dc.contributor.author | Swinbank, Mark | en_US |
dc.contributor.author | Lacey, Cedric | en_US |
dc.contributor.author | Smail, Ian | en_US |
dc.contributor.author | Baugh, Carlton | en_US |
dc.contributor.author | Frenk, Carlos | en_US |
dc.contributor.author | Blain, Andrew | en_US |
dc.contributor.author | Chapman, Scott | en_US |
dc.contributor.author | Coppin, Kristen | en_US |
dc.contributor.author | Ivison, Rob | en_US |
dc.contributor.author | Hainline, Laura | en_US |
dc.contributor.author | Gonzalez, Juan | en_US |
dc.date.accessioned | 2014-03-12T19:20:59Z | |
dc.date.available | 2014-03-12T19:20:59Z | |
dc.date.issued | 2008-09-05 | en_US |
dc.identifier.citation | Swinbank, Mark, Cedric Lacey, Ian Smail, Carlton Baugh, et al. 2008. "The Properties of Sub-mm Galaxies in Hierarchical Models." Monthly Notices of the Royal Astronomical Society 391: 420. | en_US |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/10222/45439 | |
dc.identifier.uri | http://dx.doi.org/10.1111/j.1365-2966.2008.13911.x | |
dc.description.abstract | We use the combined GALFORM semi-analytical model of galaxy formation and GRASIL spectrophotometric code to investigate the properties of galaxies selected via their sub-mm emission. Our fiducial model has previously been shown to fit the properties of local ULIRGs, as well as the number counts of faint sub-mm galaxies. Here, we test the model in detail by comparing the SEDs and stellar, dynamical, gas and halo masses of sub-mm galaxies against observational data. We precisely mimic the sub-mm and radio selection function of the observations and show that the predicted far-infrared properties of model galaxies with S_850>5mJy and S_1.4>30uJy are in good agreement with observations. Although the dust emission model does not assume a single dust temperature, the far-infrared SEDs are well described by single component modified black-body spectrum with characteristic temperature 32+/-5K. We also find evidence that the observations may have uncovered evolution in the far-infrared--radio relation in ULIRGs out to z~2. We show that the predicted redshift distribution of sub-mm galaxies provides a reasonable fit to the observational data with a median redshift z=2.0, with the radio-selected subset predicted to make up approximately 75% of the population. However, the predicted K-band and mid-infrared (3--8um) flux densities of the sub-mm galaxies (and LBGs) are up to a factor 10x fainter than observed. This discrepancy may indicate that the stellar masses of the sub-mm galaxies in the model are too low: M~10^10Mo, while observations suggest more massive systems, M~10^11Mo. Finally, we discuss the potential modifications to the models which may improve the fit to the observational data. [Abridged] | en_US |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.title | The Properties of Sub-mm Galaxies in Hierarchical Models | en_US |
dc.title.alternative | arXiv:0809.0973 [astro-ph] | en_US |
dc.type | article | en_US |
dc.identifier.startpage | 420 | en_US |