Results 41 to 50 of about 95,116 (297)

Detecting and Characterizing Young Quasars. III. The Impact of Gravitational Lensing Magnification

The Astrophysical Journal, 2023
We test the impact of gravitational lensing on the lifetime estimates of seven high-redshift quasars at redshift z ≳ 6. The targeted quasars are identified by their small observed proximity zone sizes, which indicate extremely short quasar lifetimes ( t ...
Minghao Yue, Anna-Christina Eilers, Robert A. Simcoe, Sirio Belli, Frederick B. Davies, David DePalma, Joseph F. Hennawi, Charlotte A. Mason, Julian B. Muñoz, Erica J. Nelson, Sandro Tacchella   +10 more
doaj   +1 more source

The Strongest Cluster Lenses: An Analysis of the Relation between Strong Gravitational Lensing Strength and the Physical Properties of Galaxy Clusters [PDF]

, 2021
Strong gravitational lensing provides unique opportunities to investigate the mass distribution at the cores of galaxy clusters and to study high-redshift galaxies. Using 110 strong-lensing models of 74 cluster fields from the Hubble Frontier Fields (HFF)
C. Fox, G. Mahler, K. Sharon, J. D. Remolina González   +3 more
semanticscholar   +1 more source

DeepZipper. II. Searching for Lensed Supernovae in Dark Energy Survey Data with Deep Learning

The Astrophysical Journal, 2023
Gravitationally lensed supernovae (LSNe) are important probes of cosmic expansion, but they remain rare and difficult to find. Current cosmic surveys likely contain 5–10 LSNe in total while next-generation experiments are expected to contain several ...
R. Morgan, B. Nord, K. Bechtol, A. Möller, W. G. Hartley, S. Birrer, S. J. González, M. Martinez, R. A. Gruendl, E. J. Buckley-Geer, A. J. Shajib, A. Carnero Rosell, C. Lidman, T. Collett, T. M. C. Abbott, M. Aguena, F. Andrade-Oliveira, J. Annis, D. Bacon, S. Bocquet, D. Brooks, D. L. Burke, M. Carrasco Kind, J. Carretero, F. J. Castander, C. Conselice, L. N. da Costa, M. Costanzi, J. De Vicente, S. Desai, P. Doel, S. Everett, I. Ferrero, B. Flaugher, D. Friedel, J. Frieman, J. García-Bellido, E. Gaztanaga, D. Gruen, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, F. Menanteau, R. Miquel, A. Palmese, F. Paz-Chinchón, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, J. Prat, M. Rodriguez-Monroy, A. K. Romer, A. Roodman, E. Sanchez, V. Scarpine, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, T. N. Varga   +66 more
doaj   +1 more source

Detecting low-mass haloes with strong gravitational lensing I: the effect of data quality and lensing configuration [PDF]

, 2021
This paper aims to quantify how the lowest halo mass that can be detected with galaxy-galaxy strong gravitational lensing depends on the quality of the observations and the characteristics of the observed lens systems.
G. Despali, S. Vegetti, S. White, Devon Powell, H. Stacey, C. Fassnacht, F. Rizzo, Wolfgang Enzi   +7 more
semanticscholar   +1 more source

Andromeda’s Parachute: Time Delays and Hubble Constant

The Astrophysical Journal, 2023
The gravitational lens system PS J0147+4630 (Andromeda’s Parachute) consists of four quasar images ABCD and a lensing galaxy. We obtained r -band light curves of ABCD in the 2017−2022 period from monitoring with two 2 m class telescopes.
Vyacheslav N. Shalyapin, Luis J. Goicoechea, Karianne Dyrland, Håkon Dahle   +3 more
doaj   +1 more source

Searching for Axionlike Particles under Strong Gravitational Lenses [PDF]

Physical Review Letters, 2021
We establish strong gravitational lens systems as robust probes of axion-like particles (ALPs) -- a candidate for dark matter. A tiny interaction of photons with ALPs induces birefringence. Multiple images of gravitationally lensed polarised objects allow differential birefringence measurement, alleviating systematics and astrophysical dependencies. We
Aritra Basu, Jishnu Goswami, Dominik J. Schwarz, Yuko Urakawa   +3 more
openaire   +4 more sources

Strong gravitational lensing by static black holes in effective quantum gravity [PDF]

The European Physical Journal C
We investigate strong gravitational lensing by two static black hole models (Model-1 and Model-2) within the Effective Quantum Gravity (EQG) framework, characterized by mass M and parameter ζ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage ...
Yiyang Wang, Amnish Vachher, Qiang Wu, Tao Zhu, Sushant G. Ghosh   +4 more
semanticscholar   +1 more source

Strong Deflection Gravitational Lensing for the Photons Coupled to the Weyl Tensor in a Conformal Gravity Black Hole

Universe, 2023
In the present paper, strong deflection gravitational lensing is studied in a conformal gravity black hole. With the help of geometric optics limits, we have formulated the light cone conditions for the photons coupled to the Weyl tensor in a conformal ...
Ghulam Abbas, Ali Övgün, Asif Mahmood, Muhammad Zubair   +3 more
doaj   +1 more source

Strong gravitational lensing of a 4-dimensional Einstein–Gauss–Bonnet black hole in homogeneous plasma [PDF]

International Journal of Modern Physics D, 2020
We investigate the strong gravitational lensing of spherically symmetric black holes in the novel Einstein–Gauss–Bonnet (EGB) gravity surrounded by unmagnetized plasma medium.
Xing-hua Jin, Yuan Gao, Dao-Jun Liu
semanticscholar   +1 more source

Domain Adaptation for Simulation-based Dark Matter Searches with Strong Gravitational Lensing

The Astrophysical Journal, 2023
The identity of dark matter has remained surprisingly elusive. While terrestrial experiments may be able to nail down a model, an alternative method is to identify dark matter based on astrophysical or cosmological signatures.
Stephon Alexander, Sergei Gleyzer, Hanna Parul, Pranath Reddy, Marcos Tidball, Michael W. Toomey   +5 more
doaj   +1 more source