Evidence for galaxy dynamics tracing background cosmology below the de Sitter scale of acceleration

Maurice H. P. M. van Putten

doi:10.3847/1538-4357/aa88cc

paper

Evidence for galaxy dynamics tracing background cosmology below the de Sitter scale of acceleration

arXiv:1709.05944 · doi:10.3847/1538-4357/aa88cc

Abstract

Galaxy dynamics probes weak gravity at accelerations below the de Sitter scale of acceleration $a_{d S} = cH$ , where $c$ is the velocity of light and $H$ is the Hubble parameter. Low and high redshift galaxies hereby offer a novel probe of weak gravity in an evolving cosmology, satisfying $H (z) = H_{0} 1 + ω_{m} (6 z + 12 z^{2} + 12 z^{3} + 6 z^{4} + (6/5) z^{5}) / (1 + z)$ with baryonic matter content $ω_{m}$ sans tension to $H_{0}$ in surveys of the Local Universe. Galaxy rotation curves show anomalous galaxy dynamics in weak gravity $a_{N} < a_{d S}$ across a transition radius $r_t = 4.7\,\mbox{kpc}\,M_{11}^{1/2}(H_0/H)^\frac{1}{2}$ in galaxies of mass $M = 1 0^{11} M_{⊙} M_{11}$ , where $a_{N}$ is the Newtonian acceleration based on baryonic matter content. We identify this behavior with a holographic origin of inertia from entanglement entropy, that introduces a $C^{0}$ onset across $a_{N} = a_{d S}$ with asymptotic behavior described by a Milgrom parameter satisfying $a_{0} = ω_{0} /2 π$ , where $ω_{0} = 1 - q H$ is a fundamental eigenfrequency of the cosmological horizon. Extending an earlier confrontation with data covering $0.003 ≲ a_{N} / a_{d S} ≲ 1$ at redshift $z \sim 0$ in Lellie et al. (2016), the modest anomalous behavior in the Genzel et al. sample at redshifts $0.854 \leq z \leq 2.282$ is found to be mostly due to clustering $0.36 ≲ a_{N} / a_{d S} ≲ 1$ close to the $C^{0}$ onset to weak gravity and an increase of up to 65\% in $a_{0}$ .

arXiv commentto appear in ApJ

Evidence for galaxy dynamics tracing background cosmology below the de Sitter scale of acceleration

Abstract

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