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Jul 03, 2024Open    Access

On the Convective Mechanism of Fluctuations in the Luminosity of Semi-Controlled Variable Stars

Boris Lazarevinch Ikhlov
The mechanisms of changing the luminosity of various types of stars are considered. The problem of supercritical convection in an infinite plane layer is solved in the approximation of low velocities, the plane equation of which coincides with the equation for high velocities, a stationary solution is obtained. It is shown that there minimum two mechanisms of luminosity oscillations in stars: Supercritical convection in the upper layers of the star generates oscillatory changes in temperature an...
Open Access Library J.   Vol.11, 2024
Doi:10.4236/oalib.1108528


Jan 31, 2024Open    Access

General Relativity Can Explain Dark Matter without Exotic Matter

Stéphane Le Corre
Dark matter is one of the most important mystery in astrophysics. Several explanations have been proposed. The most accepted one is the existence of an exotic matter, exotic because unsensitive to electromagnetism, unlike baryonic matter. One problem is that except on scales beyond the galaxies, no new matter is needed. This is an ad hoc addition only for large structures of the universe. But then another problem is that this added matter that should concern large astrophysical structures is not...
Open Access Library J.   Vol.11, 2024
Doi:10.4236/oalib.1111149


Nov 28, 2023Open    Access

MOND: An Approximation of a Particular Solution of Linearized General Relativity

Stéphane Le Corre
It has been demonstrated that dark matter (DM) can theoretically be completely explained by a natural effect of General Relativity (GR) without exotic matter, the Lense-Thirring effect that exists exclusively in GR and that would be due to the clusters of galaxies. In this study, we show that this explanation of DM leads to a modelization that can be interpreted as MOND-based theories. More concretely, we retrieve from GR the value of MOND parameter a0~10-8cm·s-...
Open Access Library J.   Vol.10, 2023
Doi:10.4236/oalib.1110908


Oct 16, 2023Open    Access

TULLY-FISHER Law Demonstrated by General Relativity and Dark Matter

Stéphane Le Corre
The Tully-Fisher law M ∝ vα is an empirical relationship between the mass of a galaxy and its asymptotic rotation velocity. The purpose of this research is to demonstrate that this relation can be theoretically obtained in General Relativity (GR) with a particular solution of dark matter (DM) in very good agreement with the observations. Several years ago, it was demonstrated that DM can theoretically be completely explained by a natural effect of GR without exotic matter, ...
Open Access Library J.   Vol.10, 2023
Doi:10.4236/oalib.1110714


Jul 27, 2023Open    Access

An Effect Exclusively Generated by General Relativity Could Explain Dark Matter

Stéphane Le Corre
It has been demonstrated that dark matter can theoretically be completely explained by a natural effect of General Relativity (GR) without exotic matter or exotic correction as MOND, an effect that exists exclusively in GR and which is traditionally considered negligible. We give the values of this effect necessary to fully explain the dark matter component. In the framework of GR, this solution is mathematically as valid and legitimate as the hypothesis of an “ad hoc” addition of exotic materia...
Open Access Library J.   Vol.10, 2023
Doi:10.4236/oalib.1110449


Nov 29, 2022Open    Access

Negative Gravitational Mass: A Perfect Solution for Primordial Inflation and Dark Energy in the Early Universe

Stéphane Le Corre
This paper proposes a physical solution to primordial inflation. It occurs by a scalar field with a slow-rolling period. It starts at the phase transition giving rise to the gravitational interaction at time ti ~ 10-44 s, Planck time, and ends at time tf ~ 10-42 s (or more exactly about 70 e-folds later). This scalar field is carried by a primordial particle of inert mass mp ~ 1...
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1109473


Jun 28, 2022Open    Access

The Application of ENG (Extended Newtonian Gravitation) to Wide Binary Systems

Barbaro Quintero-Leyva
An Extended Newtonian Gravitation (ENG) model previously developed by the author for galaxies and galaxy clusters was applied to wide binary systems where an apparent missing mass problem was found from the Hipparcos and Gaia catalogue. The ENG model shows results consistent with the experimental values of the asymptotic velocity difference between the stars. MOND (as an inertial paradigm) failed to show its asymptotic behavior when its external field effect was considered. It had an almost Newt...
Open Access Library J.   Vol.9, 2022
Doi:10.4236/oalib.1108950


Dec 28, 2021Open    Access

Estimation of the Population of Stars in the Universe

Ignacio Pablo Traversa-Tejero
Stars are light years away, and their brightness depends on multiple variables. Starting in the 20th century, artificial satellites were launched that added to the bright bodies of the observable sky. From 26.816 satellite observations and 9.037 stars visible to the naked eye, regression models were made between brightness and distances. The existence of a visual convergence plane that receives light photons arriving with a delay, c = 299.792.458 m·s-1 was assumed. Under the principle...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1108154


Dec 17, 2021Open    Access

Law of Physics 20th-Century Scientists Overlooked (Part 7): Steady State Cosmic Structure

Conrad Ranzan
Presented is an exploration into the operation of the Universe that begins with a single assumption, an empirical proposition accepted by virtually all theorists. The article then builds on this assumption (a fundamental process of expansion) by applying and integrating three important laws of physics that 20th-century scientists overlooked—namely those detailed in Parts 1, 2, and 4 in this series of articles. They are, respectively, 1) “The velocity differential propagation of light,” which pre...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107901


Nov 18, 2021Open    Access

Study of Mass and Temperature Distribution in Clump Near the Sp1 Nebula at the Galactic Latitude 01.9°

Rajesh Shrestha, Bibek Dhungana, Bashudev Bhandari, Rajan Dev Pant
The study of the dust structure around a clump of star forming region sp1 has been performed at 01.9° latitude in the Infrared Science Archive (IRAS) map. The two different fits images of 60 μm and 100 μm are downloaded from sky view virtual observatory and a clump is selected as a study region. The flux densities at different points have been calculated using Aladin software. By analyzing two different Flexible Image Transport System (FITS) images of 60 μm and 100 μm the average temperatur...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1108052


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