What question did this study set out to answer?

This research aims to evaluate the persistent cold excess in the far-infrared spectrum of nearby galaxies.

February 19, 2026Open Access

Population-Level Constraints on Cold Far-Infrared Excess in Nearby Galaxies: A 500 𝝁m–Anchored Test Using GAMA DR4

Key Points

This research aims to evaluate the persistent cold excess in the far-infrared spectrum of nearby galaxies.
Applied matched-null stratified refinement for analysis.
Used GAMA DR4 data for evaluating population-level behaviors.
Examined high-dissipation subpopulations under conditioning.
Identified persistent cold excess at 500 μm in specific galaxy populations.
Demonstrated the applicability of deep-time structural constraints framework.

Abstract

This preprint presents a population-level infrared test using matched-null stratified refinement to evaluate persistent excess at 500 μm relative to covariate-controlled baselines.The analysis applies the deep-time structural constraints framework, specifically the thermodynamic convergence argument, to a far-infrared anchoring band using GAMA DR4 data.The work tests for stable high-dissipation subpopulations under progressive conditioning and reports the resulting persistence behavior.

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