390287.fig.005
Figure 5: Relative emissivity of microwave emission to 100 μm FIR emission as a function of molecular hydrogen column density, , for dark clouds. Clouds from Scaife et al. [123, 125] are shown as filled circles, LDN 1622 [116] is shown as filled stars, and LDN 1621 [128] is shown as a filled square.