Constraining a modified gravity theory in strong gravitational lensing and black hole shadow observations [PDF]
Physical Review D, 2022 We study the strong gravitational lensing effect around rotating black holes in different gravity theories. By calculating the deflection angle of strong gravitational lensing, we evaluate the lensing observables including the image position, separation ...
Xiao-Mei Kuang +3 more
semanticscholar +1 more source
Testing Strong Gravitational Lensing Effects of Supermassive Compact Objects with Regular Spacetimes [PDF]
Astrophysical Journal, 2022 We compare and contrast gravitational lensing, in the strong field limit, by the photon sphere in spherically symmetric regular electrically charged (REC) black holes (0 < b ≤ b E ) and with those by corresponding REC no-horizon spacetimes (b > b E ...
J. Kumar +2 more
semanticscholar +1 more source
Shadows and Strong Gravitational Lensing by Van Derwaals Black Hole in Homogeneous Plasma [PDF]
Social Science Research Network, 2022 In this paper, we first analyze the horizon structure of the Van der Waals(VdW) black hole and then investigate its shadow in the absence of a plasma medium as well as the presence of a homogeneous plasma medium.
Niyaz Uddin Molla, U. Debnath
semanticscholar +1 more source
Strong gravitational lensing by rotating Simpson-Visser black holes [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 We investigate strong field gravitational lensing by rotating Simpson-Visser black hole, which has an additional parameter (0 ≤ l/2M ≤ 1), apart from mass (M) and rotation parameter (a).
Shafqat Ul Islam +2 more
semanticscholar +1 more source
APPLICATIONS OF STRONG-LENSING FOR SOME GRAVITATIONAL LENSES
Journal of Al-Nahrain University Science, 2007 Abdullah K. Ahmed, Ayad A. AL – Ani
openalex +4 more sources
Strong Gravitational Lensing Parameter Estimation with Vision Transformer [PDF]
ECCV Workshops, 2022 Quantifying the parameters and corresponding uncertainties of hundreds of strongly lensed quasar systems holds the key to resolving one of the most important scientific questions: the Hubble constant ($H_{0}$) tension.
Kuan-Wei Huang +6 more
semanticscholar +1 more source
Investigating strong gravitational lensing effects by supermassive black holes with Horndeski gravity [PDF]
The European Physical Journal C, 2021 We study gravitational lensing in strong-field limit by a static spherically symmetric black hole in quartic scalar field Horndeski gravity having additional hair parameter q, evading the no-hair theorem.
J. Kumar +2 more
semanticscholar +1 more source
A New Way to Explore Cosmological Tensions Using Gravitational Waves and Strong Gravitational Lensing [PDF]
Astrophysical Journal, 2021 In recent years, a crisis in the standard cosmology has been caused by inconsistencies in the measurements of some key cosmological parameters, the Hubble constant H 0 and cosmic curvature parameter Ω K , for example.
Mengran Cao +4 more
semanticscholar +1 more source
Strong gravitational lensing by Kerr and Kerr-Newman black holes [PDF]
Physical Review D, 2021 We study the strong gravitational lensing due to the Kerr black holes with angular momentum $a$ and the Kerr-Newman black holes with additional charge $Q$.
T. Hsieh, Da-Shin Lee, Chi-Yong Lin
semanticscholar +1 more source
On the detection and precise localisation of merging black holes events through strong gravitational lensing [PDF]
, 2022 To unlock the full spectrum of astrophysical and cosmological applications of gravitational-wave detections, it is essential to localise the associated black-hole mergers to high precision inside their host galaxies.
Ewoud Wempe +4 more
semanticscholar +1 more source