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Fig. 18

image

PACS/SPIRE color-color diagram: νL100/νL250 vs. νL250/νL500, which traces the variations of the emissivity index β. Panel distribution, symbols, and color-coding are the same as in Fig. 17. The curves give the theoretical Herschel luminosity ratios for simulated modified black bodies of fixed βeff = 1.0, 1.5, and 2.0 (drawn from Fig. 10 in Rémy-Ruyer et al. 2013).

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