Temperature vs. depth in the simulated cloud for AGN and SF models, for a given initial density (see subcaption), three ζ_CR values, 10⁻¹⁴ s⁻¹ (solid line), 10⁻¹³ s⁻¹ (dash-dotted), and 10⁻¹² s⁻¹ (dotted), and two log U values of −3.0 (green) and −2.0 (blue). The teal-shaded area indicates the approximate region where CR heating becomes dominant. (a) Temperature, AGN, n_H = 100 cm⁻³. (b) Temperature, AGN, n_H = 10³ cm⁻³. (c) Temperature, SF, n_H = 100 cm⁻³.