Results 51 to 60 of about 34,012 (161)

Magnification relations for Kerr lensing and testing Cosmic Censorship [PDF]

, 2007
A Kerr black hole with mass parameter m and angular momentum parameter a acting as a gravitational lens gives rise to two images in the weak field limit.
A. O. Petters, A. O. Petters, B. O’Neill, M. C. Werner, P. Schneider, R. Penrose, S. Chandrasekhar   +6 more
core   +1 more source

Generalized model-independent characterization of strong gravitational lenses V: reconstructing the lensing distance ratio by supernovae for a general Friedmann universe [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We determine the cosmic expansion rate from supernovae of type Ia to set up a data-based distance measure that does not make assumptions about the constituents of the universe, i.e.
J. Wagner, Sven Meyer
semanticscholar   +1 more source

Efficient and Realistic Brain Simulation: A Review and Design Guide for Memristor‐Based Approaches

Advanced Materials Technologies, Volume 10, Issue 17, September 4, 2025.
Memristor‐based emulation of Hodgkin‐Huxley neuron models is investigated, by defining the ideal device characteristics needed for accurate ion‐channel representation and reviewing existing works targeting memristive replication of biological realistic neural behavior.
Lennart Paul Liong Landsmeer, Muhammad Ali Siddiqi, Heba Abunahla, Mario Negrello, Said Hamdioui, Christos Strydis   +5 more
wiley   +1 more source

Gravitational lensing in modified Newtonian dynamics

, 2001
Modified Newtonian dynamics (MOND) is an alternative theory of gravity that aims to explain large-scale dynamics without recourse to any form of dark matter.
Mortlock, Daniel J., Turner, Edwin L.
core   +2 more sources

Describing variations of the Fisher-matrix across parameter space

, 2016
Forecasts in cosmology, both with Monte-Carlo Markov-chain methods and with the Fisher matrix formalism, depend on the choice of the fiducial model because both the signal strength of any observable as well as the model nonlinearities linking observables
Reischke, Robert, Schäfer, Björn Malte
core   +1 more source

Relational Supersymmetry via the Dressing Field Method and Matter‐Interaction Supergeometric Framework

Annalen der Physik, Volume 537, Issue 9, September 2025.
Applications of the Dressing Field Method are reviewed and further expanded to the very foundations of the supersymmetric framework, where it allows to build relational supersymmetric field theory. Furthermore, a novel approach is proposed giving a unified description of fermionic matter fields and bosonic gauge fields: a Matter‐Interaction ...
Jordan François, L. Ravera
wiley   +1 more source

Weak Gravitational Flexion

, 2005
Flexion is the significant third-order weak gravitational lensing effect responsible for the weakly skewed and arc-like appearance of lensed galaxies. Here we demonstrate how flexion measurements can be used to measure galaxy halo density profiles and ...
Bacon, D. J., Goldberg, D. M., Rowe, B. T. P., Taylor, A. N.   +3 more
core   +2 more sources

$f(R)$ gravity theories in the Palatini Formalism constrained from strong lensing

, 2009
$f(R)$ gravity, capable of driving the late-time acceleration of the universe, is emerging as a promising alternative to dark energy. Various $f(R)$ gravity models have been intensively tested against probes of the expansion history, including type Ia ...
Amarzguioui, Amendola, Armendariz-Picon, Armendariz-Picon, Astier, Borowiec, Browne, Caldwell, Caldwell, Capozziello, Capozziello, Capozziello, Carroll, Carvalho, Chae, Chae, Chae, Chen, Chen, Chiba, Choi, Cole, Copeland, Da-Ming Chen, Dabrowski, Dave, de Bernardis, Eisenstein, Erickcek, Fay, Hinshaw, Hopkins, Huterer, Im, Inada, Kamenshchik, Keeton, Keeton, Kochanek, Kochanek, Kochanek, Koivisto, Koopmans, Koopmans, Li, Li, Li, Li, Li, Li, Mao, Maoz, Mitchell, Moller, Navarro, Nojiri, Nojiri, Ofek, Oguri, Oguri, Oguri, Oguri, Olmo, Olmo, Page, Perlmutter, Richards, Riess, Riess, Riess, Rix, Rusin, Santos, Sarbu, Seljak, Sotiriou, Sotiriou, Sotiriou, Spergel, Spergel, Tegmark, Tegmark, Vollick, Weinberg, Wu, Wu, Wu, Wu, Wyithe, Xin-Juan Yang, Zhang, Zhu, Zhu   +92 more
core   +3 more sources

Intrinsic alignments of group and cluster galaxies in photometric surveys [PDF]

, 2014
Intrinsic alignments of galaxies have been shown to contaminate weak gravitational lensing observables on linear scales, $r>$ 10 $h^{-1}$Mpc, but studies of alignments in the non-linear regime have thus far been inconclusive.
Bahcall, Neta, Chisari, Nora Elisa, Huff, Eric, Mandelbaum, Rachel, Strauss, Michael A.   +4 more
core   +2 more sources

A Smithian Political Economy Approach for the Competition Law of the 21st Century

The Modern Law Review, Volume 88, Issue 4, Page 712-768, July 2025.
This study aims to show how a Smithian political economy approach could assist competition law in addressing the challenges of the 21st‐century economy. We revisit Smith's Wealth of Nations to provide a more nuanced understanding of his views, contrasting them with the prevailing libertarian interpretation called here ‘Chicago Smith’.
Stavros Makris
wiley   +1 more source