Results 41 to 50 of about 42,790 (257)

KiDS-1000 methodology: Modelling and inference for joint weak gravitational lensing and spectroscopic galaxy clustering analysis [PDF]

Astronomy & Astrophysics, 2020
We present the methodology for a joint cosmological analysis of weak gravitational lensing from the fourth data release of the ESO Kilo-Degree Survey (KiDS-1000) and galaxy clustering from the partially overlapping Baryon Oscillation Spectroscopic Survey
B. Joachimi, C.-A. Lin, M. Asgari, T. Troster, C. Heymans, H. Hildebrandt, F. Kohlinger, A. S'anchez, A. Wright, Maciej Bilicki, C. Blake, J. L. V. D. Busch, M. Crocce, A. Dvornik, T. Erben, Fedor I. Getman, B. Giblin, H. Hoekstra, A. Kannawadi, K. Kuijken, N. Napolitano, P. Schneider, R. Scoccimarro, E. Sellentin, H. Shan, M. V. Wietersheim-Kramsta, J. Zuntz   +26 more
semanticscholar   +1 more source

Simulations of weak gravitational lensing [PDF]

Astroparticle Physics, 2004
15 pages, 9 figures, Astroparticle Physics in ...
White, Martin, Vale, Chris
openaire   +2 more sources

Optimizing tomography for weak gravitational lensing surveys [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT The subject of this paper is optimization of weak lensing tomography: we carry out numerical minimization of a measure of total statistical error as a function of the redshifts of the tomographic bin edges by means of a Nelder–Mead algorithm in order to optimize the sensitivity of weak lensing with respect to different ...
Marvin Sipp, Björn Malte Schäfer, Robert Reischke   +2 more
openaire   +2 more sources

KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing [PDF]

, 2016
We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450deg$^2$ of imaging data from the Kilo Degree Survey (KiDS).
H. Hildebrandt, M. Viola, C. Heymans, S. Joudaki, K. Kuijken, C. Blake, T. Erben, B. Joachimi, D. Klaes, L. Miller, C. Morrison, R. Nakajima, G. Kleijn, A. Amon, A. Choi, G. Covone, J. D. Jong, A. Dvornik, I. F. Conti, A. Grado, J. Harnois-Déraps, R. Herbonnet, H. Hoekstra, F. Kohlinger, J. McFarland, A. Mead, J. Merten, N. Napolitano, J. Peacock, M. Radovich, P. Schneider, P. Simon, E. Valentijn, J. L. V. D. Busch, E. V. Uitert, L. Waerbeke   +35 more
semanticscholar   +1 more source

KiDS-1000 catalogue: Weak gravitational lensing shear measurements [PDF]

Astronomy & Astrophysics, 2020
We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square degrees of deep and high-resolution imaging.
B. Giblin, C. Heymans, M. Asgari, H. Hildebrandt, H. Hoekstra, B. Joachimi, A. Kannawadi, K. Kuijken, Chieh-An Lin, L. Miller, T. Troster, J. L. V. D. Busch, A. Wright, Maciej Bilicki, C. Blake, J. D. Jong, A. Dvornik, T. Erben, Fedor I. Getman, N. Napolitano, P. Schneider, H. Shan   +21 more
semanticscholar   +1 more source

Weak Gravitational Lensing by Galaxies [PDF]

The Astrophysical Journal, 1996
We report a detection of weak, tangential distortion of the images of cosmologically distant, faint galaxies due to gravitational lensing by foreground galaxies. A mean image polarization of ({ital p})=0.011{plus_minus}0.006 (95{percent} confidence bounds) is obtained for 3202 pairs of source (23{lt}{ital r}{sub {ital s}}{le}24) and lens (20{le}{ital r}
Brainerd, Tereasa G., Blandford, Roger D., Smail, Ian   +2 more
openaire   +2 more sources

Gravitational lensing phenomena of Ellis-Bronnikov-Morris-Thorne wormhole with global monopole and cosmic string [PDF]

Physics Letters B
In this paper, we theoretically investigate gravitational lensing within the space-time framework of traversable wormholes, focusing on the combined effects of a global monopole and a cosmic string.
Faizuddin Ahmed, I. Sakallı, A. Al-Badawi   +2 more
semanticscholar   +1 more source

Particle Motion and Plasma Effects on Gravitational Weak Lensing in Lorentzian Wormhole Spacetime

Galaxies, 2021
Here we study particle motion in the specific Lorentzian wormhole spacetime characterized, in addition to the total mass M, with the dimensionless parameter λ.
Farruh Atamurotov, S. Shaymatov, B. Ahmedov   +2 more
semanticscholar   +1 more source

Probing satellite haloes with weak gravitational lensing [PDF]

Monthly Notices of the Royal Astronomical Society, 2012
We demonstrate the possibility of detecting tidal stripping of dark matter subhalos within galaxy groups using weak gravitational lensing. We have run ray-tracing simulations on galaxy catalogues from the Millennium Simulation to generate mock shape catalogues. The ray-tracing catalogues assume a halo model for galaxies and groups, using various models
Gillis, Bryan R., Hudson, Michael J., Hilbert, Stefan, Hartlap, Jan   +3 more
openaire   +2 more sources

Light deflection and gravitational lensing effects inspired by loop quantum gravity [PDF]

Journal of Cosmology and Astroparticle Physics
In the present work, we theoretically investigate light deflection in the weak and strong field regimes for two regular spacetimes with corrections from loop quantum gravity.
A. R. Soares, C. Pereira, R. Vitória, M. Silva, H. Belich   +4 more
semanticscholar   +1 more source