Results 21 to 30 of about 677 (118)

An Opacity-free Test of the Cosmic Distance Duality Relation Using Strongly Lensed Gravitational-wave Signals with Space-based Detector Networks

The Astrophysical Journal
The cosmic distance duality relation (CDDR), expressed as d _L ( z ) = (1 +  z ) ^2 D _A ( z ), is a fundamental relation in modern cosmology. In this work, we apply a method to test the CDDR using simulated strongly lensed gravitational-wave (SLGW ...
Yong Yuan, Minghui Du, Benyang Zhu, Xin-Yi Lin, Wen-Fan Feng, Peng Xu, Xilong Fan   +6 more
doaj   +1 more source

Quasar Milli-lensing and Cold Dark Matter (TNG50) Subhaloes. I. Image Splitting

The Astrophysical Journal
We use numerical mass density profiles from the TNG50 simulation to study the impact of gravitational milli-lensing by dark matter subhaloes on the images of lensed quasars.
E. Mediavilla, J. Jiménez-Vicente, F. M. Heinze, J. Martín Camalich   +3 more
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Microlensing timescales and flux magnification probabilities of a sample of 204 lensed quasars

Astronomy & Astrophysics
Context. Quasar microlensing is a very useful tool in cosmology and astrophysics, as well as a source of uncertainty in certain investigations, such as the determination of the Hubble constant from lensed quasars.
Ávila-Vera F., Motta V., Mediavilla E.
doaj   +1 more source

Dynamical Systematics for Time-delay Lenses and the Impact on the Hubble Constant

The Astrophysical Journal
While time-delay lenses can independently probe H _0 , the estimates are degenerate with the convergence of the lens near the Einstein radius. Velocity dispersions, σ , can be used to break the degeneracy, with uncertainties Δ H / H _0  ∝ Δ σ ^2 / σ ^2 ...
R. Forés-Toribio, C. S. Kochanek, J. A. Muñoz   +2 more
doaj   +1 more source

Strong Gravitational-wave Lensing Posterior Odds

The Astrophysical Journal
Like light, gravitational waves are gravitationally lensed by intervening massive astrophysical objects—such as galaxies, clusters, black holes, and stars—resulting in a variety of potentially observable gravitational-wave lensing signatures.
Otto A. Hannuksela, K. Haris, Justin Janquart, Harsh Narola, Hemantakumar Phurailatpam, Jolien D. E. Creighton, Chris Van Den Broeck   +6 more
doaj   +1 more source

Identification of Strongly Lensed Gravitational-wave Events Using Squeeze-and-excitation Multilayer Perceptron Data-efficient Image Transformer

The Astrophysical Journal Supplement Series
With the advancement of third-generation gravitational-wave (GW) detectors, the identification of strongly lensed GW events is expected to play an increasingly vital role in cosmology and fundamental physics.
Dejiang Li, Tonghua Liu, Ao Liu, Cuihong Wen, Jieci Wang, Kai Liao, Jiaxing Cui   +6 more
doaj   +1 more source

Hierarchical Cosmological Constraints through a Strong-lensing Distance Ratio

The Astrophysical Journal Supplement Series
Strong gravitational lensing provides an independent and powerful probe of cosmic expansion by directly linking observables to cosmological distances.
Shuaibo Geng, Shuo Cao, Marek Biesiada, Xinyue Jiang, Yalong Nan, Chenfa Zheng   +5 more
doaj   +1 more source

Witt’s Hyperbola Is Both Predicted and Observed to Pass Close to the Lensing Galaxies in Quadruple Quasars

The Astrophysical Journal
When a rectangular hyperbola is constructed from the image positions of a quadruply lensed quasar, as proposed by Witt, it passes very close to the lensing galaxy. The median measured perpendicular offset between the observed light center of the lens and
Paul L. Schechter, Richard Luhtaru
doaj   +1 more source

Mock Catalogs of Strongly Lensed Gravitational Waves via a Halo Model Approach with Ground-based Detectors

The Astrophysical Journal Supplement Series
As plans for the construction of third-generation gravitational-wave (GW) detectors advance, research into strongly lensed GWs has become increasingly critical. It is anticipated that hundreds of multi-image lensed GWs will be detected annually.
Youkai Li, Kai Liao, Mingqi Sun, Lilan Yang, Xuheng Ding, Marek Biesiada, Tonghua Liu   +6 more
doaj   +1 more source

A Targeted Search for Variable Gravitationally Lensed Quasars

The Astrophysical Journal
We present a pipeline to identify photometric variability within strong gravitationally lensing candidates, in the Dark Energy Spectroscopic Instrument Legacy Imaging Surveys.
William Sheu, Xiaosheng Huang, Aleksandar Cikota, Nao Suzuki, Antonella Palmese, David J. Schlegel, Christopher Storfer   +6 more
doaj   +1 more source