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Green bank telescope zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel atlas

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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 high-redshift 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) x10(10) M-circle dot, corrected for lens amplification and assuming a conversion factor of alpha = 0.8M(circle dot) (Kkm s-(1) pc(2))(-1). We find typical L(IR)/L'(CO) ratios of 120 +/- 40 and 140 +/- 50L(circle dot) (Kkm s(-1) pc(2))(-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.
Keywords
LINE, EMISSION, POPULATION, DISK GALAXIES, REDSHIFT DISTRIBUTION, MOLECULAR GAS, LUMINOUS INFRARED GALAXIES, CONSTRAINTS, CLUSTERS, REGIONS, galaxies: evolution, galaxies: formation, galaxies: individual (SDP.81: H-ATLAS J090311.6+003906, SDP.130: H-ATLAS J091305.0-005343), galaxies: starburst

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MLA
Frayer, DT, AI Harris, AJ Baker, et al. “Green Bank Telescope Zpectrometer CO(1-0) Observations of the Strongly Lensed Submillimeter Galaxies from the Herschel Atlas.” ASTROPHYSICAL JOURNAL LETTERS 726.2 (2011): n. pag. Print.
APA
Frayer, D., Harris, A., Baker, A., Ivison, R., Smail, I., Negrello, M., Maddalena, R., et al. (2011). Green bank telescope zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel atlas. ASTROPHYSICAL JOURNAL LETTERS, 726(2).
Chicago author-date
Frayer, DT, AI Harris, AJ Baker, RJ Ivison, I Smail, M Negrello, R Maddalena, et al. 2011. “Green Bank Telescope Zpectrometer CO(1-0) Observations of the Strongly Lensed Submillimeter Galaxies from the Herschel Atlas.” Astrophysical Journal Letters 726 (2).
Chicago author-date (all authors)
Frayer, DT, AI Harris, AJ Baker, RJ Ivison, I Smail, M Negrello, R Maddalena, I Aretxaga, Maarten Baes, M Birkinshaw, DG Bonfield, D Burgarella, S Buttiglione, A Cava, DL Clements, A Cooray, H Dannerbauer, A Dariush, G De Zotti, JS Dunlop, L Dunne, S Dye, S Eales, Jacopo Fritz, J Gonzalez-Nuevo, D Herranz, R Hopwood, DH Hughes, E Ibar, MJ Jarvis, G Lagache, LL Leeuw, M Lopez-Caniego, S Maddox, MJ Michallowski, A Omont, M Pohlen, E Rigby, G Rodighiero, D Scott, S Serjeant, DJB Smith, AM Swinbank, P Temi, MA Thompson, I Valtchanov, PP van der Werf, and A Verma. 2011. “Green Bank Telescope Zpectrometer CO(1-0) Observations of the Strongly Lensed Submillimeter Galaxies from the Herschel Atlas.” Astrophysical Journal Letters 726 (2).
Vancouver
1.
Frayer D, Harris A, Baker A, Ivison R, Smail I, Negrello M, et al. Green bank telescope zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel atlas. ASTROPHYSICAL JOURNAL LETTERS. 2011;726(2).
IEEE
[1]
D. Frayer et al., “Green bank telescope zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel atlas,” ASTROPHYSICAL JOURNAL LETTERS, vol. 726, no. 2, 2011.
@article{1241009,
  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 high-redshift 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) x10(10) M-circle dot, corrected for lens amplification and assuming a conversion factor of alpha = 0.8M(circle dot) (Kkm s-(1) pc(2))(-1). We find typical L(IR)/L'(CO) ratios of 120 +/- 40 and 140 +/- 50L(circle dot) (Kkm s(-1) pc(2))(-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.},
  articleno    = {L22},
  author       = {Frayer, DT and Harris, AI and Baker, AJ and Ivison, RJ and Smail, I and Negrello, M and Maddalena, R and Aretxaga, I and Baes, Maarten and Birkinshaw, M and Bonfield, DG and Burgarella, D and Buttiglione, S and Cava, A and Clements, DL and Cooray, A and Dannerbauer, H and Dariush, A and De Zotti, G and Dunlop, JS and Dunne, L and Dye, S and Eales, S and Fritz, Jacopo and Gonzalez-Nuevo, J and Herranz, D and Hopwood, R and Hughes, DH and Ibar, E and Jarvis, MJ and Lagache, G and Leeuw, LL and Lopez-Caniego, M and Maddox, S and Michallowski, MJ and Omont, A and Pohlen, M and Rigby, E and Rodighiero, G and Scott, D and Serjeant, S and Smith, DJB and Swinbank, AM and Temi, P and Thompson, MA and Valtchanov, I and van der Werf, PP and Verma, A},
  issn         = {2041-8205},
  journal      = {ASTROPHYSICAL JOURNAL LETTERS},
  keywords     = {LINE,EMISSION,POPULATION,DISK GALAXIES,REDSHIFT DISTRIBUTION,MOLECULAR GAS,LUMINOUS INFRARED GALAXIES,CONSTRAINTS,CLUSTERS,REGIONS,galaxies: evolution,galaxies: formation,galaxies: individual (SDP.81: H-ATLAS J090311.6+003906,SDP.130: H-ATLAS J091305.0-005343),galaxies: starburst},
  language     = {eng},
  number       = {2},
  pages        = {6},
  title        = {Green bank telescope zpectrometer CO(1-0) observations of the strongly lensed submillimeter galaxies from the Herschel atlas},
  url          = {http://dx.doi.org/10.1088/2041-8205/726/2/L22},
  volume       = {726},
  year         = {2011},
}

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