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
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
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
Probing Dark Matter with Strong Gravitational Lensing through an Effective Density Slope [PDF]
Monthly notices of the Royal Astronomical Society, 2022 Many dark matter (DM) models that are consistent with current cosmological data show differences in the predicted (sub)halo mass function, especially at sub-galactic scales, where observations are challenging due to the inefficiency of star formation ...
Atincc cCaugan cSengul, C. Dvorkin
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
Gravitational Lensing of Acoustic Charged Black Holes
The Astrophysical Journal, 2023 We study the gravitational lensing of acoustic charged black holes in strong and weak field limit approximations. For this purpose, we first numerically obtain the deflection limit coefficients and deflection angle in the strong field limit.
Niyaz Uddin Molla, Ujjal Debnath
doaj +1 more source
Geometric Outlines of the Gravitational Lensing and Its Astronomic Applications
Universe, 2023 Gravitational lensing is a topic of great application value in the field of astronomy. The properties and research methods of gravitational lensing are closely related to the geometric and relativistic characteristics of the background universe.
Bin Shen, Mingyang Yu
doaj +1 more source
A Highly Magnified Gravitationally Lensed Red QSO at z = 2.5 with a Significant Flux Ratio Anomaly
The Astrophysical Journal, 2023 We present the discovery of a gravitationally lensed dust-reddened QSO at z = 2.517, identified in a survey for QSOs by infrared selection. Hubble Space Telescope imaging reveals a quadruply lensed system in a cusp configuration, with a maximum image ...
Eilat Glikman +14 more
doaj +1 more source
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
Determination of Lens Mass Density Profile from Strongly Lensed Gravitational-wave Signals
The Astrophysical Journal, 2023 As the interferometers detecting gravitational waves are upgraded, improving their sensitivity, the probability of observing strong lensing increases. Once a detection is made, it will be critical to gain as much information as possible about the lensing
Mick Wright +2 more
doaj +1 more source