Intrinsic alignments of galaxies in weak lensing

DIPC Seminars

Bjoern Malte Schaefer, University of Heidelberg
Donostia International Physics Center
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Intrinsic alignments of galaxies in weak lensing Weak gravitational lensing is considered as a prime tool for mapping the cosmic-large scale structure as it only requires relativity for its description. One commonly works under the assumption of perfectly uncorrelated intrinsic shapes of galaxies, which is challenged by tidal interactions of galaxies which makes their shapes intrinsically correlated. In my talk I’ll introduce tidal interaction models for the two primary galaxy types, discuss what shape correlations they would evoke, and how these intrinsic correlations interfere with the interpretation of weak lensing data. Host: Raul Angulo