Results 11 to 20 of about 94,999 (196)

Testing Strong Gravitational Lensing Effects of Supermassive Compact Objects with Regular Spacetimes [PDF]

open access: yesAstrophysical 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]

open access: yesJournal 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]

open access: yesSocial 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]

open access: yesMonthly 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]

open access: yesThe 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

open access: yesThe 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

open access: yesUniverse, 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

open access: yesThe 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]

open access: yesECCV 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

open access: yesThe 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

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