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| viXra.org > Astrophysics > 2312 |
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[7] viXra:2312.0166 [pdf] submitted on 2023-12-31 16:23:50
Authors: Giuseppe Cimino
Comments: 5 Pages.
An alternative hypothesis to the dark matter theory is analysed, using the Photon Universe model to give an explanation to the "missing gap" phenomenon in the rotation curves of some galaxies.
Category: Astrophysics
[6] viXra:2312.0124 [pdf] submitted on 2023-12-23 23:42:31
Authors: Fernando Salmon Iza
Comments: 6 Pages. (Correction made by viXra Admin)
We are working on concrete applications of the relativistic Schwarzschild metric to the cosmos. In this report we calculate the Gaussian curvature of space-time. The relativistic Schwarzschild metric solves Einstein's equations exactly assuming a point gravitational mass and empty space in its vicinity. This metric leads to a static and symmetric solution 2D of the mathematical equation of space-time that allows to calculate the Gaussian curvature at each point. We have calculated some curvature values and found a simple equation to calculate them which allows us to extend the results to a wider range of distances. Finally using this equation and the Birkhoff—Jebsen theorem we have studied the curvature in a homogeneous and isotropic universe with a constant energy density and obtain a value very close to zero for the curvature at any inner point of that universe.
Category: Astrophysics
[5] viXra:2312.0086 [pdf] submitted on 2023-12-16 22:23:51
Authors: Evgeny A. Novikov
Comments: 4 Pages. Accepted for publication in JHEPGC
The recently observed gravitational wave background is explained in terms of the quantum modification of the general relativity (Qmoger). Some UFO, FRB and supernova flares also can be explained in terms of Qmoger.
Category: Astrophysics
[4] viXra:2312.0067 [pdf] submitted on 2023-12-12 21:26:05
Authors: Alexis Zaganidis
Comments: 7 Pages.
In the present article, we classically derive an analytic formula of the Remnant Mass of a Quasi-Binary Black Hole. The Quasi Black Hole concept comes from a Theory Of Everything we have developed few years ago.
Category: Astrophysics
[3] viXra:2312.0059 [pdf] submitted on 2023-12-10 01:49:26
Authors: Adnan Choudhary, Abdur Rahim Choudhary
Comments: 8 Pages.
We use dark matter as a mass complement to the central galactic mass in Newton’s Universal Law of Gravity. The generalized Newtonian gravity thus obtained puts on theoretical footing many of the observations obtained only experimentally.
Category: Astrophysics
[2] viXra:2312.0012 [pdf] submitted on 2023-12-02 23:59:35
Authors: Sergo Rekhviashvili
Comments: 2 Pages.
The star emits electromagnetic waves intensely, so its motion must be different from that of the planet. Centripetal acceleration during star rotation around the galactic center and the resulted radiative friction creates a valid alternative to the dark matter concept.
Category: Astrophysics
[1] viXra:2312.0002 [pdf] replaced on 2024-01-08 23:42:44
Authors: Manuel Abarca Hernandez
Comments: 39 Pages. V3 version is focused to study the Dark matter at the disk of Milky Way using the DM by gravitation theory.
This paper develops carefully an original theory of dark matter, whose main hypothesis is that DM is generated by the own gravitational field. This work introduces the best version of the theory physical and mathematically, which has been developed and published since 2013.The hypothesis of DM by gravitation has two main consequences: the first one is that the law of DM generation has to be the same, in the halo region, for all the galaxies and the second one is that the haloes are unlimited so the total DM goes up without limit. Both properties are crucial for the success of this theory. The newness of this work regarding the previous paper, [13] Abarca,M. 2023, is the chapter 12, where it is studied the DM by gravitation theory at the disk and halo regions. The numerical method used in this chapter is a bit rough but using the rotation curve at disk and its baryonic mass profile has been possible to estimate roughly DM density at disk depending on the field. Three main conclusions have been got in this chapter.1º at the disk region, there is a clear functional dependence between DM density versus field E according a potential function DDM = Au2022E^B, although the exponent of the power is not 5/3 because the baryonic mass density is not zero in this region.2º at the halo region, the parameters A & B got with a quite rude method are similar to the ones got in chapter 11 with the analytical method. This similarity shows that this rude method may be accepted in order to study the function DM density versus a power of field as a first approximation to this law.3º Even with a method so rough it is possible to estimate the Solar DM density. The result got with that method differs only 15% regarding the current value accepted by the scientific community.To study the DM theory more in depth at the disk region it is needed to solve the Poisson equation using together the baryonic density and the DM density, but unfortunately it is required sophisticated software, however at the halo region the Poisson equation is easy to solve, as it was shown in [13] Abarca,M. 2023, chp.15. Fortunately it is the galactic halo the most important region of galaxies to study DM in Cosmology.
Category: Astrophysics
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