The stellar, molecular gas, and dust content of the host galaxies of two z~2.8 dust-obscured quasars

M. Lacy, A. Petric, A. Martinez-Sansigre, S. Ridgway, A. Sajina, T. Urrutia, D. Farrah

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Abstract

We present optical through radio observations of the host galaxies of two dust-obscured, luminous quasars selected in the mid-infrared, at z = 2.62 and z = 2.99, including a search for CO emission. Our limits on the CO luminosities are consistent with these objects having masses of molecular gas 1010 M ☉, several times less than those of luminous submillimeter-detected galaxies at comparable redshifts. Their near-infrared spectral energy distributions, however, imply that these galaxies have high stellar masses (~1011-1012 M ☉). The relatively small reservoirs of molecular gas and low dust masses are consistent with them being relatively mature systems at high-z.
Original languageEnglish
Pages (from-to)196
Number of pages1
JournalThe Astronomical Journal
Volume142
Issue number6
DOIs
Publication statusPublished - Dec 2011

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