Interacting galaxies as a research area focuses on the dynamical, hydrodynamical, and radiative processes that occur when galaxies experience mutual gravitational influence, including fly-bys, minor and major mergers, and tidal encounters. Studies combine N-body and hydrodynamical simulations with multiwavelength observations to investigate tidal tails, bridges, bars, and induced starbursts, as well as gas inflows, feedback, and morphological transformation. This field is central to understanding hierarchical structure formation, the build-up of stellar mass, triggering and regulation of active galactic nuclei, and environmental effects on galaxy evolution across cosmic time, often using statistically defined samples from large surveys alongside detailed case studies.
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