ) thro...
متن کاملMapping the dark matter using weak lensing
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 کاملWeak Lensing
In the preceding chapters, the effects of lensing were so strong as to leave an unmistakable imprint on a specific source, allowing a detailed treatment. However, only the densest regions of the universe are able to provide such a spectacular lensing effect. To study more representative regions of the universe, we must examine large numbers of sources statistically. This is the domain of weak l...
متن کاملThe Born and Lens-Lens Corrections to Weak Gravitational Lensing Angular Power Spectra
We revisit the estimation of higher order corrections to the angular power spectra of weak gravitational lensing. Extending a previous calculation of Cooray and Hu, we find two additional terms to the fourth order in potential perturbations of largescale structure corresponding to corrections associated with the Born approximation and the neglect of line-of-sight coupling of two foreground lens...
متن کاملWeak Lensing from Space Ii: Dark Matter Mapping
We study the accuracy with which weak lensing measurements can be made from space, and the subsequent resolution of both 3-dimensional and projected 2-dimensional dark matter maps. As a baseline, we use the instrumental specifications of the Supernova/Acceleration Probe (SNAP) satellite. We compute the sensitivity to shear as a function of depth for space-based observations. Our predictions are...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2001
ISSN: 0004-637X
DOI: 10.1086/324064