sunglass: a new weak-lensing simulation pipeline
نویسندگان
چکیده
منابع مشابه
A New Measure for Weak Lensing Flexion
We study a possibility to use the octopole moment of gravitationally lensed images as a direct measure of the third-order weak gravitational lensing effect, or the gravitational flexion. It turns out that there is a natural relation between flexion and certain combinations of octopole/higher-multipole moments which we call the Higher Order Lensing Image’s Characteristics (HOLICs). This will all...
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 کاملA New Shear Estimator for Weak Lensing Observations
We present a new shear estimator for weak lensing observations which properly accounts for the effects of a realistic point spread function (PSF). Images of faint galaxies are subject to gravitational shearing followed by smearing with the instrumental and/or atmospheric PSF. We construct a ‘finite resolution shear operator’ which when applied to an observed image has the same effect as a gravi...
متن کاملA New Weak Lensing Analysis of MS1224.7+2007
Galaxy cluster mass distributions are useful probes of Ω0 and the nature of the dark matter. Large clusters will distort the observed shapes of background galaxies through gravitational lensing allowing the measurement of the cluster mass distributions. For most cases, the agreement between weak lensing and radial velocity mass measurements of clusters is reasonably good. There is, however, one...
متن کاملCosmological Simulation of Gravitational Weak Lensing in Open Models
Cosmological simulation of gravitational weak lensing in open models with (Ω0, λ0) = (0.2, 0) and (0.4, 0) is treated using the direct integration method, which is independent of the multi-lens-plane method. Statistical averages of optical quantities (the convergence, shear, and amplification) are derived for ray bundles passing through the clumpy universe, in which the initial state has the CD...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2011
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2011.18540.x