Diffuse interstellar bands as dust indicators: The contribution from 3D maps

Open Access

Fig. 5

Images of 862 nm ${D I B}_{norm}^{862}$ $\[\mathrm{DIB}_{\text {norm }}^{862}\]$ (middle) and the two estimates of the dust opacity spectral index β (top: Planck Collaboration Int. XLVIII 2016 and bottom: Casandjian et al. 2022). There are strong similarities, again with notable exceptions in high-extinction regions, mainly the Aquila rift area (black ellipse).

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