Details

Autor(en) / Beteiligte

• Rathaus, Ben
• Kovetz, Ely D.

Titel

The CMB derivatives of Planck's beam asymmetry

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2014-09, Vol.443 (1), p.750-754

Ort / Verlag

London: Oxford University Press

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.