Results 121 to 130 of about 68,770 (225)

Unified Weak Lensing Constraints on the Evolution of the Mass–X-Ray Luminosity Relation for Galaxy Clusters

The Astrophysical Journal
Scaling relations between galaxy cluster properties are crucial for understanding cosmology and baryonic physics. Rigorous calibration of the M – L _X relation, employing weak lensing mass and consistent statistical methodology, is challenging due to ...
I. Pederneiras, A. Finoguenov, E. Cypriano, J. Comparat, K. Kiiveri, L. van Waerbeke, R. Dupke   +6 more
doaj   +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

Testing gravitational physics by combining DESI DR1 and weak lensing datasets using the E_G estimator

The Open Journal of Astrophysics
The action of gravitational physics across space-time creates observable signatures in the behaviour of light and matter. We perform combined-probe studies using data from the Baryon Oscillation Spectroscopic Survey (BOSS) and Dark Energy Spectroscopic ...
S. J. Rauhut, Chris Blake, U. Andrade, H. E. Noriega, J. Aguilar, S. Ahlen, S. BenZvi, D. Bianchi, D. Brooks, T. Claybaugh, A. Cuceu, A. de la Macorra, J. DeRose, P. Doel, N. Emas, S. Ferraro, J. E. Forero-Romero, C. Garcia-Quintero, E. Gaztañaga, G. Gutierrez, S. Heydenreich, K. Honscheid, C. Howlett, D. Huterer, M. Ishak, S. Joudaki, R. Joyce, E. Jullo, R. Kehoe, D. Kirkby, A. Kremin, A. Krolewski, O. Lahav, A. Lambert, C. Lamman, M. Landriau, J. U. Lange, L. Le Guillou, A. Leauthaud, M. Manera, A. Meisner, R. Miquel, S. Nadathur, J. A. Newman, G. Niz, N. Palanque-Delabrouille, W. J. Percival, A. Porredon, F. Prada, I. Pérez-Ràfols, G. Rossi, R. Ruggeri, E. Sanchez, C. Saulder, D. Schlegel, A. Semenaite, J. Silber, D. Sprayberry, Z. Sun, G. Tarlé, B. A. Weaver, P. Zarrouk, R. Zhou, H. Zou   +63 more
doaj   +1 more source

Weak gravitational lensing cross-correlations

, 2017
The matter content of the Universe is dominated by dark matter. Beyond its abundance and its lack of non-gravitational interactions with standard model matter, little is known about the nature of dark matter. This thesis attempts to illuminate different aspects of dark matter by using gravitational lensing in conjunction with other cosmological probes.
openaire   +1 more source

Ellipticities of Galaxy Cluster Halos from Halo–Shear–Shear Correlations

The Astrophysical Journal
We report the first detection of the halo ellipticities of galaxy clusters by applying the halo–shear–shear correlations (HSSCs), without the necessity of using major axis determination.
Zhenjie Liu, Jun Zhang, Cong Liu, Hekun Li   +3 more
doaj   +1 more source

Dark Matter Halos of Luminous Active Galactic Nuclei from Galaxy–Galaxy Lensing with the HSC Subaru Strategic Program

The Astrophysical Journal
We assess the dark matter halo masses of luminous active galactic nuclei (AGNs) over the redshift range 0.2–1.2 using galaxy–galaxy lensing based on imaging data from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP).
Wentao Luo, John D. Silverman, Surhud More, Andy Goulding, Hironao Miyatake, Takahiro Nishimichi, Chiaki Hikage, Lalitwadee Kawinwanichakij, Junyao Li, Qinxun Li, Xiangchong Li, Elinor Medezinski, Masamune Oguri, Taira Oogi, Cristobal Sifon   +14 more
doaj   +1 more source

Forecast of Joint Analysis of Cosmic Shear and Supernovae Magnification from the CSST and LSST

The Astrophysical Journal
Cosmic shear and cosmic magnification reflect the same gravitational lensing field. Each of these two probes are affected by different systematics. We study the auto- and cross-correlations of cosmic shear from the China Space Survey Telescope and cosmic
Ye Cao, Bin Hu, Ji Yao, Hu Zhan
doaj   +1 more source

Weak gravitational lensing with SKA

, 1999
I shall outline the basic principles and some observational aspects of weak gravitational lensing, and discuss several applications of this powerful tool in observational cosmology. It will be explained why the applications have been restricted to optical observations up to now, and why SKA is going to change this. I conclude with a few general remarks
openaire   +2 more sources

Weak Lensing Analysis of A2390 Using Short Exposures

The Astrophysical Journal
We present a weak lensing analysis of the galaxy cluster A2390 at z = 0.23 using second moment shape measurements made in 411 short 60 s exposures. The exposures are obtained in three broadband photometric filters ( g , r , and i ) using WIYN-ODI.
A. Dutta, J. R. Peterson, T. Rose, M. Cianfaglione, A. Bonafede, G. Li, G. Sembroski   +6 more
doaj   +1 more source

Investigating the effects of gravitational lensing by Hu-Sawicki $$\varvec{f(R)}$$ f ( R ) gravity black holes

European Physical Journal C: Particles and Fields
In this work, gravitational lensing in the weak and strong field limits is investigated for black hole spacetime within the framework of Hu–Sawicki f(R) gravity. We employ the Ishihara et al.
Gayatri Mohan, Nashiba Parbin, Umananda Dev Goswami   +2 more
doaj   +1 more source