Results 1 to 10 of about 69,883 (320)

The Optimal Gravitational Lens Telescope [PDF]

open access: yesThe Astronomical Journal, 2010
Given an observed gravitational lens mirage produced by a foreground deflector (cf. galaxy, quasar, cluster,...), it is possible via numerical lens inversion to retrieve the real source image, taking full advantage of the magnifying power of the cosmic ...
Bolton   +15 more
core   +14 more sources

Spacetime perspective of gravitational lensing in perturbed cosmologies [PDF]

open access: yesScientific Reports
We develop the spacetime approach to gravitational lensing by spherically symmetric perturbations of flat, cosmological constant-dominated Friedman-Robertson-Walker metrics.
Thomas P. Kling, Sophia MacQueen Pooler
doaj   +2 more sources

Gravitational Lensing of Supernova Neutrino Bursts

open access: yesUniverse, 2021
Supernova neutrino bursts have been observed from extragalactic distances. This note addresses the question of how gravitational lensing could distort the information in the burst.
John M. LoSecco
doaj   +1 more source

DETERMINE THE EFFECTIVE PARAMETERS IN GRAVITATIONAL LENSES AND STUDY THE ALTERNATIVE EFFECTS BETWEEN THEM [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2012
The importance of the gravitational lens in cosmology and astronomy, and a brief historical review for the evolution of the gravitational lenses have been introduced.
S. A.AL-SABAAWE, M. A.AL-OBAYDE
doaj   +1 more source

Gravitational Lensing of Continuous Gravitational Waves

open access: yesUniverse, 2021
Continuous gravitational waves are analogous to monochromatic light and could therefore be used to detect wave effects such as interference or diffraction. This would be possible with strongly lensed gravitational waves.
Marek Biesiada, Sreekanth Harikumar
doaj   +1 more source

Can Einstein (rings) surf Gravitational Waves?

open access: yesThe Open Journal of Astrophysics, 2023
How does the appearance of a strongly lensed system change if a gravitational wave is produced by the lens? In this work we address this question by considering a supermassive black hole binary at the center of the lens emitting gravitational waves ...
Leonardo Giani   +2 more
doaj   +1 more source

Salih Vezir Büyük Vezir’e Karşı: Farklı Tarihsel Anlatılarda ʿAlī b. ʿĪsā ve İbnu’l-Furāt’ın Profillerinin Değişimi

open access: yesAnkara Üniversitesi İlahiyat Fakültesi Dergisi, 2022
Araştırmamız büyük olaylar ve tarihsel figürler arasındaki ilişkiyi konu edinmektedir. Büyük olaylar; tarihte önemli kırılmalara yol açan krizler, çöküşler, zaferler gibi hadiselerdir.
Abdülvahid Yakub Sipahioğlu
doaj   +1 more source

Fixed Points Features in N-Point Gravitational Lenses

open access: yesEast European Journal of Physics, 2019
A set of fixed points in N-point gravitational lenses is studied in the paper. We use complex form of lens mapping to study fixed points. There are some merits of using a complex form over coordinate. In coordinate form gravitational lens is described by
Volodymyr Shablenko
doaj   +1 more source

SOME COROLLARY FACTS OF THE N-POINT GRAVITATIONAL LENS EQUATION IN A COMPLEX FORM

open access: yesOdessa Astronomical Publications, 2019
In the theory of the N-point gravita- tional lens equation, two groups of problems can be dis- tinguished. These are the so-called primal and inverse problems.
O. A. Osmayev   +3 more
doaj   +1 more source

Studies of relativistic effects with radioastron space mission [PDF]

open access: yesSerbian Astronomical Journal, 2007
In the review we discuss possible studies of GR phenomena such as gravitational microlensing and shadow analysis with the forthcoming RadioAstron space mission.
Zakharov A.F.
doaj   +1 more source

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