125 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Northern Border UniversitySA30 papers
- Centre National de la Recherche ScientifiqueFR16 papers
- Taibah UniversitySA16 papers
- Cairo UniversityEG12 papers
- Instituto de Astrofísica de AndalucíaES11 papers
- Université Paris CitéFR11 papers
- Astrophysique, Instrumentation et ModélisationFR10 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR10 papers
- Leibniz Institute for Astrophysics PotsdamDE10 papers
- Sorbonne UniversitéFR10 papers
- Astronomical ObservatoryRS9 papers
- CEA Paris-SaclayFR9 papers
15 papers · 1 filter
Breaking the dichotomy between typical and anomalous globular clusters: the case of NGC 3201
Bruno Dias, Ignacio Araya, João Paulo Nogueira-Cavalcante +2
We recently discovered that NGC 3201 has characteristics that set it outside the current twofold classification scheme for Galactic globular clusters (GCs). Most GCs are mono-metal…
The kinematical and space structures of IC 2391 open cluster and moving group with Gaia-DR2
E. S. Postnikova, W. H. Elsanhoury, Devesh P. Sariya +3
The kinematical parameters, spatial shape and structure of the open cluster IC 2391 and the associated stellar stream are studied here using Gaia-DR2 (GDR2) astrometry data. The ap…
Employing Game Theory and TDMA Protocol to Enhance Security and Manage Power Consumption in WSNs-based Cognitive Radio
Mohamed S. Abdalzaher, Osamu Muta
The rapid development of wireless sensor networks (WSNs) is the significant incentive to contribute in the vulnerable applications such as cognitive radio (CR). This paper proposes…
The Rest-frame -band Luminosity Function of Red Sequence Galaxies in Clusters at
Jeffrey C. C. Chan, Gillian Wilson, Gregory Rudnick +22
We present results on the rest-frame -band luminosity functions (LF) of red sequence galaxies in seven clusters at 1.0 < z < 1.3 from the Gemini Observations of Galaxies in Rich…
Conformable Fractional Polytropic Gas Spheres
E. A. -B. Abd-Elsalam, Mohamed I. Nouh
Lane Emden differential equation of the polytropic gas sphere could be used to construct simple models of stellar structures, star clusters and many configurations in astrophysics.…
Crossing the phantom divide line in universal extra dimensions
Nasr Ahmed, Anirudh Pradhan
We investigate the cosmic acceleration and the evolution of dark energy across the cosmological constant boundary in universal extra dimensions UED. We adopt an empirical approach…
GalWeight Application: A publicly-available catalog of dynamical parameters of 1,800 galaxy clusters from SDSS-DR13, ()
Mohamed H. Abdullah, Gillian Wilson, Anatoly Klypin +3
Utilizing the SDSS-DR13 spectroscopic dataset, we create a new publicly-available catalog of 1,800 galaxy clusters (GalWeight cluster catalog, ) and a correspon…
Kinematics and Velocity Ellipsoid of Halo Red Giants
Mohamed I. Nouh, Waleed H. Elsanhoury
In the present paper, we aim to determine the kinematical properties, velocity ellipsoid, and Oort constants using a sample of halo red giants. The study is based mainly on the spa…
First Results of Arar-Magnetometer Station in Saudi Arabia
Moqbil S. Alenazi, Ayman Mahrous, Ibrahim Fathy +6
This paper presents the first results of a new Arar-magnetometer station located (Geographic Coordinates: 30 58.5 N, 41 2.3 E) at Northern Border University in Saudi Arabia. The ge…
First space and kinematical analysis of newly discovered southern UFMGs clusters with Gaia
W. H. Elsanhoury
The work on the kinematical parameters and spatial shape structure have been performed with Gaia DR2 astrometry data of the new recently southern discovered open clusters; UFMG 1,…
The 3XMM/SDSS Stripe 82 Galaxy Cluster Survey II. X-ray and optical properties of the cluster sample
Ali Takey, Florence Durret, Isabel Márquez +3
We present X-ray and optical properties of the optically confirmed galaxy cluster sample from the 3XMM/SDSS Stripe 82 cluster survey. The sample includes 54 galaxy clusters in the…
A Cyclic Universe With Varying Cosmological Constant in gravity
Nasr Ahmed, Sultan Z. Alamri
A new kind of evolution for cyclic models in which the Hubble parameter oscillates and keeps positive has been explored in a specific gravity reconstruction. A singularity…
Cosmological determination to the values of the prefactors in the logarithmic corrected entropy-area relation
Nasr Ahmed, Sultan Z. Alamri
In this paper, we continue investigating the possible values of the pre-factors and in the logarithmic corrected entropy-area relation based on cosmological stability argum…
Long-term Spot Stability in the Post-common-envelope Binary QS Vir
Olivera Latković, Attila Cséki, Gojko Djurašević +3
We observed the post-common-envelope eclipsing binary with a white dwarf component, QS Vir, using the 1.88 m telescope of Kotammia Observatory in Egypt. The new observations were a…
Ricci-Gauss-Bonnet holographic dark energy in Chern-Simons modified gravity: A flat FLRW quintessence-dominated universe
Nasr Ahmed
We discuss the recently suggested Ricci-Gauss-Bonnet holographic dark energy in Chern-Simons modified gravity. We have tested some general forms of the scale factor , and use…