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Reconstruction of a direction-dependent primordial power spectrum from Planck CMB data

Abstract:

We consider the possibility that the primordial curvature perturbation is direction-dependent. To first order this is parameterised by a quadrupolar modulation of the power spectrum and results in statistical anisotropy of the CMB, which can be quantified using `bipolar spherical harmonics'. We compute these for the Planck DR2-2015 SMICA map and estimate the noise covariance from Planck Full Focal Plane 9 simulations. A constant quadrupolar modulation is detected with 2.2 σ significance, drop...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted Manuscript

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Publisher copy:
10.1088/1475-7516/2018/02/012

Authors


Durakovic, A More by this author
Mukherjee, S More by this author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Theoretical Physics
Oxford college:
Linacre College
ORCID:
0000-0002-3542-858X
Souradeep, T More by this author
Danish National Research Foundation More from this funder
Simons Foundation More from this funder
French National Research Agency More from this funder
Publisher:
Institute of Physics Publisher's website
Journal:
Journal of Cosmology and Astroparticle Physics Journal website
Volume:
2018
Issue:
February
Pages:
Article: 012
Publication date:
2018-02-07
Acceptance date:
2018-01-27
DOI:
EISSN:
1475-7516
Pubs id:
pubs:824297
URN:
uri:15885975-9907-4a18-a20e-ec464b57d8e4
UUID:
uuid:15885975-9907-4a18-a20e-ec464b57d8e4
Local pid:
pubs:824297
Language:
English
Keywords:

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