Results 51 to 60 of about 11,925 (196)

Computer Programming to Advance Gravitational Lensing [PDF]

, 2013
The purpose of this research was to create a computer code that would numerically test a Poisson equation relating the mass distribution of a lens galaxy cluster to weak gravitational shear.
Roche, Alex
core   +1 more source

Mathematics of Gravitational Lensing: Multiple Imaging and Magnification

, 2009
The mathematical theory of gravitational lensing has revealed many generic and global properties. Beginning with multiple imaging, we review Morse-theoretic image counting formulas and lower bound results, and complex-algebraic upper bounds in the case ...
A. Majthay, A. O. Petters, A. Zakharov, A.B. Aazami, A.B. Aazami, A.O. Petters, A.O. Petters, A.O. Petters, A.O. Petters, A.O. Petters, A.O. Petters, A.O. Petters, C. Hunter, C. Keeton, C. Keeton, D. Castrigiano, D. Khavinson, D. Narasimha, D.H. Gottlieb, E.M. Shin, F. Giannoni, F. Giannoni, G.W. Gibbons, G.W. Gibbons, G.W. Gibbons, G.W. Gibbons, H. Friedrich, H. Witt, H.J. Witt, H.J. Witt, I. Kovner, J. Bayer, J. Ehlers, J. Granot, J. Milnor, J. Renn, J. Wambsganss, J.M. Azais, K. Subramanian, M. C. Werner, M. Chiba, M. Golubitsky, M. Shub, M. Sodin, M. Sodin, M. Sodin, M.A. Abramowicz, M.C. Werner, M.C. Werner, M.F. Atiyah, M.F. Atiyah, N. Dalal, N. Dalal, N. Katz, N.W. Evans, N.W. Evans, P. Griffiths, P. Schneider, P. Schneider, P. Schneider, P.J. Forrester, P.L. Schechter, R. Adler, R. Blandford, R. Gilmore, R. Low, R. Nityananda, R.B. Metcalf, R.D. Blandford, R.H. McKenzie, S. Mao, S. Mao, S.H. Rhie, T. Frankel, T. Padmanabhan, T. Poston, V. Perlick, V. Perlick, V. Perlick, V. Perlick, V. Perlick, V. Perlick, V.I. Arnold, V.I. Arnold, V.I. Arnold, V.I. Arnold, W. Burke, W.V. Li   +87 more
core   +1 more source

THE SYSTEMATIC ERROR TEST FOR PSF CORRECTION IN WEAK GRAVITATIONAL LENSING SHEAR MEASUREMENT BY THE ERA METHOD BY IDEALIZING PSF [PDF]

The Astrophysical Journal, 2016
ABSTRACT We improve the ellipticity of re-smeared artificial image (ERA) method of point-spread function (PSF) correction in a weak lensing shear analysis in order to treat the realistic shape of galaxies and the PSF. This is done by re-smearing the PSF and the observed galaxy image using a re-smearing function (RSF) and allows us to use
Okura, Yuki, Futamase, Toshifumi
openaire   +2 more sources

The scale matters: A review on stimuli‐responsive microrobots categorized by scale for biomedical applications

Responsive Materials, EarlyView.
We systematically summarize how each scale dictates fundamental choices in design feature, manufacturing technology, driving mechanism, and control strategy, which are inherently governed by scale‐dominated physical principles. Furthermore, the application of scale‐determined operation modes of microrobots across different stages of medical ...
Hang Yin, Yujing Li, Guanghao Wu, Yubing Guo   +3 more
wiley   +1 more source

Precision Measurement of Large Shear Signals

The Astrophysical Journal Letters
So far, estimators of galaxy shape distortions are only carefully studied perturbatively in the case of small shear signals, mainly for weak-lensing science.
Jiarui Sun, Jun Zhang, Li Cui, Alessandro Sonnenfeld, Xin Wang   +4 more
doaj   +1 more source

Full-sky ray-tracing simulation of weak lensing using ELUCID simulations: exploring galaxy intrinsic alignment and cosmic shear correlations

, 2018
The intrinsic alignment of galaxies is an important systematic effect in weak-lensing surveys, which can affect the derived cosmological parameters. One direct way to distinguish different alignment models and quantify their effects on the measurement is
Cui, Weiguang, Jing, Yipeng, Kang, Xi, Li, Guoliang, Li, Shijie, Lim, S. H., Lin, Weipeng, Lu, Yi, Luo, Yu, Mo, Houjun, Tweed, Dylan, Wang, Huiyuan, Wang, Peng, Wang, Yang, Wei, Chengliang, Xia, Qianli, Yang, Xiaohu, Zhang, Youcai   +17 more
core   +1 more source

When Thriving for More Collapses the System: The Academic Reproduction of Uncaring Structures

British Journal of Management, EarlyView.
Abstract This essay argues that the widening gap between aspirational aims and visionary orientations and the prevailing practices in neoliberal academia stems from deeper, historically rooted, market‐based logics shaping our institutions, increasingly governed by economic values and academic subjectivities therein.
Lara Pecis, Florian Bauer
wiley   +1 more source

A multi-wavelength study of the gravitational lens COSMOS J095930+023427

, 2012
We present a multi-wavelength study of the gravitational lens COSMOS J095930+023427 (z=0.89), together with the associated galaxy group located at $z\sim0.7$ along the line of sight and the lensed background galaxy.
Cao, Shuo, Covone, Giovanni, Paolillo, Maurizio, Zhu, Zong-Hong   +3 more
core   +1 more source

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

Improving Precision in Kinematic Weak Lensing with MIRoRS: Model-independent Restoration of Reflection Symmetries

The Astrophysical Journal
We present a novel, model-independent technique for fitting the cross-component of weak lensing shear, γ _× , along a line of sight by combining kinematic and photometric measurements of a single lensed galaxy.
Christopher Hopp, David Wittman
doaj   +1 more source