搜索结果: 1-11 共查到“天体物理学 weak lensing”相关记录11条 . 查询时间(0.093 秒)
Future constraints on variations of the fine structure constant from combined CMB and weak lensing measurements
Future constraints variations fine structure constant combined CMB weak lensing measurements
font style='font-size:12px;'>
2012/2/21
We forecast the ability of future CMB and galaxy lensing surveys to constrain variations of the fine structure constant. We found that lensing data, as those expected from satellite experiments as Euc...
Subaru weak-lensing study of A2163: bimodal mass structure
Subaru weak-lensing study A2163 bimodal mass structure
font style='font-size:12px;'>
2011/8/24
We present a weak-lensing analysis of the merging cluster A2163 using Subaru/Suprime-Cam and CHFT/Mega-Cam data and discuss the dynamics of this cluster merger, based on complementary weak-lensing, X-...
Measuring primordial non-Gaussianity through weak lensing peak counts
Measuring primordial non-Gaussianity weak lensing peak counts
font style='font-size:12px;'>
2011/1/11
We explore the possibility of detecting primordial non-Gaussianity of the local type using weak lensing peak counts. We measure the peak abundance in sets of simulated weak lensing maps corresponding ...
On the Accuracy of Weak Lensing Cluster Mass Reconstructions
galaxies clusters general— gravitational lensing
font style='font-size:12px;'>
2010/11/11
We study the bias and scatter in mass measurements of galaxy clusters resulting from fitting sphericallysymmetric Navarro, Frenk & White (NFW) model to the reduced tangential shear profile measured in...
Effects of large-scale structure on the accuracy of weak lensing mass measurements
cosmology observations dark matter large-scale structure of Uni-verse galaxies clusters
font style='font-size:12px;'>
2010/11/10
Weak gravitational lensing has become an important method to determine the masses of galaxy clusters. The intrinsic shapes of the galaxies are a dominant source of uncertainty, but there are other lim...
SUNGLASS: A new weak lensing simulation pipeline
Gravitational lensing Cosmology large scale structure of Universe Methods N-Body simulations
font style='font-size:12px;'>
2010/11/11
A new cosmic shear analysis pipeline SUNGLASS (Simulated UNiverses for Gravitational Lensing Analysis and Shear Surveys) is introduced. SUNGLASS is a pipeline that rapidly generates simulated universe...
Complementarity of Weak Lensing and Peculiar Velocity Measurements in Testing General Relativity
Complementarity of Weak Lensing Peculiar Velocity Measurements General Relativity
font style='font-size:12px;'>
2010/11/12
We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to
better constrain modifications to General Relativity. We find no evidence for deviations from GR on cosmolo...
Accurate Modeling of Weak Lensing with the sGL Method
Accurate Modeling of Weak sGL Method
font style='font-size:12px;'>
2010/11/10
We revise and extend the stochastic approach to cumulative weak lensing (hereafter the sGL
method) rst introduced in Ref. [1]. Here we include a realistic halo mass function and density pro les to m...
Towards Precision LSST Weak-Lensing Measurement - I: Impacts of Atmospheric Turbulence and Optical Aberration
Astronomical Instrumentation gravitational lensing dark matter cosmology
font style='font-size:12px;'>
2010/11/12
The weak-lensing science of the Large Synoptic Survey Telescope (LSST)project drives the need to carefully model and separate the instrumental arti-facts from the intrinsic shear signal caused by grav...
Combining cluster observables and stacked weak lensing to probe dark energy: Self-calibration of systematic uncertainties
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
font style='font-size:12px;'>
2010/12/24
We develop a new method of combining cluster observables (number counts and cluster-cluster correlation functions) and stacked weak lensing signals of background galaxy shapes, both of which are avail...
Elliptical Weighted HOLICs for Weak Lensing Shear Measurement. part1:Definitions and isotropic PSF correction
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
font style='font-size:12px;'>
2010/12/23
We develop a new method to estimate gravitational shear by adopting an elliptical weight function to measure background galaxy images. In doing so, we introduce a new concept of "zero plane" which is ...