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Advances in Astronomy
Volume 2010 (2010), Article ID 847541, 17 pages
http://dx.doi.org/10.1155/2010/847541
Review Article

Large-Angle Anomalies in the CMB

1CERCA, Department of Physics, Case Western Reserve University, Cleveland, OH 44106-7079, USA
2Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109-1040, USA
3Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
4CERCA/ISO, Department of Physics, Case Western Reserve University, Cleveland, OH 44106-7079, USA

Received 30 April 2010; Revised 7 August 2010; Accepted 19 August 2010

Academic Editor: Eiichiro Komatsu

Copyright © 2010 Craig J. Copi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. C. L. Bennett, et al., “First-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: preliminary maps and basic results,” The Astrophysical Journal Supplement, vol. 148, no. 1, 2003.
  2. D. N. Spergel, L. Verde, H. V. Peiris et al., “First-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: determination of cosmological parameters,” Astrophysical Journal, Supplement Series, vol. 148, no. 1, pp. 175–194, 2003. View at Publisher · View at Google Scholar · View at Scopus
  3. G. Hinshaw, D. N. Spergel, L. Verde et al., “First-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: the angular power spectrum,” Astrophysical Journal, Supplement Series, vol. 148, no. 1, pp. 135–159, 2003. View at Publisher · View at Google Scholar · View at Scopus
  4. D. N. Spergel, R. Bean, O. Doré et al., “Three-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: implications for cosmology,” Astrophysical Journal, Supplement Series, vol. 170, no. 2, pp. 377–408, 2007. View at Publisher · View at Google Scholar · View at Scopus
  5. E. Komatsu, J. Dunkley, M. R. Nolta et al., “Five-year wilkinson microwave anisotropy probe observations: cosmological interpretation,” Astrophysical Journal, Supplement Series, vol. 180, no. 2, pp. 330–376, 2009. View at Publisher · View at Google Scholar · View at Scopus
  6. E. Komatsu, et al., “Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) observations: cosmological interpretation,” http://arxiv.org/abs/1001.4538.
  7. D. Huterer, “Mysteries on universe's largest observable scales,” New Astronomy Reviews, vol. 50, no. 11-12, pp. 868–874, 2006. View at Publisher · View at Google Scholar · View at Scopus
  8. L. R. Abramo and T. S. Pereira, “Testing gaussianity, homogeneity and isotropy with the cosmic microwave background,” http://arxiv.org/abs/1002.3173.
  9. C. T. Byrnes and K.-Y. Choi, “Review of local non-Gaussianity from multi-field inflation,” http://arxiv.org/abs/1002.3110.
  10. X. Chen, “Primordial non-Gaussianities from inflation models,” http://arxiv.org/abs/1002.1416.
  11. R. K. Sachs and A. M. Wolfe, Astrophysical Journal, vol. 147, p. 73, 1967.
  12. P. J. E. Peebles and D. T. Wilkinson, “Comment on the anisotropy of the primeval fireball,” Physical Review, vol. 174, no. 5, p. 2168, 1968. View at Publisher · View at Google Scholar · View at Scopus
  13. M. Kamionkowski and L. Knox, “Aspects of the cosmic microwave background dipole,” Physical Review D, vol. 67, no. 6, Article ID 063001, 2003. View at Publisher · View at Google Scholar · View at Scopus
  14. C. J. Copi, D. Huterer, D. J. Schwarz, and G. D. Starkman, “On the large-angle anomalies of the microwave sky,” Monthly Notices of the Royal Astronomical Society, vol. 367, no. 1, pp. 79–102, 2006. View at Publisher · View at Google Scholar · View at Scopus
  15. C. J. Copi, D. Huterer, and G. D. Starkman, “Multipole vectors: a new representation of the CMB sky and evidence for statistical anisotropy or non-Gaussianity at 2≤≤8,” Physical Review D, vol. 70, no. 4, Article ID 043515, 13 pages, 2004. View at Publisher · View at Google Scholar · View at Scopus
  16. C. J. Copi, “Freely downloadable multipole vector code,” http://www.phys.cwru.edu/projects/mpvectors/#code.
  17. G. Katz and J. Weeks, “Polynomial interpretation of multipole vectors,” Physical Review D, vol. 70, no. 6, Article ID 063527, 2004. View at Publisher · View at Google Scholar · View at Scopus
  18. J. R. Weeks, “Maxwell's multipole vectors and the CMB,” http://arxiv.org/abs/astro-ph/0412231.
  19. R. C. Helling, P. Schupp, and T. Tesileanu, “CMB statistical anisotropy, multipole vectors, and the influence of the dipole,” Physical Review D, vol. 74, no. 6, Article ID 063004, 2006. View at Publisher · View at Google Scholar · View at Scopus
  20. J. C. Maxwell, A Treatise on Electricity and Magnetism, Vol. I, Clarendon Press, London, UK, 3rd edition, 1891.
  21. M. R. Dennis, “Correlations between Maxwell's multipoles for Gaussian random functions on the sphere,” Journal of Physics A, vol. 38, no. 8, pp. 1653–1658, 2005. View at Publisher · View at Google Scholar · View at Scopus
  22. M. Tegmark, A. de Oliveira-Costa, and A. J. S. Hamilton, “High resolution foreground cleaned CMB map from WMAP,” Physical Review D, vol. 68, no. 12, Article ID 123523, 2003. View at Publisher · View at Google Scholar · View at Scopus
  23. A. de Oliveira-Costa, M. Tegmark, M. Zaldarriaga, and A. Hamilton, “Significance of the largest scale CMB fluctuations in WMAP,” Physical Review D, vol. 69, no. 6, Article ID 063516, 2004. View at Publisher · View at Google Scholar · View at Scopus
  24. D. J. Schwarz, G. D. Starkman, D. Huterer, and C. J. Copi, “Is the low- microwave background cosmic?” Physical Review Letters, vol. 93, no. 22, Article ID 221301, 2004. View at Publisher · View at Google Scholar · View at Scopus
  25. C. J. Copi, D. Huterer, D. J. Schwarz, and G. D. Starkman, “Uncorrelated universe: statistical anisotropy and the vanishing angular correlation function in WMAP years 1-3,” Physical Review D, vol. 75, no. 2, Article ID 023507, 2007. View at Publisher · View at Google Scholar · View at Scopus
  26. H. K. Eriksen, F. K. Hansen, A. J. Banday, K. M. Górski, and P. B. Lilje, “Asymmetries in the cosmic microwave background anisotropy field,” Astrophysical Journal, vol. 605, no. 1, pp. 14–20, 2004. View at Publisher · View at Google Scholar · View at Scopus
  27. F. K. Hansen, P. Cabella, D. Marinucci, and N. Vittorio, “Asymmetries in the local curvature of the wilkinson microwave anisotropy probe data,” Astrophysical Journal, vol. 607, no. 2, pp. L67–L70, 2004. View at Publisher · View at Google Scholar · View at Scopus
  28. A. Bernui, T. Villela, C. A. Wuensche, R. Leonardi, and I. Ferreira, “On the cosmic microwave background large-scale angular correlations,” Astronomy and Astrophysics, vol. 454, no. 2, pp. 409–414, 2006. View at Publisher · View at Google Scholar · View at Scopus
  29. A. Bernui, B. Mota, M. J. Rebouças, and R. Tavakol, “Mapping the large-scale anisotropy in the WMAP data,” Astronomy and Astrophysics, vol. 464, no. 2, pp. 479–485, 2007. View at Publisher · View at Google Scholar · View at Scopus
  30. M. R. Nolta, J. Dunkley, R. S. Hill et al., “Five-year wilkinson microwave anisotropy probe observations: angular power spectra,” Astrophysical Journal, Supplement Series, vol. 180, no. 2, pp. 296–305, 2009. View at Publisher · View at Google Scholar · View at Scopus
  31. C. J. Copi, D. Huterer, D. J. Schwarz, and G. D. Starkman, “No large-angle correlations on the non-Galactic microwave sky,” Monthly Notices of the Royal Astronomical Society, vol. 399, no. 1, pp. 295–303, 2009. View at Publisher · View at Google Scholar · View at Scopus
  32. G. Hinshaw, A. J. Banday, C. L. Bennett et al., “Two-point correlations in the COBE 1 DMR four-year anisotropy maps,” Astrophysical Journal, vol. 464, no. 1, pp. L25–L28, 1996. View at Scopus
  33. A. Pontzen and H. V. Peiris, “The cut-sky cosmic microwave background is not anomalous,” Physical Review D, vol. 81, no. 10, Article ID 103008, 2010. View at Publisher · View at Google Scholar · View at Scopus
  34. A. Hajian, “Analysis of the apparent lack of power in the cosmic microwave background anisotropy at large angular scales,” http://arxiv.org/abs/astro-ph/0702723.
  35. G. Efstathiou, Y.-Z. Ma, and D. Hanson, “Large-angle correlations in the cosmic microwave background,” Monthly Notices of the Royal Astronomical Society, vol. 407, no. 3, pp. 2530–2542, 2010. View at Publisher · View at Google Scholar
  36. G. Efstathiou, “A maximum likelihood analysis of the low cosmic microwave background multipoles from the Wilkinson Microwave Anisotropy Probe,” Monthly Notices of the Royal Astronomical Society, vol. 348, no. 3, pp. 885–896, 2004. View at Scopus
  37. I. J. O'Dwyer, H. K. Eriksen, B. D. Wandelt et al., “Bayesian power spectrum analysis of the first-year Wilkinson Microwave Anisotropy Probe data,” Astrophysical Journal, vol. 617, no. 2, pp. L99–L102, 2004. View at Publisher · View at Google Scholar · View at Scopus
  38. A. Rakić and D. J. Schwarz, “Correlating anomalies of the microwave sky,” Physical Review D, vol. 75, no. 10, Article ID 103002, 2007. View at Publisher · View at Google Scholar · View at Scopus
  39. D. Sarkar, D. Huterer, C. J. Copi, G. D. Starkman, and D. J. Schwarz, “Missing power vs low-l alignments in the cosmic microwave background: no correlation in the standard cosmological model,” http://arxiv.org/abs/1004.3784.
  40. C. Gordon, W. Hu, D. Huterer, and T. Crawford, “Spontaneous isotropy breaking: a mechanism for CMB multipole alignments,” Physical Review D, vol. 72, no. 10, Article ID 103002, 13 pages, 2005. View at Publisher · View at Google Scholar · View at Scopus
  41. E. F. Bunn and A. Bourdon, “Contamination cannot explain the lack of large-scale power in the cosmic microwave background radiation,” Physical Review D, vol. 78, no. 12, Article ID 123509, 2008. View at Publisher · View at Google Scholar · View at Scopus
  42. N. E. Groeneboom, H. K. Eriksen, K. Gorski, G. Huey, J. Jewell, and B. Wandelt, “Bayesian analysis of white noise levels in the five-year WMAP data,” Astrophysical Journal, vol. 702, no. 1, pp. L87–L90, 2009. View at Publisher · View at Google Scholar · View at Scopus
  43. N. E. Groeneboom and H. K. Eriksen, “Bayesian analysis of sparse anisotropic universe models and application to the five-year WMAP data,” Astrophysical Journal, vol. 690, no. 2, pp. 1807–1819, 2009. View at Publisher · View at Google Scholar · View at Scopus
  44. D. Hanson and A. Lewis, “Estimators for CMB statistical anisotropy,” Physical Review D, vol. 80, no. 6, Article ID 063004, 2009. View at Publisher · View at Google Scholar · View at Scopus
  45. L. Ackerman, S. M. Carroll, and M. B. Wise, “Imprints of a primordial preferred direction on the microwave background,” Physical Review D, vol. 75, no. 8, Article ID 083502, 2007. View at Publisher · View at Google Scholar · View at Scopus
  46. C. L. Bennett, et al., “Seven-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: are there cosmic microwave background anomalies?” http://arxiv.org/abs/1001.4758.
  47. D. Hanson, A. Lewis, and A. Challinor, “Asymmetric beams and CMB statistical anisotropy,” Physical Review D, vol. 81, no. 10, Article ID 103003, 2010. View at Publisher · View at Google Scholar · View at Scopus
  48. J. Hoftuft, H. K. Eriksen, A. J. Banday, K. M. Górski, F. K. Hansen, and P. B. Lilje, “Increasing evidence for hemispherical power asymmetry in the five-year wmap data,” Astrophysical Journal, vol. 699, no. 2, pp. 985–989, 2009. View at Publisher · View at Google Scholar · View at Scopus
  49. S. Bashinsky and U. Seljak, “Signatures of relativistic neutrinos in CMB anisotropy and matter clustering,” Physical Review D, vol. 69, no. 8, Article ID 083002, 35 pages, 2004. View at Publisher · View at Google Scholar · View at Scopus
  50. P. Bielewicz, H. K. Eriksen, A. J. Banday, K. M. Górski, and P. B. Lilje, “Multipole vector anomalies in the first-year WMAP data: a cut-sky analysis,” Astrophysical Journal, vol. 635, no. 2, pp. 750–760, 2005. View at Publisher · View at Google Scholar · View at Scopus
  51. A. Rakić, S. Räsänen, and D. J. Schwarz, Monthly Notices of the Royal Astronomical Society, vol. 369, pp. L27–L31, 2006.
  52. P. C. Frisch, “Tentative identification of interstellar dust in the magnetic wall of the heliosphere,” Astrophysical Journal, vol. 632, no. 2, pp. L143–L146, 2005. View at Publisher · View at Google Scholar · View at Scopus
  53. K. T. Indue and J. Silk, “Local voids as the origin of large-angle cosmic microwave background anomalies. I,” Astrophysical Journal, vol. 648, no. 1, pp. 23–30, 2006. View at Publisher · View at Google Scholar · View at Scopus
  54. H. V. Peiris and T. L. Smith, “CMB isotropy anomalies and the local kinetic Sunyaev-Zel'dovich effect,” Physical Review D, vol. 81, no. 12, Article ID 123517, 2010. View at Publisher · View at Google Scholar · View at Scopus
  55. C. Vale, “Local pancake defeats axis of evil,” http://arxiv.org/abs/astro-ph/0509039.
  56. A. Cooray and N. Seto, “Did the Wilkinson Microwave Anisotropy Probe see moving local structures?” Journal of Cosmology and Astroparticle Physics, vol. 2005, no. 12, article 4, pp. 41–49, 2005. View at Publisher · View at Google Scholar · View at Scopus
  57. V. Dikarev, O. Preuß, S. Solanki, H. Krüger, and A. Krivov, “Understanding the WMAP results: low-order multipoles and dust in the vicinity of the solar system,” Earth, Moon and Planets, vol. 102, no. 1–4, pp. 555–561, 2008. View at Publisher · View at Google Scholar · View at Scopus
  58. V. Dikarev, O. Preuß, S. Solanki, H. Krüger, and A. Krivov, “The local dust foregrounds in the microwave sky. I. thermal emission spectra,” Astrophysical Journal, vol. 705, no. 1, pp. 670–682, 2009. View at Publisher · View at Google Scholar · View at Scopus
  59. H. K. Eriksen, A. J. Banday, K. M. Górski, and P. B. Lilje, “On foreground removal from the wilkinson microwave anisotropy probe data by an internal linear combination method: limitations and implications,” Astrophysical Journal, vol. 612, no. 2, pp. 633–646, 2004. View at Publisher · View at Google Scholar · View at Scopus
  60. A. de Oliveira-Costa and M. Tegmark, “CMB multipole measurements in the presence of foregrounds,” Physical Review D, vol. 74, no. 2, Article ID 023005, 2006. View at Publisher · View at Google Scholar · View at Scopus
  61. A. Hajian and T. Souradeep, “Measuring the statistical isotropy of the cosmic microwave background anisotropy,” Astrophysical Journal, vol. 597, no. 1, pp. L5–L8, 2003. View at Publisher · View at Google Scholar · View at Scopus
  62. A. Hajian, T. Souradeep, and N. Cornish, “Statistical isotropy of the wilkinson microwave anisotropy probe data: a bipolar power spectrum analysis,” Astrophysical Journal, vol. 618, no. 2, pp. L63–L66, 2005. View at Publisher · View at Google Scholar · View at Scopus
  63. T. S. Pereira and L. R. Abramo, “Angular-planar CMB power spectrum,” Physical Review D, vol. 80, no. 6, Article ID 063525, 2009. View at Publisher · View at Google Scholar · View at Scopus
  64. N. J. Cornish, D. N. Spergel, and G. D. Starkman, “Measuring the topology of the universe,” Proceedings of the National Academy of Sciences of the United States of America, vol. 95, no. 1, pp. 82–84, 1998. View at Publisher · View at Google Scholar · View at Scopus
  65. N. J. Cornish, D. Spergel, and G. Starkman, “Can COBE see the shape of the universe?” Physical Review D, vol. 57, no. 10, pp. 5982–5996, 1998. View at Scopus
  66. N. J. Cornish, D. N. Spergel, and G. D. Starkman, “Circles in the sky: finding topology with the microwave background radiation,” Classical and Quantum Gravity, vol. 15, no. 9, pp. 2657–2670, 1998. View at Scopus
  67. N. J. Cornish, D. N. Spergel, G. D. Starkman, and E. Komatsu, “Constraining the topology of the Universe,” Physical Review Letters, vol. 92, no. 20, Article ID 201302, 2004. View at Publisher · View at Google Scholar · View at Scopus
  68. J. S. Key, N. J. Cornish, D. N. Spergel, and G. D. Starkman, “Extending the WMAP bound on the size of the Universe,” Physical Review D, vol. 75, no. 8, Article ID 084034, 2007. View at Publisher · View at Google Scholar · View at Scopus
  69. R. Battye and A. Moss, “Anisotropic dark energy and CMB anomalies,” Physical Review D, vol. 80, no. 2, Article ID 023531, 2009. View at Publisher · View at Google Scholar · View at Scopus
  70. N. Afshordi, G. Geshnizjani, and J. Khoury, “Do observations offer evidence for cosmological-scale extra dimensions?” Journal of Cosmology and Astroparticle Physics, vol. 2009, no. 8, article 30, 2009. View at Publisher · View at Google Scholar · View at Scopus
  71. T. R. Jaffe, A. J. Banday, H. K. Eriksen, K. M. Górski, and F. K. Hansen, “Evidence of vorticity and shear at large angular scales in the WMAP data: a violation of cosmological isotropy?” Astrophysical Journal, vol. 629, no. 1, pp. L1–L4, 2005. View at Publisher · View at Google Scholar · View at Scopus
  72. T. Ghosh, A. Hajian, and T. Souradeep, “Unveiling hidden patterns in CMB anisotropy maps,” Physical Review D, vol. 75, no. 8, Article ID 083007, 2007. View at Publisher · View at Google Scholar · View at Scopus
  73. S. M. Carroll, C.-Y. Tseng, and M. B. Wise, “Translational invariance and the anisotropy of the cosmic microwave background,” Physical Review D, vol. 81, no. 8, Article ID 083501, 2010. View at Publisher · View at Google Scholar · View at Scopus
  74. L. Ackerman, S. M. Carroll, and M. B. Wise, “Imprints of a primordial preferred direction on the microwave background,” Physical Review D, vol. 75, no. 8, Article ID 083502, 2007. View at Publisher · View at Google Scholar · View at Scopus
  75. C. Armendariz-Picon, “Creating statistically anisotropic and inhomogeneous perturbations,” Journal of Cosmology and Astroparticle Physics, vol. 2007, no. 9, article 14, 2007. View at Publisher · View at Google Scholar · View at Scopus
  76. A. E. Gümrükçüoğlu, C. R. Contaldi, and M. Peloso, “Inflationary perturbations in anisotropic backgrounds and their imprint on the cosmic microwave background,” Journal of Cosmology and Astroparticle Physics, vol. 2007, no. 11, article 5, 2007. View at Publisher · View at Google Scholar · View at Scopus
  77. D. C. Rodrigues, “Anisotropic cosmological constant and the CMB quadrupole anomaly,” Physical Review D, vol. 77, no. 2, Article ID 023534, 2008. View at Publisher · View at Google Scholar · View at Scopus
  78. C. Pitrou, T. S. Pereira, and J.-P. Uzan, “Predictions from an anisotropic inflationary era,” Journal of Cosmology and Astroparticle Physics, vol. 2008, no. 4, article 4, 2008.
  79. A. L. Erickcek, M. Kamionkowski, and S. M. Carroll, “A hemispherical power asymmetry from inflation,” Physical Review D, vol. 78, no. 12, Article ID 123520, 2008. View at Publisher · View at Google Scholar · View at Scopus
  80. A. L. Erickcek, C. M. Hirata, and M. Kamionkowski, “A scale-dependent power asymmetry from isocurvature perturbations,” Physical Review D, vol. 80, no. 8, Article ID 083507, 2009. View at Publisher · View at Google Scholar · View at Scopus
  81. A. Pontzen, “Rogues' gallery: the full freedom of the Bianchi CMB anomalies,” Physical Review D, vol. 79, no. 10, Article ID 103518, 2009. View at Publisher · View at Google Scholar · View at Scopus
  82. A. R. Pullen and M. Kamionkowski, “Cosmic microwave background statistics for a direction-dependent primordial power spectrum,” Physical Review D, vol. 76, no. 10, Article ID 103529, 2007. View at Publisher · View at Google Scholar · View at Scopus
  83. C. Dvorkin, H. V. Peiris, and W. Hu, “Testable polarization predictions for models of CMB isotropy anomalies,” Physical Review D, vol. 77, no. 6, Article ID 063008, 2008. View at Publisher · View at Google Scholar · View at Scopus
  84. H. Zhan, L. Knox, J. A. Tyson, and V. Margoniner, “Exploring large-scale structure with billions of galaxies,” Astrophysical Journal, vol. 640, no. 1, pp. 8–17, 2006. View at Publisher · View at Google Scholar · View at Scopus
  85. A. R. Pullen and C. M. Hirata, “Non-detection of a statistically anisotropic power spectrum in large-scale structure,” Journal of Cosmology and Astroparticle Physics, vol. 2010, no. 5, article 27, 2010. View at Publisher · View at Google Scholar · View at Scopus
  86. C. L. Francis and J. A. Peacock, “An estimate of the local integrated Sachs-Wolfe signal and its impact on cosmic microwave background anomalies,” Monthly Notices of the Royal Astronomical Society, vol. 406, no. 1, pp. 14–21, 2010. View at Publisher · View at Google Scholar · View at Scopus
  87. K. Land and J. Magueijo, “Examination of evidence for a preferred axis in the cosmic radiation anisotropy,” Physical Review Letters, vol. 95, no. 7, Article ID 071301, 4 pages, 2005. View at Publisher · View at Google Scholar · View at Scopus
  88. K. Land and J. Magueijo, “The axis of evil revisited,” Monthly Notices of the Royal Astronomical Society, vol. 378, no. 1, pp. 153–158, 2007. View at Publisher · View at Google Scholar · View at Scopus
  89. K. Land and J. Magueijo, “Is the Universe odd?” Physical Review D, vol. 72, no. 10, Article ID 101302, 5 pages, 2005. View at Publisher · View at Google Scholar · View at Scopus
  90. J. Kim and P. Naselsky, “Anomalous parity asymmetry of the Wilkinson microwave anisotropy probe power spectrum data at low multipoles,” Astrophysical Journal, vol. 714, no. 2, pp. L265–L267, 2010. View at Publisher · View at Google Scholar · View at Scopus
  91. J. Kim and P. Naselsky, “Anomalous parity asymmetry of WMAP power spectrum data at low multpoles: is it cosmological or systematics?” http://arxiv.org/abs/1002.0148.