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Resolved Structure of the Arp 220 Nuclei at λ ≈ 3 mm
We analyze 3 mm emission of the ultraluminous infrared galaxy Arp 220 for spatially-resolved structure and spectral properties of the merger nuclei. ALMA archival data at 0.05" resolution are used for extensive visibility fitting and deep imaging of continuum emission. The data are fitted well with two concentric components for each nucleus, such as two Gaussians or one Gaussian plus one exponential disk. The larger components in individual nuclei are similar in shape and extent, 100-150 pc, todoi:10.3847/1538-4357/aa8f4b fatcat:bu5kkp46hjdh7cv2rkzpr64wzy