9 citations · 30 across the 13 of their papers we have counts for
13 papers
Multiband Color Monitoring of 3I/ATLAS through Ground-Based Relay Observations
Ariel Graykowski, Bryce Bolin, Laura-May Abron +140
We present multiband, long-baseline photometric observations of interstellar comet 3I throughout its 2025--2026 apparition using coordinated ground-based global relay observations.…
Detection of optical quasi-periodic oscillation in the blazar 3C 454.3
Karan Dogra, Alok C. Gupta, C. M. Raiteri +83
We analyzed 19 years of -band data of the blazar 3C 454.3 from the Whole Earth Blazar Telescope (WEBT) archive, along with new data from its members and from public archives suc…
Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales
Karan Dogra, Alok C. Gupta, C. M. Raiteri +79
Due to its peculiar and highly variable nature, the blazar 3C 454.3 has been extensively monitored by the WEBT team. Here, we present for the first time these long-term optical flu…
Stability Analysis Of Fractional Relativistic Polytropes
Mohamed S. Aboueisha, A. S. Saad, Mohamed I. Nouh +3
In astrophysics, the gravitational stability of a self-gravitating polytropic fluid sphere is an intriguing subject, especially when trying to comprehend the genesis and developmen…
Analysis of the Fractional Relativistic Polytropic Gas Sphere
Mohamed S. Aboueisha, Mohamed I. Nouh, Emad A-B. Abdel-Salam. Tarek M. Kamel +2
Many stellar configurations, including white dwarfs, neutron stars, black holes, supermassive stars, and star clusters, rely on relativistic effects. The Tolman-Oppenheimer-Volkoff…
Multi-band analyses of the bright GRB 230812B and the associated SN2023pel
T. Hussenot-Desenonges, T. Wouters, N. Guessoum +109
GRB~230812B is a bright and relatively nearby () long gamma-ray burst (GRB) that has generated significant interest in the community and has thus been observed over the en…
Investigating the hyperbolic and hybrid scalar field cosmologies with varying cosmological constant in gravity
Nasr Ahmed, Tarek M. Kamel
This paper investigated two scalar field cosmological models in gravity with cosmic transit and varying cosmological constant .The cosmological constant tends to hav…
Big rip in Swiss-cheese Brane-worlds with cosmic transit
Nasr Ahmed, M. Fekry, Tarek M. Kamel
We study the big rip scienario in Swiss-cheese Brane-worlds. The results obtained have been found to be independent of the value of the cosmological constant whether its positi…
A non-singular closed bouncing universe without violation of null energy condition
Nasr Ahmed, Tarek M. Kamel, Mohamed I Nouh
A matter bouncing entropy-corrected cosmological model has been suggested. The model allows only positive curvature with negative pressure and no violation of the null energy condi…
Stability Analysis of Relativistic Polytropes
A. S. Saad, M. I. Nouh, A. A. Shaker +1
A main question in astrophysics and cosmology has been the severe stability of the astrophysical objects, whether a particular equilibrium configuration is stable. In this article,…
Note on Dark Energy and Cosmic Transit in a scale-invariance cosmology
Nasr Ahmed, Tarek M. Kamel
In general, the laws of physics are not invariant under a change of scale. To find out whether the 'scale-invariance hypothesis' corresponds to nature or not, a careful examination…
Approximate Analytical Solutions to the Relativistic Isothermal Gas Spheres
A. S. Saad, M. I. Nouh, A. A. Shaker +1
In this paper, we introduce a novel analytical solution to Tolman-Oppenheimer-Volkoff (TOV) equation, which is ultimately a hydrostatic equilibrium equation derived from the genera…
White Dwarf Stars as Polytropic Gas Spheres
M. I. Nouh, A. S. Saad, M. M. Elkhateeb +1
Due to the highly degeneracy of electrons in white dwarf stars, we expect that the relativistic effects play very important role in these stars. In the present article, we study th…