Fig. 10

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Calculated ζ2 toward HMPOs (brown), HMCs (orange), and UCH IIs (green). Black triangles represent CRIR from IRDC G28.37+00.07, which are taken from Entekhabi et al. (2022). The cyan star represents CRIR from prestellar core L1544, which is taken from Redaelli et al. (2021). The black solid, dashed, and dash-dotted curves denote the theoretical CR attenuation models ℒ, ℋ, and 𝒰 by Padovani et al. (2024).
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