Dust Masses, Compositions, and Luminosities in the Nuclear Disks and the Diffuse Circumnuclear Medium of Arp 220

The research for this project was supported by NASA 16-ATP16-0004. We thank the referee for pointing out the detection of the [C II] emission in Arp 220 East, and for suggesting the discussion on the applicability of this line as a SFR tracer in heavily obscured systems. We also acknowledge helpful discussions with Jackie Fischer, Jason Glenn, and Nick Scoville.