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arXiv · 1110.2493

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

Mark Lacy·Andreea O. Petric·Alejo Martinez-Sansigre·Susan E. Ridgway·Anna Sajina·Tanya Urrutia·Duncan 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 <~10^10 solar masses, several times less than those of luminous submillimeter-detected galaxies (SMGs) at comparable redshifts. Their near-infrared spectral energy distributions, however, imply that these galaxies have high stellar masses (~10^11-12 solar masses). The relatively small reservoirs of molecular gas and low dust masses are consistent with them being relatively mature systems at high-z.

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Mark Lacy, Andreea O. Petric, Alejo Martinez-Sansigre, Susan E. Ridgway, Anna Sajina, Tanya Urrutia, Duncan Farrah. 2011-10-11. The stellar, molecular gas and dust content of the host galaxies of two z~2.8 dust obscured quasars. https://doi.org/10.1088/0004-6256%2F142%2F6%2F196

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