Fig. 17.
Left: Balmer decrement measurements (purple to red) and lower limits (grey to black) across the MUSE FOV. Hα and Hβ fluxes are derived from the fitted total line profiles; 3σ upper limits for the Hβ flux are used to derive Balmer decrement lower limits. Right: E(B − V)gas map of Arp220, derived from the Hα/Hβ ratios in the top-left panel using the CCM extinction law.
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