Results 171 to 180 of about 2,953 (244)

Spacetime perspective of gravitational lensing in perturbed cosmologies. [PDF]

Sci Rep
Kling TP, Pooler SM.
europepmc   +1 more source

Stimulation Studiesof High Redshift Arcs by Strong Gravitational Lensing and Halo Mass Estimation through Weak Lensing.

, 2007
重力透鏡可分為強重力透鏡與弱重力透鏡。 強重力透鏡可將銀河系光源變形成多銀河系影像或巨弧影像，而弱重力透鏡產生微弱的變形。 而這篇論文主要是探討這兩種不同的情況。強重力透鏡在這篇論文主要是比較巨大的銀河弧的數量在標準宇宙模型與觀測之間的差異。我們發現標準宇宙模型依然與觀測結果相當符合。而此結果驗證了標準宇宙模型有很高的準確度。而弱重力透鏡在本論文中，是應用於星系團質量的測量，我們發現在標準的質量度量法會得到很高的不準確度，主因為銀河系本身的橢圓性質，與其他物質在測量銀河系間的投影效應 ...
吳君勉, Wu, Jun-Mein
core  

Modified Gravity: From Black Holes Entropy to Current Cosmology, 4th Edition. [PDF]

Entropy (Basel)
Bamba K.
europepmc   +1 more source

Poisson equation for weak gravitational lensing

, 2008
Using the Newman and Penrose [ E. T. Newman and R. Penrose J. Math. Phys. (N.Y.) 3 566 (1962)] spin-coefficient formalism, we examine the full Bianchi identities of general relativity in the context of gravitational lensing, where the matter and space ...
Kling, Thomas P., Campbell, B.
core  

Challenges and opportunities for time-delay cosmography with multi-messenger gravitational lensing. [PDF]

Philos Trans A Math Phys Eng Sci
Birrer S, Smith GP, Shajib AJ, Ryczanowski D, Arendse N.   +4 more
europepmc   +1 more source

Modeling Weak Gravitational Lensing Through C++

, 2009
Gravitational Lensing has become an integral part of astrophysics and the study of matter in the universe. In weak gravitational lensing, an object appears distorted when viewed from the observer’s perspective. This is caused by the bundle of light being
Cepero, Christopher
core  

Multi-messenger gravitational lensing. [PDF]

Philos Trans A Math Phys Eng Sci
Smith GP, Baker T, Birrer S, Collins CE, Ezquiaga JM, Goyal S, Hannuksela OA, Hemanta P, Hendry MA, Janquart J, Keitel D, Levan AJ, Lo RKL, More A, Nicholl M, Pastor-Marazuela I, Ponte Pérez AI, Ubach H, Uronen LE, Wright M, Zumalacarregui M, Bianco F, Çalişkan M, Chan JCL, Colangeli E, Gompertz BP, Haines CP, Hayes EE, Hu B, Lamb GP, Liu A, Mandhai S, Narola H, Nguyen QL, Poon JSC, Ryczanowski D, Seo E, Shajib AJ, Shan X, Tanvir N, Vujeva L.   +40 more
europepmc   +1 more source

Influence of the local Universe on weak gravitational lensing surveys

, 2019
Observations of the large-scale structure (LSS) implicitly assume an ideal Friedmann-Lemaitre-Robertson-Walker (FLRW) observer with the ambient structure having no influence on the observer.
Schafer, BM (15702959), Lautsch, M (15702962), Reischke, R (15702956), Lewis, GF (15538442), Krzysztof Bolejko (14732041)   +4 more
core  

Strong gravitational lenses from the Vera C. Rubin Observatory. [PDF]

Philos Trans A Math Phys Eng Sci
Shajib AJ, Smith GP, Birrer S, Verma A, Arendse N, Collett T, Daylan T, Serjeant S, LSST Strong Lensing Science Collaboration.   +8 more
europepmc   +1 more source

Challenges to the [Formula: see text]CDM cosmology. [PDF]

Philos Trans A Math Phys Eng Sci
Efstathiou G.
europepmc   +1 more source