%0 Generic %1 Emonts2011 %A Emonts, B. H. C. %A Feain, I. %A Mao, M. Y. %A Norris, R. P. %A Miley, G. %A Ekers, R. D. %A Villar-Martin, M. %A Rottgering, H. J. A. %A Sadler, E. M. %A Rees, G. %A Morganti, R. %A Saikia, D. J. %A Oosterloo, T. A. %A Stevens, J. B. %A Tadhunter, C. N. %D 2011 %K CO high-z %T Molecular CO(1-0) gas in the z~2 radio galaxy MRC 0152-209 %U http://arxiv.org/abs/1105.0739 %X We report the detection of molecular CO(1-0) gas in the high-z radio galaxy MRC 0152-209 (z = 1.92) with the Australia Telescope Compact Array Broadband Backend (ATCA/CABB). This is the third known detection of CO(1-0) in a high-z radio galaxy to date. CO(1-0) is the most robust tracer of the overall molecular gas content (including the wide-spread, low-density and subthermally excited component), hence observations of CO(1-0) are crucial for studying galaxy evolution in the Early Universe. We derive L'(CO) = (6.6 +- 2.0) x 10^10 K km/s pc^2 for MRC 0152-209, which is comparable to that derived from CO(1-0) observations of several high-z submillimetre and starforming BzK galaxies. The CO(1-0) traces a total molecular hydrogen mass of M(H2) = 5 x 10^10 (alpha_x/0.8) Msun. MRC 0152-209 is an infra-red bright radio galaxy, in which a large reservoir of cold molecular gas has not (yet) been depleted by star formation or radio source feedback. Its compact radio source is reliably detected at 40 GHz and has a steep spectral index of alpha = -1.3 between 1.4 and 40 GHz (4-115 GHz in the galaxy's rest-frame). MRC 0152-209 is part of an ongoing systematic ATCA/CABB survey of CO(1-0) in high-z radio galaxies between 1.7 < z < 3.

@misc{Emonts2011, abstract = { We report the detection of molecular CO(1-0) gas in the high-z radio galaxy MRC 0152-209 (z = 1.92) with the Australia Telescope Compact Array Broadband Backend (ATCA/CABB). This is the third known detection of CO(1-0) in a high-z radio galaxy to date. CO(1-0) is the most robust tracer of the overall molecular gas content (including the wide-spread, low-density and subthermally excited component), hence observations of CO(1-0) are crucial for studying galaxy evolution in the Early Universe. We derive L'(CO) = (6.6 +- 2.0) x 10^10 K km/s pc^2 for MRC 0152-209, which is comparable to that derived from CO(1-0) observations of several high-z submillimetre and starforming BzK galaxies. The CO(1-0) traces a total molecular hydrogen mass of M(H2) = 5 x 10^10 (alpha_x/0.8) Msun. MRC 0152-209 is an infra-red bright radio galaxy, in which a large reservoir of cold molecular gas has not (yet) been depleted by star formation or radio source feedback. Its compact radio source is reliably detected at 40 GHz and has a steep spectral index of alpha = -1.3 between 1.4 and 40 GHz (4-115 GHz in the galaxy's rest-frame). MRC 0152-209 is part of an ongoing systematic ATCA/CABB survey of CO(1-0) in high-z radio galaxies between 1.7 < z < 3. }, added-at = {2011-05-05T16:43:34.000+0200}, author = {Emonts, B. H. C. and Feain, I. and Mao, M. Y. and Norris, R. P. and Miley, G. and Ekers, R. D. and Villar-Martin, M. and Rottgering, H. J. A. and Sadler, E. M. and Rees, G. and Morganti, R. and Saikia, D. J. and Oosterloo, T. A. and Stevens, J. B. and Tadhunter, C. N.}, biburl = {https://www.bibsonomy.org/bibtex/2b5979c5e645569269d91bca00c1cf9ff/miki}, description = {[1105.0739] Molecular CO(1-0) gas in the z~2 radio galaxy MRC 0152-209}, interhash = {364d86b7278b5d8ab3a967756bc129da}, intrahash = {b5979c5e645569269d91bca00c1cf9ff}, keywords = {CO high-z}, note = {cite arxiv:1105.0739 Comment: Accepted for publication in ApJL -- 8 pages, 3 figures}, timestamp = {2011-05-05T16:43:34.000+0200}, title = {Molecular CO(1-0) gas in the z~2 radio galaxy MRC 0152-209}, url = {http://arxiv.org/abs/1105.0739}, year = 2011 }