Results 51 to 60 of about 70,851 (245)

Primordial black hole detection through diffractive microlensing

, 2018
Recent observations of gravitational waves motivate investigations for the existence of Primordial Black Holes (PBHs). We propose the observation of gravitational microlensing of distant quasars for the range of infrared to the submillimeter wavelengths ...
Mehrabi, A., Naderi, T., Rahvar, S.
core   +1 more source

Gravitational lens interference

The Astrophysical Journal, 1991
The consequence of the existence, when a lens is present, of two propagation paths from a source to the observer is investigated. Attention is focused on quasars as background sources; however, the results received are general and apply to pulsars and stellar sources as well. 12 refs.
J. B. Peterson, Toby Falk
openaire   +1 more source

Galaxy mergers and gravitational lens statistics [PDF]

The Astrophysical Journal, 1994
We investigate the impact of hierarchical galaxy merging on the statistics of gravitational lensing of distant sources. Since no definite theoretical predictions for the merging history of luminous galaxies exist, we adopt a parametrized prescription, which allows us to adjust the expected number of pieces comprising a typical present galaxy at z=0.65.
Rix, Hans-Walter, Maoz, Dan, Turner, Edwin L., Fukugita, Masataka   +3 more
openaire   +2 more sources

CLASS B2108+213: A new wide separation gravitational lens system [PDF]

, 2004
We present observations of CLASS B2108+213, the widest separation gravitational lens system discovered by the Cosmic Lens All-Sky Survey. Radio imaging using the VLA at 8.46 GHz and MERLIN at 5 GHz shows two compact components separated by 4.56 arcsec ...
Biggs, A. D., Blandford, R. D., Browne, I. W. A., de Bruyn, A. G., Fassnacht, C. D., Jackson, N. J., Koopmans, L. V. E., Mao, S., McKean, J. P., Myers, S. T., Norbury, M. A., Pearson, T. J., Phillips, P. M., Readhead, A. C. S., Rusin, D., Treu, T., Wilkinson, P. N., York, T. D.   +17 more
core   +4 more sources

Gravitationally lensed orphan afterglows of gamma-ray bursts [PDF]

, 2022
Hao-Xuan Gao, Jin-Jun Geng, Lei Hu, Maokai Hu, Guang-Xuan Lan, Chen‐Ming Chang, Songbo Zhang, Xiao-Li Zhang, Yong-Feng Huang, Xue-Feng Wu   +9 more
openalex   +1 more source

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research
The celebrated theory of general relativity has inspired research on optical simulations using artificial microstructures to mimic curved space–times.
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
doaj   +1 more source

A comparison of approximate gravitational lens equations and a proposal for an improved new one

, 2008
Keeping the exact general relativistic treatment of light bending as a reference, we compare the accuracy of commonly used approximate lens equations. We conclude that the best approximate lens equation is the Ohanian lens equation, for which we present ...
A. O. Petters, K. S. Virbhadra, P. Schneider, S. Mollerach, S. Refsdal, V. Bozza, V. Perlick   +6 more
core   +1 more source

Lensing of gravitational waves from tidal disruption events [PDF]

, 2023
Martina Toscani, Elena M. Rossi, Nicola Tamanini, Giulia Cusin   +3 more
openalex   +1 more source

The wave nature of continuous gravitational waves from microlensing [PDF]

, 2019
Gravitational wave predicted by General Relativity is the transverse wave of spatial strain. Several gravitational waveform signals from binary black holes and from a binary neutron star system accompanied by electromagnetic counterparts have been ...
Biesiada, Marek, Fan, Xi-Long, Liao, Kai
core   +2 more sources

Auto-detection of strong gravitational lenses using convolutional neural networks

Emergent Scientist, 2018
We propose a method for the automated detection of strong galaxy-galaxy gravitational lenses in images, utilising a convolutional neural network (CNN) trained on 210 000 simulated galaxy-galaxy lens and non-lens images.
Pearson James, Pennock Clara, Robinson Tom   +2 more
doaj   +1 more source