The atacama cosmology telescope: Dusty star-forming galaxies and active galactic nuclei in the southern survey

Danica Marsden; Megan Gralla; Tobias A. Marriage; Eric R. Switzer; Bruce Partridge; Marcella Massardi; Gustavo Morales; Graeme Addison; J. Richard Bond; Devin Crichton; Sudeep Das; Mark Devlin; Rolando Dünner; Amir Hajian; Matt Hilton; Adam Hincks; John P. Hughes; Kent Irwin; Arthur Kosowsky; Felipe Menanteau; Kavilan Moodley; Michael Niemack; Lyman Page; Erik D. Reese; Schmitt Benjamin Schmitt; Neelima Sehgal; Jonathan Sievers; Suzanne Staggs; Daniel Swetz; Robert Thornton; Edward Wollack

doi:10.1093/mnras/stu001

The atacama cosmology telescope: Dusty star-forming galaxies and active galactic nuclei in the southern survey

Danica Marsden, Megan Gralla, Tobias A. Marriage, Eric R. Switzer, Bruce Partridge, Marcella Massardi, Gustavo Morales, Graeme Addison, J. Richard Bond, Devin Crichton, Sudeep Das, Mark Devlin, Rolando Dünner, Amir Hajian, Matt Hilton, Adam Hincks, John P. Hughes, Kent Irwin, Arthur Kosowsky, Felipe MenanteauKavilan Moodley, Michael Niemack, Lyman Page, Erik D. Reese, Schmitt Benjamin Schmitt, Neelima Sehgal, Jonathan Sievers, Suzanne Staggs, Daniel Swetz, Robert Thornton, Edward Wollack

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Abstract

We 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 usingACT-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 theAGNand 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, a148-218, of 3.7+0.62-0.86, 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.

Original language	English (US)
Pages (from-to)	1556-1574
Number of pages	19
Journal	Monthly Notices of the Royal Astronomical Society
Volume	439
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stu001
State	Published - Apr 2014

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Active-galaxies
High-redshift
Methods
Numerical-surveys-galaxies

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10.1093/mnras/stu001

Cite this

Marsden, D., Gralla, M., Marriage, T. A., Switzer, E. R., Partridge, B., Massardi, M., Morales, G., Addison, G., Bond, J. R., Crichton, D., Das, S., Devlin, M., Dünner, R., Hajian, A., Hilton, M., Hincks, A., Hughes, J. P., Irwin, K., Kosowsky, A., ... Wollack, E. (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(2), 1556-1574. https://doi.org/10.1093/mnras/stu001

@article{4867259c638642eb9406d81d76a04406,

title = "The atacama cosmology telescope: Dusty star-forming galaxies and active galactic nuclei in the southern survey",

abstract = "We 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 usingACT-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 theAGNand 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, a148-218, of 3.7+0.62-0.86, 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.",

keywords = "Active-galaxies, High-redshift, Methods, Numerical-surveys-galaxies",

author = "Danica Marsden and Megan Gralla and Marriage, {Tobias A.} and Switzer, {Eric R.} and Bruce Partridge and Marcella Massardi and Gustavo Morales and Graeme Addison and Bond, {J. Richard} and Devin Crichton and Sudeep Das and Mark Devlin and Rolando D{\"u}nner and Amir Hajian and Matt Hilton and Adam Hincks and Hughes, {John P.} and Kent Irwin and Arthur Kosowsky and Felipe Menanteau and Kavilan Moodley and Michael Niemack and Lyman Page and Reese, {Erik D.} and {Benjamin Schmitt}, Schmitt and Neelima Sehgal and Jonathan Sievers and Suzanne Staggs and Daniel Swetz and Robert Thornton and Edward Wollack",

year = "2014",

month = apr,

doi = "10.1093/mnras/stu001",

language = "English (US)",

volume = "439",

pages = "1556--1574",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Marsden, D, Gralla, M, Marriage, TA, Switzer, ER, Partridge, B, Massardi, M, Morales, G, Addison, G, Bond, JR, Crichton, D, Das, S, Devlin, M, Dünner, R, Hajian, A, Hilton, M, Hincks, A, Hughes, JP, Irwin, K, Kosowsky, A, Menanteau, F, Moodley, K, Niemack, M, Page, L, Reese, ED, Benjamin Schmitt, S, Sehgal, N, Sievers, J, Staggs, S, Swetz, D, Thornton, R & Wollack, E 2014, 'The atacama cosmology telescope: Dusty star-forming galaxies and active galactic nuclei in the southern survey', Monthly Notices of the Royal Astronomical Society, vol. 439, no. 2, pp. 1556-1574. https://doi.org/10.1093/mnras/stu001

TY - JOUR

T1 - The atacama cosmology telescope

T2 - Dusty star-forming galaxies and active galactic nuclei in the southern survey

AU - Marsden, Danica

AU - Gralla, Megan

AU - Marriage, Tobias A.

AU - Switzer, Eric R.

AU - Partridge, Bruce

AU - Massardi, Marcella

AU - Morales, Gustavo

AU - Addison, Graeme

AU - Bond, J. Richard

AU - Crichton, Devin

AU - Das, Sudeep

AU - Devlin, Mark

AU - Dünner, Rolando

AU - Hajian, Amir

AU - Hilton, Matt

AU - Hincks, Adam

AU - Hughes, John P.

AU - Irwin, Kent

AU - Kosowsky, Arthur

AU - Menanteau, Felipe

AU - Moodley, Kavilan

AU - Niemack, Michael

AU - Page, Lyman

AU - Reese, Erik D.

AU - Benjamin Schmitt, Schmitt

AU - Sehgal, Neelima

AU - Sievers, Jonathan

AU - Staggs, Suzanne

AU - Swetz, Daniel

AU - Thornton, Robert

AU - Wollack, Edward

PY - 2014/4

Y1 - 2014/4

N2 - We 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 usingACT-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 theAGNand 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, a148-218, of 3.7+0.62-0.86, 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.

AB - We 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 usingACT-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 theAGNand 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, a148-218, of 3.7+0.62-0.86, 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.

KW - Active-galaxies

KW - High-redshift

KW - Methods

KW - Numerical-surveys-galaxies

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U2 - 10.1093/mnras/stu001

DO - 10.1093/mnras/stu001

M3 - Article

AN - SCOPUS:84897065038

SN - 0035-8711

VL - 439

SP - 1556

EP - 1574

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

The atacama cosmology telescope: Dusty star-forming galaxies and active galactic nuclei in the southern survey

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