SIMBAD references

Starting from a sample of 24 µm sources in the Extended Groth Strip, we use 3.6-8 µm color criteria to select ultraluminous infrared galaxies (ULIRGs) at z ∼ 2. Spectroscopy from 20-38 µm of 14 objects verifies their nature and gives their redshifts. Multi-wavelength data for these objects imply stellar masses >10¹¹ M_☉ and star formation rates ≥ 410 M_☉/yr. Four objects of this sample observed at 1.6 µm (rest-frame visible) with Hubble Space Telescope/WFC3 show diverse morphologies, suggesting that multiple formation processes create ULIRGs. Of the 14 objects, 4 show signs of active galactic nuclei, but the luminosity appears to be dominated by star formation in all cases.