dc.contributor.author | Chapman, S. C. | en_US |
dc.contributor.author | Neri, R. | en_US |
dc.contributor.author | Bertoldi, F. | en_US |
dc.contributor.author | Smail, Ian | en_US |
dc.contributor.author | Greve, T. R. | en_US |
dc.contributor.author | Trethewey, D. | en_US |
dc.contributor.author | Blain, A. W. | en_US |
dc.contributor.author | Cox, P. | en_US |
dc.contributor.author | Genzel, R. | en_US |
dc.contributor.author | Ivison, R. J. | en_US |
dc.contributor.author | Kovacs, A. | en_US |
dc.contributor.author | Swinbank, A. Omont A. M. | en_US |
dc.date.accessioned | 2014-03-12T19:21:07Z | |
dc.date.available | 2014-03-12T19:21:07Z | |
dc.date.issued | 2008-12-20 | en_US |
dc.identifier.citation | Chapman, S. C., R. Neri, F. Bertoldi, Ian Smail, et al. 2008. "Interferometric CO Observations of submillimeter-faint, radio-selected starburst galaxies at z~2." The Astrophysical Journal 689(2): 889-896 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://dx.doi.org/10.1086/592137 | en_US |
dc.identifier.uri | http://hdl.handle.net/10222/45516 | |
dc.description.abstract | High-redshift, dust-obscured galaxies -- selected to be luminous in the radio but relatively faint at 850um -- appear to represent a different population from the ultra-luminous submillimeter- (submm-) bright population. They may be star-forming galaxies with hotter dust temperatures or they may have lower far-infrared luminosities and larger contributions from obscured active galactic nuclei (AGN). Here we present observations of three z~2 examples of this population, which we term submm-faint radio galaxies (SFRGs) in CO(3-2) using the IRAM Plateau de Bure Interferometer to study their gas and dynamical properties. We estimate the molecular gas mass in each of the three SFRGs (8.3x10^{9} M_odot, =970 M_odot\yr) suggest much higher star-formation efficiencies than are found for SMGs, and shorter gas depletion time scales (~11 Myr), much shorter than the time required to form their current stellar masses (~160 Myr; ~10^{11} M_odot). By contrast, SFRs may be overestimated by factors of a few, bringing the efficiencies in line with those typically measured for other ultraluminous star-forming galaxies and suggesting SFRGs are more like ultraviolet- (UV-)selected star-forming galaxies with enhanced radio emission. A tentative detection of \rga at 350um suggests hotter dust temperatures -- and thus similar gas-to-dust mass fractions -- as the SMGs. We conclude that SFRGs' radio luminosities are larger than would naturally scale from local ULIRGs given their gas masses or gas fractions. | en_US |
dc.title | Interferometric CO Observations of submillimeter-faint, radio-selected starburst galaxies at z~2 | en_US |
dc.title.alternative | The Astrophysical Journal | en_US |
dc.type | article | en_US |
dc.identifier.volume | 689 | en_US |
dc.identifier.issue | 2 | en_US |
dc.identifier.startpage | 889 | en_US |