Atacama Cosmology Telescope: Dusty Star-forming Galaxies and Active Galactic Nuclei in the Equatorial Survey

Megan B Gralla; Tobias A Marriage; Graeme Addison; Andrew J Baker; J. Richard Bond; Devin Crichton; Rahul Datta; Mark J Devlin; Joanna Dunkley; Rolando Dünner; Joseph Fowler; Patricio A Gallardo; Kirsten Hall; Mark Halpern; Matthew Hasselfield; Matt Hilton; Adam D Hincks; Kevin M Huffenberger; John P Hughes; Arthur Kosowsky; Carlos H López-Caraballo; Thibaut Louis; Danica Marsden; Kavilan Moodley; Michael D Niemack; Lyman A Page; Bruce Partridge; Jesus Rivera; Jonathan L Sievers; Suzanne Staggs; Ting Su; Daniel Swetz; Edward J Wollack

doi:10.3847/1538-4357/ab7915

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Atacama Cosmology Telescope: Dusty Star-forming Galaxies and Active Galactic Nuclei in the Equatorial Survey

Journal article

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Atacama Cosmology Telescope: Dusty Star-forming Galaxies and Active Galactic Nuclei in the Equatorial Survey

Megan B Gralla, Tobias A Marriage, Graeme Addison, Andrew J Baker, J. Richard Bond, Devin Crichton, Rahul Datta, Mark J Devlin, Joanna Dunkley, Rolando Dünner, …

The Astrophysical journal, Vol.893(2), p.104

04/21/2020

DOI: https://doi.org/10.3847/1538-4357/ab7915

Abstract

Blazars

Cosmic microwave background radiation

Extragalactic radio sources

Galactic radio sources

Radio source catalogs

Radio source counts

Radio sources

Submillimeter astronomy

We present a catalog of 510 radio-loud active galactic nuclei (AGNs, primarily blazars) and 287 dusty star-forming galaxies (DSFGs) detected by the Atacama Cosmology Telescope at significance in frequency bands centered on 148 GHz (2 mm), 218 GHz (1.4 mm), and 277 GHz (1.1 mm), from a 480 deg2 strip centered at R.A. 00h on the celestial equator with additional 360 deg2 shallower auxiliary fields at other longitudes. The combination of the deepest available 218 GHz wide-field imaging, our 277 GHz data, and multiband filtering results in the most sensitive wide-field millimeter-wave DSFG selection to date, with rms noise level referenced to 218 GHz reaching below 2 mJy. We have developed new techniques to remove Galactic contamination (including evidence for CO (2−1) line emission) from the extragalactic catalog, yielding a catalog of 321 Galactic sources in addition to the extragalactic catalog. We employ a new flux debiasing method that accounts for the heterogeneous sample selection in the presence of Galactic cuts. We present the spectral properties and source counts of the AGNs and DSFGs. The DSFG spectra depart from the Rayleigh-Jeans regime of an optically thin modified blackbody between 218 and 277 GHz, consistent with optically thick emission or an additional cold dust component. For AGNs with 148 and 218 GHz flux density >50 mJy, we estimate the interyear rms fractional deviation in flux density due to source variability to be 40% with a 0.98 interband correlation coefficient. We provide source counts for AGNs in the range of 8-2870 mJy and for DSFGs in the range of 8-90 mJy. Our DSFG counts probe both the brighter, lensed population and the fainter, unlensed population. At 277 GHz we report the first measurements of source counts at these flux densities, finding an excess above most model count predictions. Finally, we present 30 of the brightest DSFGs that were selected for multifrequency study as candidate high-z lensed systems.

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Title: Atacama Cosmology Telescope: Dusty Star-forming Galaxies and Active Galactic Nuclei in the Equatorial Survey
Creators: Megan B Gralla - University of Arizona Department of Astronomy/Steward Observatory, 933 N. Cherry Ave., Tucson, AZ 85721, USA
Tobias A Marriage - Johns Hopkins University Department of Physics and Astronomy, 3400 N. Charles St., Baltimore, MD 21218, USA
Graeme Addison - Johns Hopkins University Department of Physics and Astronomy, 3400 N. Charles St., Baltimore, MD 21218, USA
Andrew J Baker - Rutgers University Department of Physics and Astronomy, 136 Frelinghuysen Rd., Piscataway, NJ 08854-8019, USA
J. Richard Bond - University of Toronto Canadian Institute for Theoretical Astrophysics, 60 St. George St., Toronto, ON M5S 3H8, Canada
Devin Crichton - University of KwaZulu-Natal Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, Westville Campus, Durban 4041, South Africa
Rahul Datta - Johns Hopkins University Department of Physics and Astronomy, 3400 N. Charles St., Baltimore, MD 21218, USA
Mark J Devlin - University of Pennsylvania Department of Physics and Astronomy, 209 South 33rd St., Philadelphia, PA 19104, USA
Joanna Dunkley - Princeton University Department of Astrophysical Sciences, Peyton Hall, Princeton, NJ 08544, USA
Rolando Dünner - Pontificia Universidad Católica de Chile Instituto de Astrofísica and Centro de Astro-Ingeniería, Facultad de Física, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Joseph Fowler - NIST Quantum Sensors Group, Boulder, CO 80305, USA
Patricio A Gallardo - Cornell University Department of Physics, Ithaca, NY 14853, USA
Kirsten Hall - Johns Hopkins University Department of Physics and Astronomy, 3400 N. Charles St., Baltimore, MD 21218, USA
Mark Halpern - University of British Columbia Department of Physics and Astronomy, Vancouver, BC V6T 1Z4, Canada
Matthew Hasselfield - The Pennsylvania State University Department of Astronomy and Astrophysics, University Park, PA 16802, USA
Matt Hilton - University of KwaZulu-Natal Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, Westville Campus, Durban 4041, South Africa
Adam D Hincks - University of Toronto Canadian Institute for Theoretical Astrophysics, 60 St. George St., Toronto, ON M5S 3H8, Canada
Kevin M Huffenberger - Florida State University Department of Physics, Tallahassee, FL 32306, USA
John P Hughes - Rutgers University Department of Physics and Astronomy, 136 Frelinghuysen Rd., Piscataway, NJ 08854-8019, USA
Arthur Kosowsky - University of Pittsburgh Department of Physics and Astronomy, Pittsburgh, PA 15260, USA
Carlos H López-Caraballo - Universidad de La Serena Departamento de Matemáticas, Av. Juan Cisternas 1200, La Serena, Chile
Thibaut Louis - Univ. Paris-Sud LAL, CNRS/IN2P3, Université Paris-Saclay, Orsay, France
Danica Marsden - D-Wave Systems, 3033 Beta Avenue, Burnaby, BC V5G 4M9, Canada
Kavilan Moodley - University of KwaZulu-Natal Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, Westville Campus, Durban 4041, South Africa
Michael D Niemack - Cornell University Department of Physics, Ithaca, NY 14853, USA
Lyman A Page - Princeton University Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton, NJ 08544, USA
Bruce Partridge - Department of Physics and Astronomy, Haverford College, Haverford, PA 19041, USA
Jesus Rivera - Rutgers University Department of Physics and Astronomy, 136 Frelinghuysen Rd., Piscataway, NJ 08854-8019, USA
Jonathan L Sievers - University of KwaZulu-Natal Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, Westville Campus, Durban 4041, South Africa
Suzanne Staggs - Princeton University Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton, NJ 08544, USA
Ting Su - Johns Hopkins University Department of Physics and Astronomy, 3400 N. Charles St., Baltimore, MD 21218, USA
Daniel Swetz - NIST Quantum Sensors Group, Boulder, CO 80305, USA
Edward J Wollack - NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
Publication Details: The Astrophysical journal, Vol.893(2), p.104
Date published: 04/21/2020
Publisher: The American Astronomical Society
Number of pages: 28
Grant note: AST-0965625 / NSF PHY-0855887 / NSF AST-0408698 / NSF
Academic Unit: Physics and Astronomy (SAS)
Language: English
Resource Type: Journal article
Identifiers: 991031665255204646