Výsledky vyhledávání - "KALA, SHUBHAM"

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Testing black holes with cosmological constant in Einstein-bumblebee gravity through the black hole shadow using EHT data and deflection angle

Autor: Pantig, Reggie C., Kala, Shubham, Övgün, Ali, Lobos, Nikko John Leo S.

The paper investigates black hole solutions with a cosmological constant in Einstein-Bumblebee gravity, which incorporates Lorentz symmetry breaking. Focusing on black hole thermodynamics, the study examines modifications to the first law, the equati

Externí odkaz: http://arxiv.org/abs/2410.13661

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Strong Gravitational Lensing by Bardeen Black Hole in Cloud of Strings

Autor: Vishvakarma, Bijendra Kumar, Kala, Shubham, Siwach, Sanjay

We investigate the gravitational lensing by Bardeen black hole in cloud of strings (CoS) in strong field limit. The effect of CoS parameter $b$ has been outlined in comparison with Bardeen black hole lens. The impact parameter increases as we increas

Externí odkaz: http://arxiv.org/abs/2408.05018

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Shadow and weak gravitational lensing of a rotating regular black hole in a non-minimally coupled Einstein-Yang-Mills theory in the presence of plasma

Autor: Kala, Shubham, Nandan, Hemwati, Sharma, Prateek

Publikováno v: Eur. Phys. J. Plus (2022)

The null geodesics of the regular and rotating magnetically charged black hole in a non-minimally coupled Einstein-Yang-Mills theory surrounded by a plasma medium is studied. The effect of magnetic charge and Yang-Mills parameter on the effective pot

Externí odkaz: http://arxiv.org/abs/2207.10717

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Geodesics and Bending of Light around a BTZ Black Hole Surrounded by Quintessential Matter

Autor: Kala, Shubham, Nandan, Hemwati, Sharma, Prateek, Elmardi, Maye

Various observations from cosmic microwave background radiation (CMBR), type Ia supernova and baryon acoustic oscillations (BAO) are strongly suggestive of an accelerated expansion of the universe which can be explained by the presence of mysterious

Externí odkaz: http://arxiv.org/abs/2109.14991

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Deflection of Light Around a Rotating BTZ Black Hole

Autor: Kala, Shubham, Nandan, Hemwati, Sharma, Prateek

Publikováno v: Modern Physics Letters A 2050323 (2020)

We present a detailed study of gravitational lensing around a rotating BTZ black hole in (2+1) dimensional gravity. The study of orbits for massless test particle around this BH spacetime is performed to describe the nature of cosmological constant i

Externí odkaz: http://arxiv.org/abs/2010.16183

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Deflection of Light and Shadow Cast by a Dual Charged Stringy Black Hole

Autor: Kala, Shubham, Saurabh, Nandan, Hemwati, Sharma, Prateek

Publikováno v: International Journal of Modern Physics A Vol. 35 (2020) 2050177

Gravitational lensing and black hole shadows are one of the strongest observational evidences to prove the existence of black holes in the universe. The gravitational lensing arises due to the deflection of light by the gravitational field of a gravi

Externí odkaz: http://arxiv.org/abs/2010.03615

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