Gaia DR3 data shows the Milky Way bar pattern speed is biased high by 14.4 km s^{-1} kpc^{-1}, with a bias-corrected estimate of 29.3 ± 2.3 km s^{-1} kpc^{-1}.
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Large N-body galaxy simulations reveal high chaos with Lyapunov times that extrapolate to Milky Way galaxies being chaotic on timescales ≲ 0.1 Myr.
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From Gaia to GaiaNIR: II. A new view of the Milky Way bar
Gaia DR3 data shows the Milky Way bar pattern speed is biased high by 14.4 km s^{-1} kpc^{-1}, with a bias-corrected estimate of 29.3 ± 2.3 km s^{-1} kpc^{-1}.
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The exponential growth of infinitesimal perturbations in the long-term evolution of simulated galaxies
Large N-body galaxy simulations reveal high chaos with Lyapunov times that extrapolate to Milky Way galaxies being chaotic on timescales ≲ 0.1 Myr.