Zobrazeno 1 - 10
of 54
pro vyhledávání: '"MOHAMED I. NOUH"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract This paper presents new relativistic composite polytropic models for compact stars by simultaneously solving Einstein field equations with the polytropic state equation to simulate the spherically symmetric, static matter distribution. Using
Externí odkaz:
https://doaj.org/article/f446de745696458eaf63615921a94272
Autor:
Mohamed S. Aboueisha, Mohamed I. Nouh, Emad A. -B. Abdel-Salam, Tarek M. Kamel, M. M. Beheary, Kamel A. K. Gadallah
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-26 (2023)
Abstract Many stellar configurations, including white dwarfs, neutron stars, black holes, supermassive stars, and star clusters, rely on relativistic effects. The Tolman–Oppenheimer–Volkoff (TOV) equation of the polytropic gas sphere is ultimatel
Externí odkaz:
https://doaj.org/article/1836ea902e684bb08453a41bdbf82b96
Publikováno v:
Scientific African, Vol 20, Iss , Pp e01696- (2023)
Over the last few decades, artificial neural networks (ANN) have played an essential role in many areas of human activity and have found application in many branches of natural sciences. ANNs have been widely used to tackle problems related to linear
Externí odkaz:
https://doaj.org/article/f292ecef2f0a4ec2bbe2ac6cbced8afa
Publikováno v:
Advances in Astronomy, Vol 2021 (2021)
The helium burning phase represents the second stage that the star used to consume nuclear fuel in its interior. In this stage, the three elements, carbon, oxygen, and neon, are synthesized. The present paper is twofold: firstly, it develops an analy
Externí odkaz:
https://doaj.org/article/8bd51de017b944e5999f250202f02d95
Publikováno v:
Scientific African, Vol 8, Iss , Pp e00386- (2020)
Lane-Emden equations have many applications in physical science and so make great attention to researchers. In most cases there is are no exact solutions to these equations and only approximate solutions could be performed. This paper introduces anal
Externí odkaz:
https://doaj.org/article/0c325cd7f51a49768cd6878665e92c32
Publikováno v:
Journal of Science and Arts. 21:919-934
In this paper, the hyperbolic tangent function method is applied for constructing exact solutions for space-time conformal fractional Burgers’ equation. Furthermore, the space-time conformal fractional Burgers’ equation is tested for the Painlev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13a863ea7d15a14c1929808e91502bd8
https://doi.org/10.46939/j.sci.arts-21.4-a04
https://doi.org/10.46939/j.sci.arts-21.4-a04
Autor:
Mohamed I. Nouh, Mohamed Abdel-Sabour, Ahmed Shokry, Gamal M. Hamed, Diaa A. Fouda, Ali Takey
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 (hereafter it will be called ASAS06+18). The photometric analysis revealed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::724a1151d752da755f3faa545f88802b
http://arxiv.org/abs/2208.07429
http://arxiv.org/abs/2208.07429
Publikováno v:
Revista Mexicana de Astronomía y Astrofísica. 57:189-198
The isothermal gas sphere is a particular type of Lane-Emden equation and is used widely to model many problems in astrophysics like stars, star clusters, and the formation of galaxies. In this paper, we present a computational scheme to simulate the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a6abe17e9790473027bd888f949d4b5
https://doi.org/10.22201/ia.01851101p.2021.57.01.14
https://doi.org/10.22201/ia.01851101p.2021.57.01.14
Publikováno v:
NRIAG Journal of Astronomy and Geophysics. 10:416-422
In the present paper, analysis of the BVR photometric observations using the 1.88 m telescope of Kottamia Astronomical Observatory (Egypt) is reported. The fundamental mode with many harmonics is d...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b956d99b8c798cc656a7a72752489c58
https://doi.org/10.1080/20909977.2021.2000794
https://doi.org/10.1080/20909977.2021.2000794
Publikováno v:
NRIAG Journal of Astronomy and Geophysics. 10:23-34
Innovation in the ground and space-based instruments has taken us into a new age of spectroscopy, in which a large amount of stellar content is becoming available. So, automatic classification of s...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46e2d96bb01a96c453c334cef078cd6a
https://doi.org/10.1080/20909977.2020.1853012
https://doi.org/10.1080/20909977.2020.1853012