Image Details
Caption: Figure 2.
Ratio of ΣD versus ΣH: ratio of extinction and emission-based dust-mass surface densities (﹩{{\rm{\Sigma }}}_{D,\,\mathrm{FIR}}/{{\rm{\Sigma }}}_{D,\,{A}_{V}}﹩) versus total hydrogen surface density (ΣH), for 208 sight lines with AV = 0.6–2.0 mag, convolved to a resolution of 60″ (15 pc). The y-axis is proportional to κFIR/κV.
© 2026. The Author(s). Published by the American Astronomical Society.