@article{10902/28447,
year = {2011},
month = {1},
url = {https://hdl.handle.net/10902/28447},
abstract = {The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) has uncovered a population of strongly
lensed submillimeter galaxies (SMGs). The Zpectrometer instrument on the Green Bank Telescope (GBT) was
used to measure the redshifts and constrain the masses of the cold molecular gas reservoirs for two candidate highredshift lensed sources. We derive CO(1?0) redshifts of z = 3.042 ± 0.001 and z = 2.625 ± 0.001, and measure molecular gas masses of (1?3) ×1010 M, corrected for lens amplification and assuming a conversion factor of ? = 0.8 M ( K km s?1 pc2)?1. We find typicalL(IR)/L (CO) ratios of 120 ± 40 and 140±50L ( K km s?1 pc2)?1, which are consistent with those found for local ultraluminous infrared galaxies (ULIRGs) and other high-redshift SMGs. From analysis of published data, we find no evidence for enhanced L(IR)/L (CO(1?0)) ratios for the SMG population in comparison to local ULIRGs. The GBT results highlight the power of using the CO lines to derive blind redshifts, which is challenging for the SMGs at optical wavelengths given their high obscuration.},
organization = {We acknowledge the staff at Green Bank who have made these observations possible. We are indebted to the late Senator Robert C. Byrd for his strong support of the Green Bank Telescope. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. A.J.B. acknowledges support from the National Science Foundation through grant AST-0708653.
Facility: GBT (Zpectrometer)},
publisher = {Institute of Physics Publishing},
publisher = {Astrophysical Journal Letters, 2011, 726(2), L22},
title = {Green Bank Telescope Zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel ATLAS},
author = {Frayer, D. T. and Harris, A. I. and Baker, A. J. and Ivison, R. J. and Smail, Ian and Negrello, M. and Maddalena, R. and Aretxaga, I. and Baes, M. and Birkinshaw, M. and Bonfield, D. G. and Burgarella, D. and Buttiglione, S. and Cava, A. and Clements, D. L. and Cooray, A. and Dannerbauer, H. and Dariush, A. and Herranz Muñoz, Diego and López-Caniego Alcarria, Marcos},
}