Results 91 to 100 of about 1,077 (214)

Weak lensing power spectra for precision cosmology : Multiple-deflection, reduced shear, and lensing bias corrections [PDF]

, 2010
It is usually assumed that the ellipticity power spectrum measured in weak lensing observations can be expressed as an integral over the underlying matter power spectrum. This is true at order O(Φ^2) in the gravitational potential.
Krause, E., C. M. Hirata, E. Krause, Hirata, C. M.   +3 more
core   +1 more source

Effect of Unstable Water Flow on Grain Transport: Insights From Laboratory Experiments Under Reduced Atmospheric Pressure

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Nowadays, Mars presents an environment characterized by low atmospheric pressure (∼6 mbar), which profoundly alters water‐driven surface processes known from Earth. Under these conditions, water rapidly boils, cools, and stabilizes near the triple point, often freezing, which strongly limits its ability to transport sediment.
Ondřej Krýza, Petr Brož, Věra Pěnkavová, Jaromír Havlica, Mária Zedníková, Zoe Emerland, Manish Patel, Matthew Sylvest   +7 more
wiley   +1 more source

Galaxy-Galaxy weak gravitational lensing in cluster environment

, 2012
An investigation was carried out into the phenomenon of galaxy-galaxy weak lensing in a sample of 10 X-ray selected galaxy clusters. Using high resolution Hubble Space Telescope imaging data and mathematical techniques described within, the feasibility ...
James, Timothy, John
core  

Precision Cosmology with Weak Gravitational Lensing [PDF]

, 2012
In recent years, cosmological science has developed a highly predictive model for the universe on large scales that is in quantitative agreement with a wide range of astronomical observations.
Hearin, Andrew
core  

Probabilistic Cosmological Mass Mapping from Weak Lensing Shear

, 2017
We infer gravitational lensing shear and convergence fields from galaxy ellipticity catalogs under a spatial process prior for the lensing potential. We demonstrate the performance of our algorithm with simulated Gaussian-distributed cosmological lensing
M. D. Schneider, Ng, KY, Dawson, WA, Bard, DJ, D. J. Bard, Schneider, MD, P. J. Marshall, W. A. Dawson, K. Y. Ng, J. E. Meyers, Marshall, PJ, Meyers, JE   +11 more
core   +1 more source

Weak Shear Study of Galaxy Clusters by Simulated Gravitational Lensing

, 2010
Gravitational lensing has been simulated for numerical galaxy clusters in order to characterize the effects of substructure and shape variations of dark matter halos on the weak lensing properties of clusters.
Coss, David Raymond, Coss, David
core  

Kinematic effect in gravitational lensing by clusters of galaxies [PDF]

, 2007
Gravitational lensing provides an efficient tool for the investigation of matter structures, independent of the dynamical or the hydrostatic equilibrium properties of the deflecting system. However, it depends on the kinematic status.
Sereno, M
core   +1 more source

A New Method for PSF correction using the Ellipticity of Re-smeared Artificial Images in Weak Gravitational Lensing Shear Analysis

The Astrophysical Journal, 2014
We propose a new method for Point Spread Function (PSF) correction in weak gravitational lensing shear analysis using an artificial image with the same ellipticity as the lensed image. This avoids the systematic error associated with the approximation in PSF correction used in previous approaches.
Okura, Yuki, Futamase, Toshifumi
openaire   +3 more sources

Weak Gravitational Lensing around Low Surface Brightness Galaxies in the DES Year 3 Data

The Open Journal of Astrophysics
We present galaxy-galaxy lensing measurements using a sample of low surface brightness galaxies (LSBGs) drawn from the Dark Energy Survey Year 3 (Y3) data as lenses.
N. Chicoine, J. Prat, G. Zacharegkas, C. Chang, D. Tanoglidis, A. Drlica-Wagner, D. Anbajagane, S. Adhikari, A. Amon, R. H. Wechsler, A. Alarcon, K. Bechtol, M. R. Becker, G. M. Bernstein, A. Campos, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, R. Chen, A. Choi, J. Cordero, C. Davis, J. DeRose, S. Dodelson, C. Doux, K. Eckert, J. Elvin-Poole, S. Everett, A. Ferté, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, I. Harrison, K. Herner, M. Jarvis, P. -F. Leget, N. MacCrann, J. McCullough, J. Myles, A. Navarro-Alsina, S. Pandey, M. Raveri, R. P. Rollins, A. Roodman, A. J. Ross, E. S. Rykoff, C. Sánchez, L. F. Secco, I. Sevilla-Noarbe, E. Sheldon, T. Shin, M. A. Troxel, I. Tutusaus, T. N. Varga, B. Yanny, B. Yin, J. Zuntz, M. Aguena, O. Alves, D. Bacon, D. Brooks, J. Carretero, F. J. Castander, C. Conselice, S. Desai, J. De Vicente, P. Doel, I. Ferrero, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, S. Lee, C. Lidman, M. Lima, J. L. Marshall, J. Mena-Fernández, R. Miquel, J. Muir, R. L. C. Ogando, A. Palmese, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, A. Porredon, A. R. Walker, S. Samuroff, E. Sanchez, D. Sanchez Cid, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To, D. L. Tucker, V. Vikram, N. Weaverdyck, P. Wiseman   +104 more
doaj   +1 more source

Exploring Joint Observation of the CSST Shear and Clustering of Astrophysical Gravitational Wave Source Measurements

The Astrophysical Journal
We present a comprehensive forecast for cosmological constraints using the joint observation of the cosmic shear signal from the Chinese Space Station Survey Telescope (CSST) and the clustering signal from the next-generation gravitational wave (GW ...
Pengfei Su, Yan Gong, Qi Xiong, Dingao Hu, Hengjie Lin, Furen Deng, Xuelei Chen   +6 more
doaj   +1 more source