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• W4385214967 abstract "A gravitational anomaly is found at weak gravitational acceleration $g_{rm{N}} < 10^{-9}$ m s$^{-2}$ from analyses of the dynamics of wide binary stars selected from the Gaia DR3 database that have accurate distances, proper motions, and reliably inferred stellar masses. Implicit high-order multiplicities are required and the multiplicity fraction is calibrated so that binary internal motions agree statistically with Newtonian dynamics at a high enough acceleration of $10^{-8}$ m s$^{-2}$. The observed sky-projected motions and separation are deprojected to the three-dimensional relative velocity $v$ and separation $r$ through a Monte Carlo method, and a statistical relation between the Newtonian acceleration $g_{rm{N}} equiv GM/r^2$ (where $M$ is the total mass of the binary system) and a kinematic acceleration $g equiv v^2/r$ is compared with the corresponding relation predicted by Newtonian dynamics. The empirical acceleration relation at $< 10^{-9}$ m s$^{-2}$ systematically deviates from the Newtonian expectation. A gravitational anomaly parameter $delta_{rm{obs-newt}}$ between the observed acceleration at $g_{rm{N}}$ and the Newtonian prediction is measured to be: $delta_{rm{obs-newt}}= 0.034pm 0.007$ and $0.109pm 0.013$ at $g_{rm{N}}approx10^{-8.91}$ and $10^{-10.15}$ m s$^{-2}$, from the main sample of 26,615 wide binaries within 200 pc. These two deviations in the same direction represent a $10sigma$ significance. The deviation represents a direct evidence for the breakdown of standard gravity at weak acceleration. At $g_{rm{N}}=10^{-10.15}$ m s$^{-2}$, the observed to Newton predicted acceleration ratio is $g_{rm{obs}}/g_{rm{pred}}=10^{sqrt{2}delta_{rm{obs-newt}}}=1.43pm 0.06$. This systematic deviation agrees with the boost factor that the AQUAL theory predicts for kinematic accelerations in circular orbits under the Galactic external field." @default.
• W4385214967 created "2023-07-25" @default.
• W4385214967 creator A5048976916 @default.
• W4385214967 date "2023-07-24" @default.
• W4385214967 modified "2023-10-16" @default.
• W4385214967 title "Breakdown of the Newton–Einstein Standard Gravity at Low Acceleration in Internal Dynamics of Wide Binary Stars" @default.
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• W4385214967 doi "https://doi.org/10.3847/1538-4357/ace101" @default.
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