The Rich JWST Spectrum of the Western Nucleus of Arp 220: Shocked Hot Core Chemistry Dominates the Inner Disk

Victorine Buiten, Paul van der Werf, Serena Viti +20

We present full 3-28 $\hat{\mathrm{I}}¼\mathrm{m}$ JWST MIRI/MRS and NIRSpec/IFU spectra of the western nucleus of Arp 220, the nearest ultraluminous infrared galaxy. This nucleus has long been s…