The CMB derivatives of Planck's beam asymmetry

Ben Rathaus; Ely D. Kovetz

doi:10.1093/mnras/stu1214

The CMB derivatives of Planck's beam asymmetry

Ben Rathaus, Ely D. Kovetz

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We investigate the anisotropy in cosmic microwave background Planck maps due to the coupling between its beam asymmetry and uneven scanning strategy. Introducing a pixel space estimator based on the temperature gradients, we find a highly significant (~20σ) preference for these to point along ecliptic latitudes. We examine the scale dependence, morphology and foreground sensitivity of this anisotropy, as well as the capability of detailed Planck simulations to reproduce the effect, which is crucial for its removal, as we demonstrate in a search for the weak-lensing signature of cosmic defects.

Original language	English
Pages (from-to)	750-754
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	443
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stu1214
State	Published - 1 Jan 2014
Externally published	Yes

Keywords

Cosmic background radiation
Cosmology: observations
Cosmology: theory

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stu1214

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KW - Cosmic background radiation

KW - Cosmology: observations

KW - Cosmology: theory

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The CMB derivatives of Planck's beam asymmetry

Abstract

Keywords

ASJC Scopus subject areas

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