Infrared galaxies as a research area focuses on galaxies whose emission is dominated by infrared radiation, typically arising from dust-reprocessed starlight and, in some cases, active galactic nuclei (AGN). This field investigates the physical conditions of interstellar dust, star-formation rates and efficiencies, obscured starburst activity, and the role of dust-enshrouded AGN in galaxy evolution. Studies use multiwavelength observations, spectral energy distribution modeling, and infrared spectroscopy to probe heavily obscured regions inaccessible at optical wavelengths, constrain the cosmic star-formation history, and understand feedback, gas accretion, and merger-driven processes in both local and high-redshift infrared-luminous galaxy populations.
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