A new model emphasizing secondary mass features and pairing transitions improves spectral siren H0 constraints by ~30% using 142 GW events from GWTC-4.0.
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Dynamics of dark energy
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A van der Waals-inspired modification to general relativity renders the gravitational coupling dynamical, providing a mechanism to avoid Big Bang and black hole singularities.
Claims a new metric unifying Kerr black holes with FLRW cosmology for arbitrary scale factor a(t), predicting stationary mass and contracting ergosphere and horizon.
Different choices of dynamical variables in cosmological systems affect the extractable information from Friedmann equations, illustrated by revisiting standard models and quintessence with exponential potentials using new variables.
Scalar-field reconstruction of Ricci-Gauss-Bonnet dark energy in Hořava-Lifshitz cosmology produces an equation of state that transitions smoothly to de Sitter-like behavior at late times, with stable sound speed and non-negative total entropy change at the apparent horizon.
A spinor-field Modified Chaplygin Gas model in Kantowski-Sachs spacetime yields H0 of 67-68 km/s/Mpc, late-time isotropy, q0 of -0.49, and a better AIC fit than LambdaCDM.
In f(T) gravity with Gong-Zhang EoS parametrization, the fitted model shows transient acceleration followed by future deceleration and satisfies thermodynamic consistency.
Dynamical systems analysis in f(R,L_m,T) gravity identifies stable critical points that describe different evolutionary phases of the Universe.
citing papers explorer
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Secondary-Mass Features improve Spectral-Siren $H_0$ Constraints
A new model emphasizing secondary mass features and pairing transitions improves spectral siren H0 constraints by ~30% using 142 GW events from GWTC-4.0.
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Van der Waals Gravity Theory
A van der Waals-inspired modification to general relativity renders the gravitational coupling dynamical, providing a mechanism to avoid Big Bang and black hole singularities.
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Gravitational Field of a Rotating Mass on an Expanding Universe
Claims a new metric unifying Kerr black holes with FLRW cosmology for arbitrary scale factor a(t), predicting stationary mass and contracting ergosphere and horizon.
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The choice of variables in cosmological dynamical systems
Different choices of dynamical variables in cosmological systems affect the extractable information from Friedmann equations, illustrated by revisiting standard models and quintessence with exponential potentials using new variables.
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Scalar-Field Reconstruction of Ricci--Gauss--Bonnet Dark Energy in Ho\v{r}ava--Lifshitz Cosmology
Scalar-field reconstruction of Ricci-Gauss-Bonnet dark energy in Hořava-Lifshitz cosmology produces an equation of state that transitions smoothly to de Sitter-like behavior at late times, with stable sound speed and non-negative total entropy change at the apparent horizon.
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Testing an anisotropic spinor field--based Modified Chaplygin Gas model in Kantowski--Sachs spacetime with observational constraints
A spinor-field Modified Chaplygin Gas model in Kantowski-Sachs spacetime yields H0 of 67-68 km/s/Mpc, late-time isotropy, q0 of -0.49, and a better AIC fit than LambdaCDM.
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Transiently accelerating cosmological model with Gong-Zhang parametrization in $f(T)$ teleparallel gravity
In f(T) gravity with Gong-Zhang EoS parametrization, the fitted model shows transient acceleration followed by future deceleration and satisfies thermodynamic consistency.
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Evolutionary Phase of Universe in $f(R,L_m,T)$ Gravity: The Dynamical System Analysis
Dynamical systems analysis in f(R,L_m,T) gravity identifies stable critical points that describe different evolutionary phases of the Universe.
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