Gas and Dust in the Extremely Red Object ERO J164502+4626.4
Abstract
We report the first detection of the lowest CO transition in a sub-millimetre bright galaxy and extremely red object (ERO) at z = 1.44 using the Very Large Array. The total J = 1 - 0 line luminosity of ERO J164502+4626.4 is (7+-1) x 1010 K km s-1 pc2, which yields a total molecular gas mass of ~6 x 1010 Msun. We also present a map of the 850-um continuum emission obtained using SCUBA, from which we infer a far-IR luminosity and dust mass of LFIR ~ 9 x 1012 Lsun and Md ~ 9 x 108 Msun. We find tentative evidence that the CO and sub-mm dust emission is extended over several tens of kpc. If confirmed by high-resolution imaging, this implies that ERO J164502+4626.4 is not simply a high redshift counterpart of a typical Ultra Luminous Infrared Galaxy (ULIRG).
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