The paper identifies restrictions on second-order bi-scalar-vector-tensor field equations in 4D spacetime that are variationally derivable, conserve charge, and recover Maxwell's equations when scalars are constant, while noting that a single Lagrangian cannot generate all such equations.
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ACG models embed the observationally preferred phantom-crossing dark energy behavior inside a consistent Horndeski Lagrangian and achieve data fits of similar quality to w0waCDM while being narrowed by perturbative probes.
Using simulated binary black hole mergers and neutral hydrogen maps, the radio sirens method constrains H0 to 8% precision with 3000 high-SNR events, offering a 90% improvement over standard dark siren analyses.
A two-field quintom model reproduces w0waCDM perturbation features and is mildly favored over it in Bayesian fits to BAO, CMB, and SNIa data.
Non-minimal effective scalar-tensor gravity supports early-universe bounce, inflation, and genesis while producing two Hubble values that could resolve the Hubble tension.
Reviews the Layzer-Irvine equation and discusses its prior use in dark matter-dark energy interaction and modified gravity models while suggesting future directions.
citing papers explorer
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Second-Order Bi-Scalar-Vector-Tensor Field Equations Compatible with Conservation of Charge in a Space of Four-Dimensions
The paper identifies restrictions on second-order bi-scalar-vector-tensor field equations in 4D spacetime that are variationally derivable, conserve charge, and recover Maxwell's equations when scalars are constant, while noting that a single Lagrangian cannot generate all such equations.
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Constraints on Horndeski Gravity with Phantom Crossing
ACG models embed the observationally preferred phantom-crossing dark energy behavior inside a consistent Horndeski Lagrangian and achieve data fits of similar quality to w0waCDM while being narrowed by perturbative probes.
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Radio sirens: inferring $H_0$ with binary black holes and neutral hydrogen in the era of the Einstein Telescope and the SKA Observatory
Using simulated binary black hole mergers and neutral hydrogen maps, the radio sirens method constrains H0 to 8% precision with 3000 high-SNR events, offering a 90% improvement over standard dark siren analyses.
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Quintom Model Perturbations
A two-field quintom model reproduces w0waCDM perturbation features and is mildly favored over it in Bayesian fits to BAO, CMB, and SNIa data.
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Non-minimal Effective Scalar-Tensor Gravity in the Early Universe
Non-minimal effective scalar-tensor gravity supports early-universe bounce, inflation, and genesis while producing two Hubble values that could resolve the Hubble tension.
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Testing the Dark Universe through the Layzer-Irvine Equation
Reviews the Layzer-Irvine equation and discusses its prior use in dark matter-dark energy interaction and modified gravity models while suggesting future directions.
- Robustness of Starobinsky inflation in a minimal two-field scalar-tensor completion