High‐Resolution Mid‐Infrared Spectroscopy of Ultraluminous Infrared Galaxies
High‐Resolution Mid‐Infrared Spectroscopy of Ultraluminous Infrared Galaxies
We present R ~ 600, 10-37 μm spectra of 53 ultraluminous infrared galaxies (ULIRGs), taken using the Infrared Spectrograph on board Spitzer. The spectra show fine-structure emission lines of neon, oxygen, sulfur, silicon, argon, chlorine, iron, and phosphorous; molecular hydrogen lines, and C2H2, HCN, and OH- absorption features. We employ …