Results 21 to 30 of about 34,013 (306)

Strong Gravitational Lensing with the SKA [PDF]

Proceedings of Advancing Astrophysics with the Square Kilometre Array — PoS(AASKA14), 2015
Strong gravitational lenses provide an important tool to measure masses in the distant Universe, thus testing models for galaxy formation and dark matter; to investigate structure at the Epoch of Reionization; and to measure the Hubble constant and possibly w as a function of redshift.
Mckean, J. P., Jackson, N., Vegetti, S., Rybak, M., Serjeant, S., Koopmans, L. V. E., METCALF, ROBERT BENTON, Fassnacht, C. D., Marshall, P. J., Pandey Pommier, M.   +9 more
openaire   +5 more sources

Erratum: Strong gravitational lensing by wormholes

Journal of Cosmology and Astroparticle Physics, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shaikh, Rajibul, Banerjee, Pritam, Paul, Suvankar, Sarkar, Tapobrata   +3 more
openaire   +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

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

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   +4 more sources

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 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

Effects of early dark energy on strong cluster lensing [PDF]

, 2006
We use the semi-analytic method developed by Fedeli et al. for computing strong-lensing optical depths to study the statistics of gravitational arcs in four dark-energy cosmologies. Specifically, we focus on models with early dark energy and compare them
Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Benson, Bond, Brax, C. Fedeli, Caldwell, Cassano, Chandrasekhar, Dalal, Dolag, Doran, Doran, Fedeli, Ferreira, Gladders, Goldstein, Hasinger, Hawkins, Keeton, Lacey, Li, M. Bartelmann, Manera, Maor, Meneghetti, Meneghetti, Meneghetti, Meneghetti, Mota, Navarro, Navarro, Peebles, Peebles, Press, Randall, Readhead, Rebolo, Riess, Smail, Somerville, Spergel, Tegmark, Thompson, Torri, Wambsganss, Wang, Wetterich, Wetterich, Zaritsky   +52 more
core   +1 more source

PyAutoLens: Open-Source Strong Gravitational Lensing [PDF]

Journal of Open Source Software, 2021
Strong gravitational lensing, which can make a background source galaxy appears multiple times due to its light rays being deflected by the mass of one or more foreground lens galaxies, provides astronomers with a powerful tool to study dark matter, cosmology and the most distant Universe.
James. Nightingale, Richard Hayes, Ashley Kelly, Aristeidis Amvrosiadis, Amy Etherington, Qiuhan He, Nan Li, XiaoYue Cao, Jonathan Frawley, Shaun Cole, Andrea Enia, Carlos Frenk, David Harvey, Ran Li, Richard Massey, Mattia Negrello, Andrew Robertson   +16 more
openaire   +3 more sources

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