Lunch Seminars

Understanding and Flattening the Wrinkles in the Universe

by Mark Neyrinck (Johns Hopkins University)

Monday, 11 March 2013 from to (US/Central)
at ANL, Bldg. 362 ( F-108 )
Structures ("wrinkles") in the Universe like filaments and haloes are essential components of the arrangement of matter on large scales.  They form in analogy to the origami-folding of a "sheet" of dark matter, and I will discuss some recent advances in modeling this process.  While these structures are fascinating, and conveniently allow observers like us to exist, they also make it harder to extract cosmological information on nonlinear scales.  In particular, sharp peaks greatly diminish the power of conventional clustering statistics in cosmology.  I will discuss how largely to fix them with Gaussianization.