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We have analysed 53 square degrees of imaging data from the Red-Sequence Cluster Survey (RCS), and measured the excess correlations in the shapes of galaxies on scales out to ~1.5 degrees. We separate the signal into an ``E''- (lensing) and…

Astrophysics · Physics 2009-11-07 Henk Hoekstra , Howard Yee , Mike Gladders

We compare the amplitudes of fluctuations probed by the 2dF Galaxy Redshift Survey and by the latest measurements of the Cosmic Microwave Background anisotropies. By combining the 2dFGRS and CMB data we find the linear-theory rms mass…

We present a concept study on weak lensing map reconstruction through the cosmic magnification effect in galaxy number density distribution. We propose a minimal variance linear estimator to minimize both the dominant systematical and…

Cosmology and Nongalactic Astrophysics · Physics 2012-02-16 Xinjuan Yang , Pengjie Zhang

We present the first detection of weak gravitational lensing around spectroscopically confirmed dwarf galaxies, using the large overlap between DESI DR1 spectroscopic data and DECADE/DES weak lensing catalogs. A clean dwarf galaxy sample…

We present a weak gravitational lensing analysis of 22 early-type strong lens galaxies, based on deep HST images obtained as part of the Sloan Lens ACS Survey. Using the most advanced techniques to control systematic uncertainties related…

A convincing detection of primordial non-Gaussianity in the local form of the bispectrum, whose amplitude is given by the fNL parameter, offers a powerful test of inflation. In this paper we calculate the modification of two-point…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Donghui Jeong , Eiichiro Komatsu , Bhuvnesh Jain

We present the first step toward deriving cosmological constraints through the abundances of galaxy clusters selected in a $510\,\mathrm{deg}^2$ weak-lensing aperture mass map, constructed with the Year-Three shear catalog from the Hyper…

We propose counting peaks in weak lensing (WL) maps, as a function of their height, to probe models of dark energy and to constrain cosmological parameters. Because peaks can be identified in two-dimensional WL maps directly, they can…

Cosmology and Nongalactic Astrophysics · Physics 2010-04-06 Jan M. Kratochvil , Zoltán Haiman , Morgan May

Cross-correlation between weak lensing of the Cosmic Microwave Background (CMB) and weak lensing of galaxies offers a way to place robust constraints on cosmological and astrophysical parameters with reduced sensitivity to certain…

Cosmology and Nongalactic Astrophysics · Physics 2024-09-17 S. Shaikh , I. Harrison , A. van Engelen , G. A. Marques , T. M. C. Abbott , M. Aguena , O. Alves , A. Amon , R. An , D. Bacon , N. Battaglia , M. R. Becker , G. M. Bernstein , E. Bertin , J. Blazek , J. R. Bond , D. Brooks , D. L. Burke , E. Calabrese , A. Carnero Rosell , J. Carretero , R. Cawthon , C. Chang , R. Chen , A. Choi , S. K. Choi , L. N. da Costa , M. E. S. Pereira , O. Darwish , T. M. Davis , S. Desai , M. Devlin , H. T. Diehl , P. Doel , C. Doux , J. Elvin-Poole , G. S. Farren , S. Ferraro , I. Ferrero , A. Ferté , B. Flaugher , J. Frieman , M. Gatti , G. Giannini , S. Giardiello , D. Gruen , R. A. Gruendl , G. Gutierrez , J. C. Hill , S. R. Hinton , D. L. Hollowood , K. Honscheid , K. M. Huffenberger , D. Huterer , D. J. James , M. Jarvis , N. Jeffrey , H. T. Jense , K. Knowles , J. Kim , D. Kramer , O. Lahav , S. Lee , M. Lima , N. MacCrann , M. S. Madhavacheril , J. L. Marshall , J. McCullough , Y. Mehta , J. Mena-Fernández , R. Miquel , J. J. Mohr , K. Moodley , J. Myles , A. Navarro-Alsina , L. Newburgh , M. D. Niemack , Y. Omori , S. Pandey , B. Partridge , A. Pieres , A. A. Plazas Malagón , A. Porredon , J. Prat , F. J. Qu , N. Robertson , R. P. Rollins , A. Roodman , S. Samuroff , C. Sánchez , E. Sanchez , D. Sanchez Cid , L. F. Secco , N. Sehgal , E. Sheldon , B. D. Sherwin , T. Shin , C. Sifón M. Smith , E. Suchyta , M. E. C. Swanson , G. Tarle , M. A. Troxel , I. Tutusaus , C. Vargas , N. Weaverdyck , P. Wiseman , M. Yamamoto , J. Zuntz

Weak gravitational lensing of distant galaxies by foreground structures has proven to be a powerful tool to study the mass distribution in the universe. Nowadays, attention has shifted from clusters of galaxies to the statistical properties…

Astrophysics · Physics 2009-11-07 Henk Hoekstra , Howard Yee , Mike Gladders

As recently shown by Viola et al., the common (KSB) method for measuring weak gravitational shear creates a non-linear relation between the measured and the true shear of objects. We investigate here what effect such a non-linear…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Matthias Bartelmann , Massimo Viola , Peter Melchior , Björn M. Schäfer

We present the results of a study of the average mass profile around galaxies using weak gravitational lensing. We use 45.5 deg^2 of R_C band imaging data from the Red-Sequence Cluster Survey (RCS) and define a sample of 1.2\times 10^5…

Astrophysics · Physics 2007-05-23 Henk Hoekstra , Howard K. C. Yee , Michael D. Gladders

The weak gravitational lensing of distant galaxies by large-scale structure is expected to become a powerful probe of dark energy. By measuring the ellipticities of large numbers of background galaxies, the subtle gravitational distortion…

Astrophysics · Physics 2014-11-18 Charles Shapiro

Galaxy clusters are one of the most powerful probes to study extensions of General Relativity and the Standard Cosmological Model. Upcoming surveys like the Vera Rubin Observatory's Legacy Survey of Space and Time are expected to…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-19 Markus Michael Rau , Florian Kéruzoré , Nesar Ramachandra , Lindsey Bleem

We present the first weak gravitational lensing analysis of the completed Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). We study the 64 square degrees W1 field, the largest of the CFHTLS-Wide survey fields, and present the largest…

We present an analysis of galaxy-galaxy weak gravitational lensing (GGL) in chameleon $f(R)$ gravity - a leading candidate of non-standard gravity models. For the analysis we have created mock galaxy catalogues based on dark matter haloes…

Cosmology and Nongalactic Astrophysics · Physics 2017-12-27 Baojiu Li , Masato Shirasaki

Context. Weak lensing and clustering statistics beyond two-point functions can capture non-Gaussian information about the matter density field, thereby improving the constraints on cosmological parameters relative to the mainstream methods…

One of the most powerful cosmological datasets when it comes to constraining neutrino masses is represented by galaxy power spectrum measurements, $P_{gg}(k)$. The constraining power of $P_{gg}(k)$ is however severely limited by…

Cosmology and Nongalactic Astrophysics · Physics 2019-03-18 Elena Giusarma , Sunny Vagnozzi , Shirley Ho , Simone Ferraro , Katherine Freese , Rocky Kamen-Rubio , Kam-Biu Luk

[Abridged] We present a comparison between weak-lensing (WL) and X-ray mass estimates of a sample of numerically simulated clusters. The sample consists on the 20 most massive objects at redshift z=0.25 and Mvir > 5 x 10^{14} Msun h^{-1}.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 E. Rasia , M. Meneghetti , R. Martino , S. Borgani , A. Bonafede , K. Dolag , S. Ettori , D. Fabjan , C. Giocoli , P. Mazzotta , J. Merten , M. Radovich , L. Tornatore
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