Probing Cosmology with Minkowski Functionals of Weak Lensing Maps

Details Probing Cosmology with Minkowski Functionals of Weak Lensing Maps Probing Cosmology with Minkowski Functionals of Weak Lensing Maps

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21722502k&link_type=abstract

American Astronomical Society, AAS Meeting #217, #225.02; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

Minkowski functionals (MFs) are alternative probes of non-Gaussianity of random fields and probe the morphology and topology. We apply them to constrain cosmological parameters from weak gravitational lensing maps. We use MFs with Monte Carlo-optimized threshold bins to distinguish between different cosmological models from simulated convergence maps. We find that MFs discern better than the power spectrum from the same maps, thus providing evidence that they probe nonlinear structure formation and measure information beyond the power spectrum. The lensing maps were created with our new huge Inspector Gadget lensing simulation pipeline on the IBM Blue Gene at Brookhaven National Laboratory, allowing us to create an extensive simulation suite of ninety 5123-particle N-body simulations and sample many cosmological models and initial conditions.

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