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Title: The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz

Journal Article · · JCAP
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  1. Cornell U., Phys. Dept.; Cornell U., Astron. Dept.; Princeton U.
  2. CCA, New York; Penn State U., Astron. Astrophys.; Penn State U.; Penn State U., University Park, IGC
  3. Princeton U.
  4. Yale U.
  5. Princeton U.; Pennsylvania U.
  6. JAI, UK
  7. Johns Hopkins U.
  8. Cardiff U.
  9. CCA, New York; Princeton U.
  10. British Columbia U.
  11. Cornell U., Astron. Dept.
  12. Pennsylvania U.
  13. NIST, Boulder
  14. Michigan U.
  15. Canadian Inst. Theor. Astrophys.
  16. Chile U., Santiago
  17. Kazan, IME
  18. Chicago U.
  19. SLAC; NIST, Boulder
  20. Princeton, Inst. Advanced Study
  21. Cornell U., Phys. Dept.
  22. KwaZulu Natal U.
  23. UC, Berkeley; Princeton U.
  24. Cambridge U., DAMTP
  25. Princeton U.; Princeton U., Astrophys. Sci. Dept.
  26. Chile U., Catolica
  27. NASA, Goddard
  28. BCCP, Berkeley
  29. Florida State U.
  30. Southern California U.
  31. Arizona U., Astron. Dept. - Steward Observ.
  32. Pittsburgh U.
  33. SUNY, Stony Brook
  34. SLAC
  35. Princeton U., Astrophys. Sci. Dept.
  36. Columbia U.; CCA, New York
  37. Toronto U., Astron. Dept.
  38. U. Toronto, Dunlap Inst. Astron. Astrophys.; Toronto U., Astron. Dept.
  39. Rutgers U., Piscataway
  40. Stanford U., Phys. Dept.
  41. Toronto U., Astron. Dept.; Canadian Inst. Theor. Astrophys.
  42. IJCLab, Orsay
  43. Perimeter Inst. Theor. Phys.
  44. Chicago U., Astron. Astrophys. Ctr.
  45. Orsay, IAS; Chile U., Catolica
  46. Chicago U., KICP; Chicago U., Astron. Astrophys. Ctr.; Chicago U.; Chicago U., EFI; Michigan U.
  47. NCSA, Urbana; Illinois U., Urbana (main)
  48. CCA, New York
  49. Milan Bicocca U.; Pennsylvania U.
  50. Cornell U., Phys. Dept.; Cornell U., Astron. Dept.
  51. Haverford Coll.
  52. Cambridge U., Inst. of Astron.
  53. Chile U., Catolica; Kazan, IME
  54. Stanford U., Phys. Dept.; KIPAC, Menlo Park
  55. Caltech
  56. McGill U.
  57. Valparaiso U., Catolica
  58. Michigan U.; Fermilab
  59. CCA, New York; Princeton U., Astrophys. Sci. Dept.
  60. UC, Davis
  61. West Chester U., Geo. Astron. Dept.; Pennsylvania U.
  62. Carnegie Mellon U.
  63. XIA LLC
  64. Arizona State U.
+ Show Author Affiliations

We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2 of the 2013–2016 survey, which covers >15000 deg2 at 98 and 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related to this, show numerous checks for systematic error done before unblinding. Using the likelihood for the cosmological analysis we constrain secondary sources of anisotropy and foreground emission, and derive a “CMB-only” spectrum that extends to ℓ=4000. At large angular scales, foreground emission at 150 GHz is ∼1% of TT and EE within our selected regions and consistent with that found by Planck. Using the same likelihood, we obtain the cosmological parameters for ΛCDM for the ACT data alone with a prior on the optical depth of τ=0.065±0.015. ΛCDM is a good fit. The best-fit model has a reduced χ2 of 1.07 (PTE=0.07) with H0=67.9±1.5 km/s/Mpc. We show that the lensing BB signal is consistent with ΛCDM and limit the celestial EB polarization angle to ψP =−0.07ˆ±0.09ˆ. We directly cross correlate ACT with Planck and observe generally good agreement but with some discrepancies in TE. All data on which this analysis is based will be publicly released.

Research Organization:
Arizona State U.; Arizona U., Astron. Dept. - Steward Observ.; BCCP, Berkeley; British Columbia U.; CCA, New York; Caltech; Cambridge U., DAMTP; Cambridge U., Inst. of Astron.; Canadian Inst. Theor. Astrophys.; Cardiff U.; Carnegie Mellon U.; Chicago U.; Chicago U., Astron. Astrophys. Ctr.; Chicago U., EFI; Chicago U., KICP; Chile U., Catolica; Chile U., Santiago; Columbia U.; Cornell U., Astron. Dept.; Cornell U., Phys. Dept.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Florida State U.; Haverford Coll.; IJCLab, Orsay; Illinois U., Urbana (main); JAI, UK; Johns Hopkins U.; Kazan, IME; KwaZulu Natal U.; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); McGill U.; Michigan U.; Milan Bicocca U.; NASA, Goddard; NCSA, Urbana; NIST, Boulder; Orsay, IAS; Penn State U.; Penn State U., Astron. Astrophys.; Penn State U., University Park, IGC; Pennsylvania U.; Perimeter Inst. Theor. Phys.; Pittsburgh U.; Princeton U.; Princeton U., Astrophys. Sci. Dept.; Princeton, Inst. Advanced Study; Rutgers U., Piscataway; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); SUNY, Stony Brook; Southern California U.; Stanford U., Phys. Dept.; Stony Brook University, NY (United States); Toronto U., Astron. Dept.; U. Toronto, Dunlap Inst. Astron. Astrophys.; UC, Berkeley; UC, Davis; Valparaiso U., Catolica; West Chester U., Geo. Astron. Dept.; XIA LLC; Yale U.
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); US Department of Energy; USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
The ACT Collaboration
Grant/Contract Number:
AC02-05CH11231; AC02-07CH11359; AC02-76SF00515; SC0020441
OSTI ID:
1647058
Report Number(s):
FERMILAB-PUB-20-384-AE; oai:inspirehep.net:1806987; arXiv:2007.07289
Journal Information:
JCAP, Journal Name: JCAP Vol. 12
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
CMBR experiments
CMBR polarisation
cosmological parameters from CMBR