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Title: Fractional polarization of extragalactic sources in the 500 deg2 SPTpol survey

Journal Article · · Monthly Notices of the Royal Astronomical Society
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  1. Univ. of Melbourne, Parkville, VIC (Australia)
  2. Univ. of Melbourne, Parkville, VIC (Australia)
  3. Cardiff Univ., Cardiff (United Kingdom)
  4. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States)
  5. Univ. of Illinois at Urbana-Champaign, IL (United States)
  6. National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
  7. Univ. of California, Berkeley, CA (United States)
  8. Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  9. Univ. of KwaZulu-Natal, Durban (South Africa)
  10. Univ. of Chicago, IL (United States)
  11. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  12. Univ. of Chicago, IL (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States)
  13. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  14. McGill Univ., Montreal, QC (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
  15. Univ. of Colorado, Boulder, CO (United States)
  16. Univ. of Chicago, IL (United States); Harvey Mudd College, Claremont, CA (United States)
  17. Univ. of California, Berkeley, CA (United States); European Southern Observatory, Garching (Germany)
  18. McGill Univ., Montreal, QC (Canada)
  19. Univ. of Illinois at Urbana-Champaign, IL (United States); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
  20. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  21. Univ. of California, Davis, CA (United States)
  22. National Inst. of Standards and Technology (NIST), Boulder, CO (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  23. Univ. of Arizona, Tucson, AZ (United States)
  24. Univ. of Michigan, Ann Arbor, MI (United States)
  25. Ludwig Maximilian Univ., Munich (Germany); Max Planck Inst. for Extraterrestrial Physics, Garching (Germany)
  26. Univ. of Illinois at Urbana-Champaign, IL (United States); Univ. of Toronto, ON (Canada)
  27. Argonne National Lab. (ANL), Argonne, IL (United States)
  28. Univ. of Minnesota, Minneapolis, MN (United States)
  29. Case Western Reserve Univ., Cleveland, OH (United States)
  30. Univ. of Chicago, IL (United States); School of the Art Inst. of Chicago, Chicago, IL (United States)
  31. Univ. of California, Berkeley, CA (United States); Univ. of Chicago, IL (United States)
  32. McGill Univ., Montreal, QC (Canada); Three-Speed Logic, Inc., Vancouver, B.C. (Canada)
  33. Case Western Reserve Univ., Cleveland, OH (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)
  34. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  35. Stanford Univ., CA (United States)
  36. Univ. of Chicago, IL (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  37. Cardiff Univ. Cardiff (United Kingdom)
  38. Univ. of Toronto, ON (Canada)
  39. Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States)
  40. Univ. of California, Los Angeles, CA (United States)
  41. Univ. of Chicago, IL (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)
+ Show Author Affiliations

We study the polarization properties of extragalactic sources at 95 and 150 GHz in the SPTpol 500 deg2 survey. We estimate the polarized power by stacking maps at known source positions, and correct for noise bias by subtracting the mean polarized power at random positions in the maps. We show that the method is unbiased using a set of simulated maps with similar noise properties to the real SPTpol maps. We find a flux-weighted mean-squared polarization fraction $$\langle$$p2$$\rangle$$ = [8.9 ± 1.1] × 10-4 at 95 GHz and [6.9 ± 1.1] × 10-4 at 150 GHz for the full sample. This is consistent with the values obtained for a subsample of active galactic nuclei. For dusty sources, we find 95 percent upper limits of $$\langle$$p2$$\rangle$$95 < 16.9 × 10-3 and $$\langle$$p2$$\rangle$$150 < 2.6 × 10-3. We find no evidence that the polarization fraction depends on the source flux or observing frequency. The 1σ upper limit on measured mean-squared polarization fraction at 150 GHz implies that extragalactic foregrounds will be subdominant to the CMB E and B mode polarization power spectra out to at least ℓ ≲ 5700 (ℓ ≲ 4700) and ℓ ≲ 5300 (ℓ ≲ 3600), respectively, at 95 (150) GHz.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Kavli Foundation; Gordon and Betty Moore Foundation; Australian Research Council (ARC)
Contributing Organization:
SPT
Grant/Contract Number:
AC02-07CH11359; AC02-05CH11231; AC02-76SF00515; PHY-1125897; GBMF 947; PLR-1248097
OSTI ID:
1607541
Alternate ID(s):
OSTI ID: 1556975; OSTI ID: 1634014; OSTI ID: 1737589
Report Number(s):
arXiv:1907.02156; FERMILAB-PUB-19-386-AE; oai:inspirehep.net:1742660
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 4; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data journal January 2018
The Simons Observatory: Science goals and forecasts text January 2019
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Extragalactic millimeter-wave sources in South Pole Telescope survey data: source counts, catalog, and statistics for an 87 square-degree field text January 2009
The Atacama Cosmology Telescope: Extragalactic Sources at 148 GHz in the 2008 Survey text January 2010
High--frequency predictions for number counts and spectral properties of extragalactic radio sources. New evidences of a break at mm wavelengths in spectra of bright blazar sources text January 2011
SPTpol: an instrument for CMB polarization measurements with the South Pole Telescope text January 2012
Measurements of E-Mode Polarization and Temperature-E-Mode Correlation in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data text January 2014
Measurements of Sub-degree B-mode Polarization in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data text January 2015
Measurements of the Temperature and E-Mode Polarization of the CMB from 500 Square Degrees of SPTpol Data text January 2017
Characterization of polarimetric and total intensity behaviour of a complete sample of PACO radio sources in the radio bands text January 2017
The Simons Observatory: Science goals and forecasts text January 2018
Representations of celestial coordinates in FITS text January 2002
Predictions for high-frequency radio surveys of extragalactic sources text January 2004
AGN-controlled cooling in elliptical galaxies text January 2006
The properties of extragalactic radio sources selected at 20 GHz text January 2006
Radio Sources Toward Galaxy Clusters at 30 GHz text January 2006

Figures / Tables (6)

Figure 1(p. 5)figure Figure 1
Figure 2(p. 6)figure Figure 2
Figure 3(p. 6)figure Figure 3
Figure 4(p. 7)figure Figure 4
Table 1(p. 7)table Table 1
Figure 5(p. 9)figure Figure 5

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