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• W2922303622 abstract "We track the angular momentum transfer in n-body simulations of barred galaxies by measuring torques to understand the dynamical mechanisms responsible for the evolution of the bar-disc-dark matter halo system. We find evidence for three distinct phases of barred galaxy evolution: assembly, secular growth, and steady-state equilibrium. Using a decomposition of the disc into orbital families, we track bar mass and angular momentum through time and correlate the quantities with the phases of evolution. We follow the angular momentum transfer between particles and identify the dominant torque channels. We find that the halo model mediates the assembly and growth of the bar for a high central density halo, and the outer disc mediates the assembly and growth of the bar in a low central density halo model. Both galaxies exhibit a steady-state equilibrium phase where the bar is neither lengthening nor slowing. The steady-state equilibrium results from the balance of torque between particles that are gaining and losing angular momentum. We propose observational metrics for barred galaxies that can be used to help determine the evolutionary phase of a barred galaxy, and discuss the implications of the phases for galaxy evolution as a whole." @default.
• W2922303622 created "2019-03-22" @default.
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• W2922303622 date "2019-10-12" @default.
• W2922303622 modified "2023-10-03" @default.
• W2922303622 title "Using torque to understand barred galaxy models" @default.
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• W2922303622 doi "https://doi.org/10.1093/mnras/stz2824" @default.
• W2922303622 hasPublicationYear "2019" @default.
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