Results 51 to 60 of about 335,502 (306)

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

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

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

Joint constraints on thermal relic dark matter from strong gravitational lensing, the Ly α forest, and Milky Way satellites [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We derive joint constraints on the warm dark matter (WDM) half-mode scale by combining the analyses of a selection of astrophysical probes: strong gravitational lensing with extended sources, the Ly α forest, and the number of luminous satellites in ...
Wolfgang J. R. Enzi, R. Murgia, Oliver Newton, S. Vegetti, C. Frenk, M. Viel, Marius Cautun, C. Fassnacht, M. Auger, G. Despali, J. McKean, L. Koopmans, M. Lovell   +12 more
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

Parameters estimation and strong gravitational lensing of nonsingular Kerr-Sen black holes [PDF]

, 2020
The recent time witnessed a surge of interest in strong gravitational lensing by black holes is due to the Event Horizon Telescope (EHT) results, which suggest comparing the black hole lensing in both general relativity and heterotic string theory.
Sushant G. Ghosh, Rahul Kumar, Shafqat Ul Islam   +2 more
semanticscholar   +1 more source

What does strong gravitational lensing? The mass and redshift distribution of high-magnification lenses [PDF]

Monthly notices of the Royal Astronomical Society, 2020
Many distant objects can only be detected, or become more scientifically valuable, if they have been highly magnified by strong gravitational lensing.
A. Robertson, Graham P. Smith, R. Massey, V. Eke, M. Jauzac, M. Bianconi, Dan Ryczanowski   +6 more
semanticscholar   +1 more source

Detecting strong gravitational lensing of gravitational waves with TianQin

Physical Review D, 2023
When gravitational waves (GWs) pass by a massive object on its way to Earth, a strong gravitational lensing effect will happen. Thus, the GW signal will be amplified, deflected, and delayed in time. Through analyzing the lensed GW waveform, physical properties of the lens can be inferred. On the other hand, neglecting lensing effects in the analysis of
Xin-yi Lin, Jian-dong Zhang, Liang Dai, Shun-Jia Huang, Jianwei Mei   +4 more
openaire   +3 more sources

Black and minority ethnic student teachers' stories as empirical documents of hidden oppressions: Using the personal to turn towards the structural

British Educational Research Journal, Volume 48, Issue 6, Page 1145-1160, December 2022., 2022
Abstract Racism, as a covert but pervasive presence in teacher education in England, remains a major structural issue and its effects on student teachers who are Black and Asian are real and troubling. Their personal stories reveal multiple challenges and present empirical evidence that can usefully be analysed to examine their experience of daily ...
Diane Warner
wiley   +1 more source

Hierarchical Inference with Bayesian Neural Networks: An Application to Strong Gravitational Lensing [PDF]

arXiv.org, 2020
In the past few years, approximate Bayesian Neural Networks (BNNs) have demonstrated the ability to produce statistically consistent posteriors on a wide range of inference problems at unprecedented speed and scale.
S. Wagner-Carena, Ji Won Park, S. Birrer, P. Marshall, A. Roodman, Risa Wechsler   +5 more
semanticscholar   +1 more source