Gas and Dust in the Extremely Red Object Ero J164502+4626.4
نویسندگان
چکیده
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 EROJ164502+4626.4 is (7± 1)× 10Kkms pc, which yields a total molecular gas mass of ∼ 6×10M⊙ . We also present a map of the 850-μm continuum emission obtained using SCUBA, from which we infer a far-IR luminosity and dust mass of LFIR ∼ 9×10 L⊙ and Md ∼ 9 × 10M⊙ . 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 EROJ164502+4626.4 is not simply a high redshift counterpart of a typical Ultra Luminous Infrared Galaxy (ULIRG). Subject headings: galaxies: structure – galaxies: individual: (EROJ164502+4626.4) – galaxies: ISM The Very Large Array (VLA) is operated by the National Radio Observatory, which is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.
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z = 1 . 44 Dusty , Ultraluminous Galaxy and Implications for Deep Sub - mm
We present new near-infrared and optical spectroscopic observations which confirm the redshift of the z = 1.44 extremely red object ERO J164502+4626.4 (object # 10 of Hu & Ridgway 1994; formerly known as ‘HR 10’ or ‘[HR94] 10’) and a Hubble Space Telescope image which reveals a reflected-S–shaped morphology at (rest–frame) nearultraviolet wavelengths. The contrast between the rest–frame far-red...
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