Astrophysics

2506 Submissions

[8] ai.viXra.org:2506.0111 [pdf] submitted on 2025-06-24 22:46:08

Hubble Expansion Model (H-model): Thermodynamic Derivation and Cosmological Validation

Authors: Enver Torlakovic
Comments: 4 Pages.

The Hubble Expansion Model (H-model), a core component of the Vacuum Energy Quanta Field (VEQF) Theory, redefines cosmic expansion as an entropy-driven thermodynamic process within a quantized space lattice. By integrating vacuum energy fluctuations, entropy, and a drift rate, the model predicts the Hubble parameter (( H_{text{VEQF}} )) without reliance on a time-based framework. Validated against 753 Type Ia supernovae from the Pantheon+SH0ES catalog (( z = 0.2008—2.2614 )) and 500 quasars from the SDSS DR16 catalog (( z = 0.241—2.299 )), the model achieves a drift rate range of ( 2.18 times 10^{-18} ) to ( 2.36 times 10^{-18} , text{s}^{-1} ) with zero outliers above ( 2.5 times 10^{-18} , text{s}^{-1} ) in quasar data. The H-model aligns closely with observed ( H_0 = 2.27 times 10^{-18} , text{s}^{-1} ) (70 km/s/Mpc) and Planck (( 2.18 times 10^{-18} , text{s}^{-1} )), offering insights into the Hubble Tension through low-redshift systematic errors. This paper presents the thermodynamic derivation of the H-model, its cosmological validation, and its implications for a lattice-based understanding of the universe’s expansion.
Category: Astrophysics

[7] ai.viXra.org:2506.0109 [pdf] submitted on 2025-06-24 22:36:25

Why do Planets Spin? Stellar Metamorphosis Versus the Nebular Hypothesis

Authors: Jeffrey Joseph Wolynski
Comments: 4 Pages. (Note by ai.viXra.org Admin: Please cite and list scientific references)

The origin of axial angular momentum (why planets spin) is another fundamental difference between the Nebular Hypothesis and Stellar Metamorphosis (SM). Each theory has a different starting point for what planets are, and therefore, how and why they rotate.
Category: Astrophysics

[6] ai.viXra.org:2506.0105 [pdf] submitted on 2025-06-23 21:00:56

Gravity Emergence Model (GEM): Enthalpy-Based Derivation and Thermodynamic Insights

Authors: Enver Torlakovic
Comments: 9 Pages. AI collaborators - Grok - xAI and Qwen (Tongyi Lab); numerical calculations Python script is available on request. All rights reserved.

The Gravity Emergence Model (GEM), a cornerstone of the Vacuum Energy Quanta Field (VEQF)Theory, redefines gravitational binding as an entropy-driven thermodynamic process within a quantizedenergy lattice. By integrating enthalpy, entropy, and gravitational potential, GEM models the bindingenergy of celestial bodies, driven by Energy Density Gradients (EDG) and consistent withBoltzmann’s entropy law. The entropy change, scaled by the negative gravitationalpotential, reflects increased order during coalescence, with positive feedback amplifyingmass concentration. Calibrated to astrophysical formation temperatures, GEM achieves near-unityalignment with General Relativity binding energies (discrepancy ratios ~1.00019) across rocky, gaseous,and icy bodies. This model offers a novel thermodynamic perspective on universal structure formation,with implications for gravitational physics and cosmology.
Category: Astrophysics

[5] ai.viXra.org:2506.0090 [pdf] replaced on 2025-09-08 00:36:43

Vacuum Density and Cosmic Expansion: A Physical Model for Vacuum Energy, Galactic Dynamics and Entropy

Authors: André J. H. Kamminga
Comments: 22 Pages.

The cosmological constant problem reflects the enormous gap between naive quantum estimates of vacuum energy and the small but nonzero value inferred from observations. In earlier work [2, 3, 4] we introduced phase-dependent models in which the vacuum spectrum is bounded by confinement at the QCD scale and suppressed at low energies. Building on that foundation, this paper presents the Quantum Energy Vacuum (QEV) model, where thespectrum is explicitly constrained by two natural cutoffs: QCD confinement in the ultravioletand thermal suppression near T ≈ 34K in the infrared. This dual mechanism reduces thezero-point energy by more than forty orders of magnitude and leaves a residual densitywhich, under the influence of four physical components (entropic, thermal, hadronic, andNewtonian), is consistent with cosmological data.The QEV model reproduces the observed expansion history without a fundamental cosmologicalconstant and explains flat galactic rotation curves through entropic, thermal, and hadronic contributions, without invoking dark matter halos. High-precision cosmological observations, including CMB measurements, Pantheon+ supernovae, and cosmic chronometers, provide the testing ground for this approach. Together, these results suggest that cosmic acceleration and galactic dynamics may both emerge from a bounded vacuum framework, pointing to the vacuum as an active and structured medium rather than a passive background.
Category: Astrophysics

[4] ai.viXra.org:2506.0082 [pdf] submitted on 2025-06-19 21:21:40

Investigating the Cosmic Repulsion Principle: A Foundational Theory for Gravity, Galaxy Dynamics, and Cosmology"

Authors: Rohit Singh Roy
Comments: 90 Pages. Disributed under CC-BY 4.0

This work presents the Cosmic Repulsion Principle (CRP) as a new theoretical and empirical framework for understanding gravitation and cosmic structure. CRP introduces a density-dependent repulsive component to the gravitational interaction, offering a physically motivated alternative to dark matter and dark energy. The theory is grounded in classical, relativistic, and thermodynamic foundations, and is formulated to complement — and in some cases challenge — the predictions of General Relativity and ΛCDM.The thesis develops the mathematical structure of CRP, deriving its modified Poisson and Friedmann equations, and applies it to astrophysical phenomena such as galaxy rotation curves, gravitational lensing, CMB power spectra, and large-scale structure formation. Using real-world datasets from the SPARC catalog, the CRP model is empirically tested through MCMC parameter estimation and Bayesian model comparison, showing competitive or superior fits compared to MOND and ΛCDM with fewer free parameters.Beyond astrophysics, the framework integrates concepts from vacuum thermodynamics, quantum field theory, and entropy-driven gravity, aiming to provide a stepping stone toward a deeper understanding of gravitational interactions. Visual figures, comparison plots, and theoretical predictions are included throughout. This 90-page version serves as a condensed, yet complete, foundation for presenting CRP as a candidate for the next-generation theory of gravity and cosmology.
Category: Astrophysics

[3] ai.viXra.org:2506.0078 [pdf] submitted on 2025-06-18 21:03:22

GETA Framework - Gradient Entropy Theory of Asymmetry

Authors: Vivek Kumar
Comments: 29 Pages. https://doi.org/10.5281/zenodo.15690203 (Note by ai.viXra.org Admin: Please don't name the title etc with the author's name))

This work originates from a time-gated thought experiment in which entropy asymmetries evolve in the absence of physical boundaries. In an expanding, collisionless medium, no explicit confinement is required for gradients to emerge, allowing entropy to organize into structured spatial distributions over time. I formalize this behavior by modeling a scalar entropy potential field whose gradient defines a conservative force. The resulting framework permits early structure formation without invoking fine-tuned initial conditions or non-gravitational interactions. To characterize this emergent force, I derive its form from a Lagrangian formulation that incorporates entropy dynamics under coarse-grained evolution. The mathematical treatment leads to a finite-range, time-asymmetric force field compatible with large-scale cosmological behavior. Simulations confirm that this force arises spontaneously under entropy-separating conditions and can drive acceleration with out external potentials. These results motivate the investigation of its role in cosmic seeding, stream dynamics, and galactic structure, particularly in synergy with gravitational evolution.
Category: Astrophysics

[2] ai.viXra.org:2506.0056 [pdf] submitted on 2025-06-14 23:39:55

Structure Formation via Passive Entropy Gradients in an Expanding Collisionless Dark Matter Universe

Authors: Vivek Kumar
Comments: 6 Pages. https://doi.org/10.5281/zenodo.15659846

I introduce and validate a novel mechanism of cosmic structure formation based on passive entropy gradients in a collisionless expanding universe. Unlike standard models that rely on non-linear gravitational collapse or feedback-based entropy sorting, this framework employs a one-time, pre-timed gating of particle velocities in an expanding medium. This paper completes a trilogy of investigations—beginning with the conceptual framework, followed by numerical validation—and now presents the full dynamical integration of entropy perturbation terms into perturbative cosmology. I demonstrate how passive separation can seed realistic structure growth, potentially paralleling or enhancing the explanatory power of standard cosmological models. Implications for dark matter thermodynamics and non-equilibrium cosmology are discussed.
Category: Astrophysics

[1] ai.viXra.org:2506.0041 [pdf] submitted on 2025-06-09 20:58:02

Bounded Vacuum Energy: A Spectral Approach to Light, Information, and Spacetime

Authors: A. J. H. Kamminga
Comments: 5 Pages.

This article presents a physically motivated limitation of vacuum energy, derived from the spectral properties of photons as information carriers. The vacuum is proposed to support only meaningful electromagnetic fluctuations within a frequency window bounded by thermal effects on the lower end and QCD-related confinement on the upper end. Within these spectral limits, a physically meaningful information field emerges, governed by the causal structure of spacetime. In combination with the theoretical foundation provided in the paper "Vacuum Energy with Natural Bounds", this approach offers a potential solution to the cosmological constant problem without fine-tuning, and integrates thermodynamic, relativistic, and quantum mechanical principles into a unified framework.
Category: Astrophysics