Results 71 to 80 of about 70,851 (245)

Gravitational lensing by a dark compact object in modified gravity and observational constraints from Einstein rings

European Physical Journal C: Particles and Fields
In this manuscript, we provide a comprehensive study of gravitational lensing by dark compact objects predicted by modified gravity (MOG) based on the scalar–vector–tensor action, with the aim of providing new insights into the nature of gravitational ...
Nagina Rehman, Zoe C. S. Chan, Mubasher Jamil, Mustapha Azreg-Aïnou   +3 more
doaj   +1 more source

Inferring Properties of Dark Galactic Halos Using Strongly Lensed Gravitational Waves

The Astrophysical Journal
Gravitational waves (GWs) can be deflected, similarly to electromagnetic (EM) waves, by massive objects through the phenomenon of gravitational lensing .
Eungwang Seo, Tjonnie G. F. Li, Martin A. Hendry   +2 more
doaj   +1 more source

LenNet: direct detection and localization of strong gravitational lenses in wide-field sky survey images

Frontiers in Astronomy and Space Sciences
Strong gravitational lenses are invaluable for tackling fundamental astrophysics questions, such as the nature of dark matter and cosmic expansion.
Pufan Liu, Pufan Liu, Hui Li, Ziqi Li, Ziqi Li, Xiaoyue Cao, Xiaoyue Cao, Xiaoyue Cao, Rui Li, Hao Su, Ran Li, Nicola R. Napolitano, Léon V. E. Koopmans, Valerio Busillo, Crescenzo Tortora, Liang Gao, Liang Gao   +16 more
doaj   +1 more source

A method to measure a relative transverse velocity of source-lens-observer system using gravitational lensing of gravitational waves

, 2009
Gravitational waves propagate along null geodesics like light rays in the geometrical optics approximation, and they may have a chance to suffer from gravitational lensing by intervening objects, as is the case for electromagnetic waves.
A. R. Thompson, Makoto Hattori, P. Schneider, R. Kayser, Toshifumi Futamase, Yousuke Itoh   +5 more
core   +1 more source

Velocity effects on second order contributions to gravitational frequency shift by a moving Kerr–Newman black hole

European Physical Journal C: Particles and Fields, 2019
The significance of the radial velocity effects on the leading-order gravitational frequency shift in some special cases was reported recently. This paper investigates the gravitational shift of frequency of light propagating in the equatorial plane of a
Guansheng He, Chaohong Pan, Wenbin Lin
doaj   +1 more source

Quasi-geometrical Optics Approximation in Gravitational Lensing

, 2004
The gravitational lensing of gravitational waves should be treated in the wave optics instead of the geometrical optics when the wave length $\lambda$ of the gravitational waves is larger than the Schwarzschild radius of the lens mass $M$.
Baraldo, Bartelmann, Bontz, De Paolis, De Paolis, Deguchi, Nakamura, Navarro, Ohanian, Peters, Press, R. Takahashi, Ruffa, Seto, Takahashi, Zakharov   +15 more
core   +1 more source

Separability of rotational effects on a gravitational lens

Physical Review D, 2003
12 pages (RevTeX); accepted for publication in Phys.
Asada, Hideki, Kasai, Masumi, Yamamoto, Tatsuya   +2 more
openaire   +2 more sources

Gravitational lens surveys with LOFAR [PDF]

Proceedings of From Planets to Dark Energy: the Modern Radio Universe — PoS(MRU), 2008
Deep surveys planned as a Key Science Project of LOFAR provide completely new opportunities for gravitational lens searches. For the first time do large-scale surveys reach the resolution required for a direct selection of lens candidates using morphological criteria. We briefly describe the strategies that we will use to exploit this potential.
Olaf Wucknitz, Michael Garrett
openaire   +1 more source

Non-parametric inversion of gravitational lensing systems with few images using a multi-objective genetic algorithm

, 2007
Galaxies acting as gravitational lenses are surrounded by, at most, a handful of images. This apparent paucity of information forces one to make the best possible use of what information is available to invert the lens system.
Abdelsalam, Blandford, Bradač, Broadhurst, Charbonneau, Deb, Diego, H. Dejonghe, Holland, J. Liesenborgs, Keeton, Kneib, Kochanek, Koopmans, Koza, Liesenborgs, P. Bekaert, Plummer, S. De Rijcke, Saha, Saha, Schneider, Shamos   +22 more
core   +1 more source

Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky. [PDF]

Nat Astron, 2023
Goobar A, Johansson J, Schulze S, Arendse N, Carracedo AS, Dhawan S, Mörtsell E, Fremling C, Yan L, Perley D, Sollerman J, Joseph R, Hinds KR, Meynardie W, Andreoni I, Bellm E, Bloom J, Collett TE, Drake A, Graham M, Kasliwal M, Kulkarni SR, Lemon C, Miller AA, Neill JD, Nordin J, Pierel J, Richard J, Riddle R, Rigault M, Rusholme B, Sharma Y, Stein R, Stewart G, Townsend A, Vinko J, Wheeler JC, Wold A.   +37 more
europepmc   +1 more source