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The Atacama Cosmology Telescope: dusty star-forming galaxies and active galactic nuclei in the Southern survey

Author(s): Marsden, Danica; Gralla, Megan; Marriage, Tobias A; Switzer, Eric R; Partridge, Bruce; et al

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dc.contributor.authorMarsden, Danica-
dc.contributor.authorGralla, Megan-
dc.contributor.authorMarriage, Tobias A-
dc.contributor.authorSwitzer, Eric R-
dc.contributor.authorPartridge, Bruce-
dc.contributor.authorMassardi, Marcella-
dc.contributor.authorMorales, Gustavo-
dc.contributor.authorAddison, Graeme-
dc.contributor.authorBond, J Richard-
dc.contributor.authorCrichton, Devin-
dc.contributor.authorDas, Sudeep-
dc.contributor.authorDevlin, Mark-
dc.contributor.authorDuenner, Rolando-
dc.contributor.authorHajian, Amir-
dc.contributor.authorHilton, Matt-
dc.contributor.authorHincks, Adam-
dc.contributor.authorHughes, John P-
dc.contributor.authorIrwin, Kent-
dc.contributor.authorKosowsky, Arthur-
dc.contributor.authorMenanteau, Felipe-
dc.contributor.authorMoodley, Kavilan-
dc.contributor.authorNiemack, Michael-
dc.contributor.authorPage Jr, Lyman A-
dc.contributor.authorReese, Erik D-
dc.contributor.authorSchmitt, Benjamin-
dc.contributor.authorSehgal, Neelima-
dc.contributor.authorSievers, Jonathan-
dc.contributor.authorStaggs, Suzanne T-
dc.contributor.authorSwetz, Daniel-
dc.contributor.authorThornton, Robert-
dc.contributor.authorWollack, Edward-
dc.identifier.citationMarsden, Danica, Gralla, Megan, Marriage, Tobias A, Switzer, Eric R, Partridge, Bruce, Massardi, Marcella, Morales, Gustavo, Addison, Graeme, Bond, J Richard, Crichton, Devin, Das, Sudeep, Devlin, Mark, Duenner, Rolando, Hajian, Amir, Hilton, Matt, Hincks, Adam, Hughes, John P, Irwin, Kent, Kosowsky, Arthur, Menanteau, Felipe, Moodley, Kavilan, Niemack, Michael, Page, Lyman, Reese, Erik D, Schmitt, Benjamin, Sehgal, Neelima, Sievers, Jonathan, Staggs, Suzanne, Swetz, Daniel, Thornton, Robert, Wollack, Edward. (2014). The Atacama Cosmology Telescope: dusty star-forming galaxies and active galactic nuclei in the Southern survey. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 439 (1556 - 1574. doi:10.1093/mnras/stu001en_US
dc.description.abstractWe present a catalogue of 191 extragalactic sources detected by the Atacama Cosmology Telescope (ACT) at 148 and/or 218 GHz in the 2008 Southern survey. Flux densities span 14 -1700 mJy, and we use source spectral indices derived using ACT-only data to divide our sources into two subpopulations: 167 radio galaxies powered by central active galactic nuclei (AGN) and 24 dusty star-forming galaxies (DSFGs). We cross-identify 97 per cent of our sources (166 of the AGN and 19 of the DSFGs) with those in currently available catalogues. When combined with flux densities from the Australia Telescope 20 GHz survey and follow-up observations with the Australia Telescope Compact Array, the synchrotron-dominated population is seen to exhibit a steepening of the slope of the spectral energy distribution from 20 to 148 GHz, with the trend continuing to 218 GHz. The ACT dust-dominated source population has a median spectral index, alpha(148-218), of 3.7(-0.86)(+0.62), and includes both local galaxies and sources with redshift around 6. Dusty sources with no counterpart in existing catalogues likely belong to a recently discovered subpopulation of DSFGs lensed by foreground galaxies or galaxy groups.en_US
dc.format.extent1556 - 1574en_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleThe Atacama Cosmology Telescope: dusty star-forming galaxies and active galactic nuclei in the Southern surveyen_US
dc.typeJournal Articleen_US

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