105 citations · 744 across the 49 of their papers we have counts for
27 papers · 1 filter
The influence of plasma lensing magnification to the luminosity function of fast radio bursts
Xinzhong Er, Weishan Zhu, Shude Mao +1
Small scale clumps of ionized gas have been suggested by observations in interstellar medium and circumgalactic medium. The propagation of radio signals can be deflected by these p…
Impact of Large-Scale Structure along Line-of-Sight on Time-Delay Cosmography
Shijie Lin, Bin Hu, Chengliang Wei +4
Time-delay cosmography offers a promising and independent method for measuring cosmological distances by monitoring multiple images of gravitationally lensed sources. However, beyo…
Forecast of strongly lensed supernovae rates in the China Space Station Telescope surveys
Jiang Dong, Yiping Shu, Guoliang Li +3
Strong gravitationally lensed supernovae (SNe) are a powerful probe for cosmology and stellar physics. The relative time delays between lensed SN images provide an independent way…
The chromatic Point Spread Function of weak lensing measurement in Chinese Space Station survey Telescope
Q. Y. Liu, X. Z. Er, Z. H. Fan +6
The weak gravitational lensing is a powerful tool in modern cosmology. To accurately measure the weak lensing signal, one has to control the systematic bias to a small level. One o…
Plasma lensing with magnetic field and a small correction to the Faraday rotation measurement
Xinzhong Er, Ue-Li Pen, Xiaohui Sun +1
Plasma lensing displays interesting characteristics that set it apart from gravitational lensing. The magnetised medium induces birefringence in the two polarisation modes. As the…
Potential scientific synergies in weak lensing studies between the CSST and Euclid space probes
D. Z. Liu, X. M. Meng, X. Z. Er +24
Aims. With the next generation of large surveys coming to the stage of observational cosmology soon, it is important to explore their potential synergies and to maximise their scie…
Forecast of observing time delay of the strongly lensed quasars with Muztagh-Ata 1.93m telescope
Shanhao Zhu, Yiping Shu, Haibo Yuan +8
As a completely independent method, the measurement of time delay of strongly lensed quasars (TDSL) are crucial to resolve the Hubble tension. Extensive monitoring is required but…
Bias in apparent dispersion measure due to de-magnification of plasma lensing on background radio sources
Xinzhong Er, Jiangchuan Yu, Adam Rogers +2
The effect of ionized gas on the propagation of radio signals is known as plasma lensing. Unlike gravitational lensing, plasma lensing causes both magnification and strong de-magni…
Deep Learning for Strong Lensing Search: Tests of the Convolutional Neural Networks and New Candidates from KiDS DR3
Zizhao He, Xinzhong Er, Qian Long +6
Convolutional Neutral Networks have been successfully applied in searching for strong lensing systems, leading to discoveries of new candidates from large surveys. On the other han…
Plasma lensing in comparison to gravitational lensing -- Formalism and degeneracies
Jenny Wagner, Xinzhong Er
Gravitational and plasma lensing share the same mathematical formalism in the limit of geometrical optics. Both phenomena can be effectively described by a projected, two-dimension…
Minkowski Functionals of Convergence Maps and the Lensing Figure of Merit
Martina Vicinanza, Vincenzo F. Cardone, Roberto Maoli +3
Minkowski functionals (MFs) quantify the topological properties of a given field probing its departure from Gaussianity. We investigate their use on lensing convergence maps in ord…
Increasing the Lensing Figure of Merit through Higher Order Convergence Moments
Martina Vicinanza, Vincenzo F. Cardone, Roberto Maoli +2
The unprecedented quality, the increased dataset, and the wide area of ongoing and near future weak lensing surveys allows to move beyond the standard two points statistics thus ma…
Calibration of colour gradient bias in shear measurement using HST/CANDELS data
Xinzhong Er, Henk Hoekstra, Tim Schrabback +6
Accurate shape measurements are essential to infer cosmological parameters from large area weak gravitational lensing studies. The compact diffraction-limited point-spread function…
Improving lensing cluster mass estimate with flexion
Vincenzo F. Cardone, Martina Vicinanza, Xinzhong Er +2
Gravitational lensing has long been considered as a valuable tool to determine the total mass of galaxy clusters. The shear profile as inferred from the statistics of ellipticity o…
Higher order moments of lensing convergence - I. Estimate from simulations
M. Vicinanza, V. F. Cardone, R. Maoli +2
Large area lensing surveys are expected to make it possible to use cosmic shear tomography as a tool to severely constrain cosmological parameters. To this end, one typically relie…
Cosmic tidal reconstruction
Hong-Ming Zhu, Ue-Li Pen, Yu Yu +2
The gravitational coupling of a long-wavelength tidal field with small-scale density fluctuations leads to anisotropic distortions of the locally measured small-scale matter correl…
Measurement of differential magnification
Xinzhong Er
In gravitational lensing, the magnification effect changes the luminosity and size of a background galaxy. If the image sizes are not small compared to the scale over which the mag…
Effects of plasma on gravitational lensing
Xinzhong Er, Shude Mao
We study gravitational lensing when plasma surrounds the lens. An extra deflection angle is induced by the plasma in addition to the deflection generated by gravity. An inhomogeneo…
Biases in physical parameter estimates through differential lensing magnification
Xinzhong Er, Junqiang Ge, Shude Mao
We study the lensing magnification effect on background galaxies. Differential magnification due to different magnifications of different source regions of a galaxy will change the…
Gravitational lensing effects on sub-millimetre galaxy counts
Xinzhong Er, Guoliang Li, Shude Mao +1
We study the effects on the number counts of sub-millimetre galaxies due to gravitational lensing. We explore the effects on the magnification cross section due to halo density pro…
Large Size Scatter of Passively Evolving Lensed Galaxies at z~2 in CLASH
Lulu Fan, Yang Chen, Xinzhong Er +3
In a systematic search over 11 cluster fields from Cluster Lensing And Supernova survey with Hubble (CLASH) we identify ten passively evolving massive galaxies at redshift z~2.We d…
Gravitational lensing properties of isothermal universal halo profile
Xinzhong Er
N-body simulations predict that dark matter halos with different mass scales are described by a universal model, the Navarro-Frenk-White (NFW) density profiles. As a consequence of…
Estimation of halo ellipticity using spin-3 flexion
Xinzhong Er, Matthias Bartelmann
Estimating the ellipticity of dark matter haloes at the galaxy or galaxy-cluster scale can provide important constraints on the formation of galaxies or clusters, as well as on the…
Measurement of halo properties with weak lensing shear and flexion
Xinzhong Er, Ismael Tereno, Shude Mao
We constrain properties of cluster haloes by performing likelihood analysis using lensing shear and flexion data. We test our analysis using two mock cluster haloes: an isothermal…