Excess ellipticity of hot and cold spots in the WMAP data?

Berntsen, Eirik

doi:10.1088/0004-637X/779/1/37

Title: Excess ellipticity of hot and cold spots in the WMAP data?

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Abstract

We investigate claims of excess ellipticity of hot and cold spots in the Wilkinson Microwave Anisotropy Probe (WMAP) data. Using the cosmic microwave background (CMB) data from 7 yr of observations by the WMAP satellite, we find, contrary to previous claims of a 10σ detection of excess ellipticity in the 3 yr data, that the ellipticity of hot and cold spots is perfectly consistent with simulated CMB maps based on the concordance cosmology. We further test for excess obliquity and excess skewness/kurtosis of ellipticity and obliquity and find the WMAP7 data consistent with Gaussian simulated maps.

Authors:: Berntsen, Eirik

Publication Date:: Tue Dec 10 00:00:00 EST 2013

OSTI Identifier:: 22348550

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 779; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; ASYMMETRY; BACKGROUND RADIATION; COSMOLOGY; DATA ANALYSIS; DETECTION; DISTRIBUTION; MAPS; RELICT RADIATION; SATELLITES; SIMULATION; STATISTICS

Citation Formats


                    Berntsen, Eirik, and Hansen, Frode K., E-mail: baardeb@astro.uio.no, E-mail: frodekh@astro.uio.no. Excess ellipticity of hot and cold spots in the WMAP data?.  United States: N. p., 2013. 
        Web.  doi:10.1088/0004-637X/779/1/37.

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                    Berntsen, Eirik, & Hansen, Frode K., E-mail: baardeb@astro.uio.no, E-mail: frodekh@astro.uio.no. Excess ellipticity of hot and cold spots in the WMAP data?.  United States.  https://doi.org/10.1088/0004-637X/779/1/37

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                    Berntsen, Eirik, and Hansen, Frode K., E-mail: baardeb@astro.uio.no, E-mail: frodekh@astro.uio.no. 2013.  
        "Excess ellipticity of hot and cold spots in the WMAP data?".  United States.  https://doi.org/10.1088/0004-637X/779/1/37.

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@article{osti_22348550,

  title        = {Excess ellipticity of hot and cold spots in the WMAP data?},

  author       = {Berntsen, Eirik and Hansen, Frode K., E-mail: baardeb@astro.uio.no, E-mail: frodekh@astro.uio.no},

  abstractNote = {We investigate claims of excess ellipticity of hot and cold spots in the Wilkinson Microwave Anisotropy Probe (WMAP) data. Using the cosmic microwave background (CMB) data from 7 yr of observations by the WMAP satellite, we find, contrary to previous claims of a 10σ detection of excess ellipticity in the 3 yr data, that the ellipticity of hot and cold spots is perfectly consistent with simulated CMB maps based on the concordance cosmology. We further test for excess obliquity and excess skewness/kurtosis of ellipticity and obliquity and find the WMAP7 data consistent with Gaussian simulated maps.},

  doi          = {10.1088/0004-637X/779/1/37},

  url          = {https://www.osti.gov/biblio/22348550},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 1,

  volume       = 779,

  place        = {United States},

  year         = {Tue Dec 10 00:00:00 EST 2013},

  month        = {Tue Dec 10 00:00:00 EST 2013}

}

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