skip to main content

SciTech ConnectSciTech Connect

Title: Extragalactic millimeter-wave point-source catalog, number counts and statistics from 771 deg{sup 2} of the SPT-SZ survey

We present a point-source catalog from 771 deg{sup 2} of the South Pole Telescope Sunyaev-Zel'dovich survey at 95, 150, and 220 GHz. We detect 1545 sources above 4.5σ significance in at least one band. Based on their relative brightness between survey bands, we classify the sources into two populations, one dominated by synchrotron emission from active galactic nuclei, and one dominated by thermal emission from dust-enshrouded star-forming galaxies. We find 1238 synchrotron and 307 dusty sources. We cross-match all sources against external catalogs and find 189 unidentified synchrotron sources and 189 unidentified dusty sources. The dusty sources without counterparts are good candidates for high-redshift, strongly lensed submillimeter galaxies. We derive number counts for each population from 1 Jy down to roughly 11, 4, and 11 mJy at 95, 150, and 220 GHz. We compare these counts with galaxy population models and find that none of the models we consider for either population provide a good fit to the measured counts in all three bands. The disparities imply that these measurements will be an important input to the next generation of millimeter-wave extragalactic source population models.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4] ; ; ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ; ;  [10] ;  [11] more »; « less
  1. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637 (United States)
  2. California Institute of Technology, Pasadena, CA 91125 (United States)
  3. University of Chicago, Chicago, IL 60637 (United States)
  4. European Southern Observatory, Alonso de Córdova 3107, Vitacura Santiago (Chile)
  5. Department of Astrophysical and Planetary Sciences and Department of Physics, University of Colorado, Boulder, CO 80309 (United States)
  6. Laboratoire AIM-Paris-Saclay, CEA/DSM/Irfu-CNRS-Université Paris Diderot, CEA-Saclay, Orme des Merisiers, F-91191 Gif-sur-Yvette (France)
  7. Cavendish Laboratory, University of Cambridge, 19 J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom)
  8. Department of Physics and Atmospheric Science, Dalhousie University, Halifax NS B3H 3J5 (Canada)
  9. NIST Quantum Devices Group, Boulder, CO 80305 (United States)
  10. Department of Physics, McGill University, Montreal, Quebec H3A 2T8 (Canada)
  11. Department of Physics, University of California, Berkeley, CA 94720 (United States)
Publication Date:
OSTI Identifier:
22348531
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 779; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BRIGHTNESS; CATALOGS; COMPARATIVE EVALUATIONS; DUSTS; EMISSION; GALAXIES; GALAXY NUCLEI; GHZ RANGE; GRAVITATIONAL LENSES; POINT SOURCES; RED SHIFT; STARS; SYNCHROTRON RADIATION SOURCES; SYNCHROTRONS; TELESCOPES