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
12 papers · 1 filter
Discovery and description of two young open clusters in the primordial group of NGC 6871
Juan Casado, Yasser Hendy
A primordial group of open clusters containing NGC 6871 is confirmed and described through Gaia DR3 data and the previous literature. It is a star-forming complex containing at lea…
Morphology driven evolution of barred galaxies in OMEGAWINGS Clusters
Amira A. Tawfeek, Bernardo Cervantes Sodi, Jacopo Fritz +6
We present a study of barred galaxies in the cluster environment, exploiting a sample of galaxies drawn from the extended WIde-field Nearby Galaxy-cluster Survey (OmegaWINGS) that…
Constraining Cosmological Parameters using the Cluster Mass-Richness Relation
Mohamed H. Abdullah, Gillian Wilson, Anatoly Klypin +1
The cluster mass-richness relation (MRR) is an observationally efficient and potentially powerful cosmological tool for constraining the mean matter density of the universe and the…
The Uchuu-UniverseMachine dataset: Galaxies in and around Clusters
Han Aung, Daisuke Nagai, Anatoly Klypin +7
We present the public data release of the Uchuu-UM galaxy catalogues by applying the UniverseMachine algorithm to assign galaxies to the dark matter halos in the Uchuu -body cos…
Spectroscopic and Photometric Study of the new Scuti Star ASAS J063309+1810.8
Mohamed I. Nouh, Mohamed Abdel-Sabour, Ahmed Shokry +3
We present BVR observations and low-resolution spectra collected by the Kottamia Astronomical Observatory 1.88 m telescope (KAO) for the new pulsating star ASAS J063309+1810.8 (her…
The principal astrophysical parameters of the open clusters Gulliver 18 and Gulliver 58 determined using Gaia EDR3 data
Ashraf Tadross, Eslam Elhosseiny
A photometric and astrometric study of the two open star clusters Gulliver 18 and Gulliver 58 was carried out for the first time using the early third data release of the Gaia spac…
Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in gravity
Vinod Kumar Bhardwaj, Anirudh Pradhan, Nasr Ahmed +1
Modeling of matter bounce in gravity has been presented with no violation of the null energy condition. Only a closed universe with negative pressure is allowed in good ag…
Spectral Behaviour and Flaring Activity of II Peg in the Ultraviolet
M. R Sanad
We have investigated the spectral behaviour of II Peg binary system in the ultraviolet band by using International Ultraviolet Explorer observations over fifteen years. The ultravi…
Some cosmological features of 4D Gauss-Bonnet gravity with varying cosmological constant
Nasr Ahmed, Ajab A. Alfreedi, Alaa A. Alzulaibani
We explore some cosmological features of the newly suggested 4D Gauss-Bonnet gravity through two different models assuming a varying cosmological constant. Observational constraint…
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…
Photometric and Spectroscopic Analysis of the SX Phe Star BL Cam
Mohamed Abdel-Sabour, Mohamed I. Nouh, Ahmed Shokry +5
In the present paper, we report the photometric and spectroscopic observations obtained by the 1.88 m telescope at the Kottamia astronomical observatory of the pulsating star BL Ca…
A comprehensive photometric and kinematical characteristic of the newly discovered QCs clusters with Gaia EDR3
W. H. Elsanhoury, Magdy Y. Amin, A. A. Haroon +1
This study reports the first comprehensive astrometric, photometric and kinematical analysis of four newly discovered open clusters; namely QC1, QC2, QC3, and QC4, using astrometri…