Estimating the Integrated Bispectrum from Weak Lensing Maps.
作者： J. D. McEwen , J. Stadel , D. Munshi , R. Teyssier , T. Kitching
DOI: 10.1088/1475-7516/2020/05/043
关键词:
摘要: We use a recently introduced statistic called {\em Integrated Bispectrum} (IB) to probe the gravity-induced non-Gaussianity at level of bispectrum from weak lensing convergence or $\kappa$ maps. generalize concept IB spherical coordinates. This result is next connected response function approach. Finally, we Euclid Flagship simulations compute as redshift and wave number. also outline how can be computed using variety analytical approaches including ones based on Effective Field Theory (EFT), Halo models} models Separate Universe approach} in projection two-dimension (2D). Comparing these results against find that existing theoretical tend over-predict numerical value IB. emphasize role finite volume effect estimation squeezed collapsed tripsectrum for 2D derive many parameterized theories modified gravity Horndeskii beyond-Horndeskii specifically non-degenerate scenarios are known Gleyzes-Langlois-Piazza-Venizzi GPLV theories. In addition, cosmological with clustering quintessence involving massive neutrinos derived.
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