The CMB derivatives of Planck's beam asymmetry

Ben Rathaus, Ely D. Kovetz

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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 languageEnglish
Pages (from-to)750-754
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
StatePublished - 1 Jan 2014
Externally publishedYes


  • Cosmic background radiation
  • Cosmology: observations
  • Cosmology: theory

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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