Population-Level Constraints on Mid-Infrared Excess in Nearby Galaxies: A WISE 12 and 22 𝜇m Anchored Test Using GAMA DR4

Key Points

• The aim is to evaluate the stability of mid-infrared excess in nearby galaxies using population-level analysis.
• Utilized WISE data at 12 and 22 μm to analyze mid-infrared signatures.
• Applied matched-null stratified refinement for data evaluation.
• Conducted convergence tests at shorter wavelengths to detect high-dissipation subpopulations.
• Persistent mid-infrared excess is influenced by covariate conditioning.
• Detection of stable high-dissipation subpopulations remains challenging.
• Results indicate variability in energy-integrated observables across the sample.