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- University of KwaZulu-NatalZA93 papers
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30 papers · 1 filter
Strong Soft X-ray Excess in 2015 XMM-Newton Observation of BL--Lac OJ~287
Main Pal, Pankaj Kushwaha, Gulab C. Dewangan +1
We report a strong soft X-ray excess in the BL--Lacartae -ray blazar OJ~287 during the long exposure in May 2015, amongst two of the latest \xmm~{} observations performed in May…
Shadow cast and deflection of light by charged rotating regular black holes
Rahul Kumar, Sushant G. Ghosh, Anzhong Wang
We discuss the horizon properties, shadow cast, and the weak gravitational lensing of charged rotating regular black holes, which in addition to mass () and rotation parameter (…
Bardeen-like regular black holes in Einstein-Gauss-Bonnet gravity
Dharm Veer Singh, Sushant G. Ghosh, Sunil D. Maharaj
We find an exact spherically symmetric regular Bardeen-like solutions by considering the coupling between Einstein-Gauss-Bonnet theory and nonlinear electrodynamics (NED) in five-d…
Black string surrounded by a static anisotropic quintessence fluid
Md Sabir Ali, Fazlay Ahmed, Sushant G. Ghosh
A black string is a solution of the four-dimensional general relativity in cylindrical symmetric anti-de Sitter (AdS) spacetime pioneered by Lemos [6]. We obtain an exact rotating…
An Accelerating Cosmological Model from a Parametrization of Hubble Parameter
S. K. J. Pacif, Md Salahuddin Khan, L. K. Paikroy +1
In view of late-time cosmic acceleration, a dark energy cosmological model is revisited wherein Einstein's cosmological constant is considered as a candidate of dark energy. Exact…
Ultrafast Spectroscopy of Bi2Se3 Topological Insulator
P. Sharma, D. Sharma, N. Vashistha +4
We investigate the ultrafast transient absorption spectrum of Bi2Se3 topological insulator. Bi2Se3 single crystal is grown through conventional solid-state reaction routevia self-f…