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| viXra.org > Astrophysics > 2506 |
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[8] viXra:2506.0158 [pdf] submitted on 2025-06-29 02:19:23
Authors: Wang Yi
Comments: 13 Pages.
This study aims to verify through physical experiments whether the fluid motion laws in a water vortex system conform to Kepler's laws of planetary motion. Specifically, by quantitatively analyzing the orbital parameters of rotating spheres in the vortex, it examines the applicability of Kepler's third law (the ratio of the cube of the semi-major axis of the orbit to the square of the period is a constant) in fluid mechanics scenarios. It also explores the potential of water vortices as a macroscopic physical model for simulating the laws of celestial body motion.
Category: Astrophysics
[7] viXra:2506.0142 [pdf] submitted on 2025-06-26 02:55:36
Authors: Aarne Hall Reid
Comments: 28 Pages. (Note by viXra Admin: Please submit article written with AI assistance to ai.viXra.org)
In this paper, I propose an alternative explanation for the Hubble constant [5] based on the refractive index [35] of intergalactic and intragalactic space. Space is anything but empty. I explore how varying refractive indices affected by intergalactic plasma, intrinsic galactic properties, and gravitational lensing [17] influence light propagation and observed redshift. By analyzing galaxy-specific refractive indices and calculating the Hubble constant [5] accordingly, I present a model that aligns more consistently with observations without relying solely on cosmic expansion. This approach offers a new pathway to understanding cosmic distances and addresses discrepancies in current cosmological data. Additionally, because at the time of Einstein’s General Relativity, plasma and electromagnetic effects on gravity were not evident, I also propose other scientific works to help bridge the gap between a totally gravity driven universe and suggest a hybrid version that includes research by Donald Scott that highlights features of a plasma driven universe working in concert with gravity. Along with a simulation by Pratt and Snell for how to incorporate Einstein’s field equations into a more cohesive framework with a plasma and gravity driven universe eliminating the need for dark matter. Equally important was to make this study Available to a wider audience by incorporating an extensive definitions appendix.
Category: Astrophysics
[6] viXra:2506.0138 [pdf] submitted on 2025-06-23 20:14:43
Authors: David W. Chapman
Comments: 6 Pages.
2024YR4 is an asteroid with an estimated diameter of 53 to 67 meters that is classified as an Apollo-type (Earth-crossing) near-Earth object. As of April 2025, it is estimated to have a 4% chance of impacting the Moon on 22 December 2032 at 15:19 UTC (Universal Coordinated Time). While it is likely that the impact point will be visible to an observer on the night side of the Earth, it is not clear whether the event will be visible to the naked eye. This paper describes what is currently known about Asteroid 2024YR4, and estimates the size of the impact fireball. The estimated energy of impact is 6.8 Megatons. The conclusion is that the impact will produce a luminous cloud for a few seconds, and that this should be visible to the naked eye.
Category: Astrophysics
[5] viXra:2506.0135 [pdf] submitted on 2025-06-23 20:06:37
Authors: Iker Padilla Munoz
Comments: 10 Pages.
We show that when standard quantum vacuum fluctuations are subjected to boundary conditions imposed by a finite causal universe, specifically the region accessible since the time of recombination, bounded by the distance to the cosmic microwave back ground (CMB) at ∼45.7 billion light-years (∼8.65 × 1026 m) and assuming a discretized space structure at the Planck length scale (∼1.616 × 10−35 m), the resulting suppression of vacuum modes leads to an effective energy deficit. This deficit closely matches the observed dark energy density in the present (∼5.3 × 10−10 J/m3) and the evolution in the past for different redshifts, without introducing any free parameters or exotic new physics. The calculation builds on established physical principles such as the Casimir effect and relativistic causality. Although this article does not aim to explain dark energy, the observed numericalcoincidence suggests a possible connection between suppressed quantum vacuum fluctuations and dark-energy density.
Category: Astrophysics
[4] viXra:2506.0105 [pdf] submitted on 2025-06-19 20:35:05
Authors: Vakhtang Mchedlishvili
Comments: 8 Pages. 2 figures, 1 appendix with code.
The phenomenon of "dark matter," while a cornerstone of the standard cosmological model (ΛCDM), remains one of the most profound puzzles in modern physics due to the persistent null results in direct detection experiments. This paper presents an alternative paradigm where "dark matter" is not a new type of particle but rather an emergent gravitational effect arising from the dynamic response of the physical vacuum itself. We model the vacuum as a quantum substratum, described by a fundamental scalar field, Φ. We propose that this substratum is coupled to gravity, and its energy density is modified in the presence of baryonic matter. To test this hypothesis, we construct a mathematical model governed by a single, universal coupling constant, herein named the "Shota" constant (β_Sh), which dictates the strength of the interaction between the Φ-field and the gravitational potential of visible matter. The model is tested through numerical simulations on two astrophysically distinct galaxies: the dwarf, dark-matter-dominated UGC 128 and the massive spiral galaxy NGC 3198. The results demonstrate remarkable success. With a nearly identical value for the "Shota" constant, the model quantitatively reproduces the rotation curves of both galaxies. Crucially, it naturally explains the observed nonlinear relationship between baryonic mass and the "dark matter" effect, showing a much larger relative response in the low-acceleration regime of the dwarf galaxy. This provides a physical foundation for the empirical Baryonic Tully-Fisher Relation (BTFR). Our framework unifies the concepts of the "Quantum Substratum" and the "Gravitational Deficit Principle" into a single, predictive theory, offering a compelling new path toward resolving the dark matter puzzle without recourse to new particles.
Category: Astrophysics
[3] viXra:2506.0097 [pdf] submitted on 2025-06-18 15:04:37
Authors: E. P. J. de Haas
Comments: 14 Pages.
In this paper, we intend to replace four mysteries of galactic dynamics with one. This one mystery is introduced as a postulate: the constant Lagrangian metric as a space-time background for galactic dynamics. The four mysteries of galactic dynamics are the B-TF relation, the rotation curves, the spiral structure and SMBH-growth. Why the galactic space-time background behaves like a giant disk with directionally synchronized metronomes on it (the constant Lagrangian metric) remains an open question.
Category: Astrophysics
[2] viXra:2506.0088 [pdf] submitted on 2025-06-17 20:19:40
Authors: Eunseob Kim
Comments: 18 Pages. (Note by viXra Admin: Abstract should be labeled as such, most listed references are not cited; please submit article written with AI assistance to ai.viXra.org)
We propose an alternative formulation in which gravitational curvature, galactic rotation, and frame-dragging arise from spatial energy density gradients. In this model, mass and rotation redistribute background energy, creating structured gradients that act as physical sources of curvature.
Category: Astrophysics
[1] viXra:2506.0043 [pdf] replaced on 2025-06-18 07:07:54
Authors: Shaffery Pohl, Noten Dorsd
Comments: 04 Pages. Final and last version.
Discussed is the signature of Spacetime of the universe according to the modus of Special Relativity resp. General Relativity. This signature can be derived from a single polynomial equation, which, with zero-solutions of coordinate axes, causes the metric tensor-components of a tangential spacetime TM to the whole manifold ("Minkowski-spacetime") and its counterpart, the "Anti-Minkowski-metric" (ATM) with constant, negative metric tensorcomponents. Also the question comes clear, why the answer to the ontological meaning and sense of the universe is 42.
Category: Astrophysics
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