Statistics of nonpolarized points in the CMB polarization maps

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Statistics of nonpolarized points in the CMB polarization maps. / Kasak, Jaan; Creswell, James; Naselsky, Pavel; Liu, Hao.

I: Physical Review D, Bind 104, Nr. 2, 023502, 02.07.2021.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Kasak, J, Creswell, J, Naselsky, P & Liu, H 2021, 'Statistics of nonpolarized points in the CMB polarization maps', Physical Review D, bind 104, nr. 2, 023502. https://doi.org/10.1103/PhysRevD.104.023502

APA

Kasak, J., Creswell, J., Naselsky, P., & Liu, H. (2021). Statistics of nonpolarized points in the CMB polarization maps. Physical Review D, 104(2), [023502]. https://doi.org/10.1103/PhysRevD.104.023502

Vancouver

Kasak J, Creswell J, Naselsky P, Liu H. Statistics of nonpolarized points in the CMB polarization maps. Physical Review D. 2021 jul. 2;104(2). 023502. https://doi.org/10.1103/PhysRevD.104.023502

Author

Kasak, Jaan ; Creswell, James ; Naselsky, Pavel ; Liu, Hao. / Statistics of nonpolarized points in the CMB polarization maps. I: Physical Review D. 2021 ; Bind 104, Nr. 2.

Bibtex

@article{7430a6d038e5400db7f0a678685f8b1f,
title = "Statistics of nonpolarized points in the CMB polarization maps",
abstract = "The nonpolarized points (NPP) of the Q and U Stokes parameters of the CMB can be classified according to the geometry of the polarization field. We describe a procedure to identify these points in the pixelized sky and present the shape of the polarization angles in the vicinity of NPPs. We design a test of Gaussianity using the Kullback-Leibler divergence. We show that the total number density of nonpolarized points of the E and B families is closely related to the presence of lensing and the tensor-to-scalar ratio r. We further show that in the absence of lensing, the total number of NPPs of all types does not depend on r, while the lensing effect removes this degeneracy. This analysis is applied to the CMB maps from the 2018 Planck release. We show that there is a general consistency of SMICA and NILC maps compared to a reference set of Gaussian simulations. The strongest discrepancies are found in the Commander (with corresponding p value 0.07) and SEVEM (p = 0.01) maps.",
author = "Jaan Kasak and James Creswell and Pavel Naselsky and Hao Liu",
year = "2021",
month = jul,
day = "2",
doi = "10.1103/PhysRevD.104.023502",
language = "English",
volume = "104",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "2",

}

RIS

TY - JOUR

T1 - Statistics of nonpolarized points in the CMB polarization maps

AU - Kasak, Jaan

AU - Creswell, James

AU - Naselsky, Pavel

AU - Liu, Hao

PY - 2021/7/2

Y1 - 2021/7/2

N2 - The nonpolarized points (NPP) of the Q and U Stokes parameters of the CMB can be classified according to the geometry of the polarization field. We describe a procedure to identify these points in the pixelized sky and present the shape of the polarization angles in the vicinity of NPPs. We design a test of Gaussianity using the Kullback-Leibler divergence. We show that the total number density of nonpolarized points of the E and B families is closely related to the presence of lensing and the tensor-to-scalar ratio r. We further show that in the absence of lensing, the total number of NPPs of all types does not depend on r, while the lensing effect removes this degeneracy. This analysis is applied to the CMB maps from the 2018 Planck release. We show that there is a general consistency of SMICA and NILC maps compared to a reference set of Gaussian simulations. The strongest discrepancies are found in the Commander (with corresponding p value 0.07) and SEVEM (p = 0.01) maps.

AB - The nonpolarized points (NPP) of the Q and U Stokes parameters of the CMB can be classified according to the geometry of the polarization field. We describe a procedure to identify these points in the pixelized sky and present the shape of the polarization angles in the vicinity of NPPs. We design a test of Gaussianity using the Kullback-Leibler divergence. We show that the total number density of nonpolarized points of the E and B families is closely related to the presence of lensing and the tensor-to-scalar ratio r. We further show that in the absence of lensing, the total number of NPPs of all types does not depend on r, while the lensing effect removes this degeneracy. This analysis is applied to the CMB maps from the 2018 Planck release. We show that there is a general consistency of SMICA and NILC maps compared to a reference set of Gaussian simulations. The strongest discrepancies are found in the Commander (with corresponding p value 0.07) and SEVEM (p = 0.01) maps.

U2 - 10.1103/PhysRevD.104.023502

DO - 10.1103/PhysRevD.104.023502

M3 - Journal article

VL - 104

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 2

M1 - 023502

ER -

ID: 276328045