Effects of weak lensing on the topology of cosmic microwave background maps

Jens Schmalzing, Masahiro Takada, Toshifumi Futamase

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We investigate the non-Gaussian signatures in cosmic microwave background maps induced by the intervening large-scale structure through weak lensing. In order to measure the deviation from the Gaussian behavior of the intrinsic temperature anisotropies, we use a family of three morphological descriptors, the so-called Minkowski functionals. We show analytically how these quantities depend on the temperature threshold and compare the results to numerical experiments including the instrumental effects of Planck. Minkowski functionals can directly measure the statistical properties of the displacement field and hence provide useful constraints on large-scale structure formation in the past.

Original languageEnglish
Pages (from-to)L83-L86
JournalAstrophysical Journal
Volume544
Issue number2 PART 2
DOIs
Publication statusPublished - 2000 Dec 1

Keywords

  • Cosmic microwave background
  • Dark matter
  • Gravitational lensing
  • Large-scale structure of universe
  • Methods: statistical

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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