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<i>Spitzer</i>Detection of Polycyclic Aromatic Hydrocarbon and Silicate Dust Features in the Mid‐Infrared Spectra of<i>z</i>∼ 2 Ultraluminous Infrared Galaxies
We report the initial results from a Spitzer GO-1 program to obtain low-resolution, mid-infrared spectra of infrared luminous galaxies at z ~ 1-2. This paper presents the spectra of eight sources observed with the Spitzer Infrared Spectrograph (IRS). Of the eight spectra, six have mid-IR spectral features, either emission from …