Results 121 to 130 of about 135,378 (342)

GLANCE -- Gravitational Lensing Authenticator using Non-Modelled Cross-Correlation Exploration of Gravitational Wave Signals [PDF]

Mon. Not. R. Astron. Soc. 532(4), 4842-4863 (2024)
Gravitational lensing is the phenomenon where the presence of matter (called a lens) bends the path of light-like trajectories travelling nearby. Similar to the geometric optics limit of electromagnetic waves, gravitational lensing of gravitational waves (GWs) can occur in geometric optics condition when GW wavelength is much smaller than the ...
arxiv   +1 more source

GRAVITATIONAL LENSING AS FOLDS IN THE SKY [PDF]

International Journal of Modern Physics A, 2000
We revisit the gravitational lensing phenomenon using a new visualization technique. It consists in projecting the observers sky into the source plane, what gives rise to a folded and stretched surface. This provides a clear graphical tool to visualize some interesting well-known effects, such as the development of multiple images of a source, the ...
Mollerach, Silvia, Roulet, Esteban
openaire   +4 more sources

A deconstruction of methods to derive one-point lensing statistics

The Open Journal of Astrophysics
Gravitational lensing is a crucial tool for exploring cosmic phenomena, providing insights into galaxy clustering, dark matter, and dark energy. Given the substantial computational demands of $N$-body simulations, approximate methods like $\texttt ...
Viviane Alfradique, Tiago Castro, Valerio Marra, Miguel Quartin, Carlo Giocoli, Pierluigi Monaco   +5 more
doaj   +1 more source

Nova Geminorum 1912 and the Origin of the Idea of Gravitational Lensing

, 2007
Einstein's early calculations of gravitational lensing, contained in a scratch notebook and dated to the spring of 1912, are reexamined. A hitherto unknown letter by Einstein suggests that he entertained the idea of explaining the phenomenon of new stars
A. Retter, Albert Einstein, Arthur S. Eddington, Emil Arnold Budde, Emil Arnold Budde, Emil Arnold Budde, H. Ludendorff, Hermann Fernau, Hilmar W. Duerbeck, J. Fischer-Petersen, John D Norton, Jürgen Renn, Klaus Hentschel, Klaus Hentschel, Leon Campbell, Michael M. Shara, Oliver J Lodge, Orest Chwolson, R. Werner, Ragnar Furuhjelm, Tilman Sauer   +20 more
core   +2 more sources

The Basics of Lensing [PDF]

arXiv, 2003
The basic equations and geometry of gravitational lensing are described, as well as the most important contexts in which it is observed in astronomy: strong lensing, weak lensing and microlensing.
arxiv  

Gravitational Lenses: Observations [PDF]

Symposium - International Astronomical Union, 1986
The gravitational lens phenomenon is shown to be not uncommon. A search is now underway to find a larger number of examples, using the VLA to search for candidates, following up with optical observations to establish equality of redshifts in the images.
openaire   +2 more sources

Tackling ignorance about law in human rights education

British Educational Research Journal, EarlyView.
Abstract This paper aims to unpack potential reasons why law and legal knowledge—despite its apparent importance and value in teaching and learning about human rights—appears to be largely conspicuous by its absence in human rights education (HRE) in schooling.
Suzanne Egan
wiley   +1 more source

Discovering disagreement: The story of an undergraduate Wartime Quartet reading group

Journal of Philosophy of Education, Volume 56, Issue 6, Page 851-862, December 2022., 2022
Abstract This paper describes and analyses the experience of the participants of an undergraduate reading group on ‘The Wartime Quartet’. In the first section, I explain the set‐up of the reading group. In the second section, I discuss what the participants shared and the trends we noticed in our experiences as women and marginalised genders studying ...
Anne‐Marie McCallion
wiley   +1 more source

Detecting Stellar Lensing of Gravitational Waves with Ground-Based Observatories

, 2018
We investigate the ability of ground based gravitational wave observatories to detect gravitational wave lensing events caused by stellar mass lenses. We show that LIGO and Virgo possess the sensitivities required to detect lenses with masses as small as
Christian, Pierre, Loeb, Abraham, Vitale, Salvatore   +2 more
core   +1 more source

Gravitational Lensing in Modified Gravity and the Lensing of Merging Clusters without Dark Matter [PDF]

arXiv, 2006
Gravitational lensing in a modified gravity (MOG) is derived and shown to describe lensing without postulating dark matter. The recent data for merging clusters identified with the interacting cluster 1E0657-56 is shown to be consistent with a weak lensing construction based on MOG without exotic dark matter.
arxiv