Corpus ID: 236635481

A fast estimator for quantifying the shape dependence of the bispectrum

  title={A fast estimator for quantifying the shape dependence of the bispectrum},
  author={Abinash Kumar Shaw and Somnath Bharadwaj and Debanjan Sarkar and Arindam Mazumdar and Sukhdeep Singh and Suman Majumdar},
The dependence of the bispectrum on the size and shape of the triangle contains a wealth of cosmological information. Here we consider a triangle parameterization which allows us to separate the size and shape dependence. We have implemented an FFT based fast estimator for the bin averaged bispectrum, and we demonstrate that it allows us to study the variation of the bispectrum across triangles of all possible shapes (and also sizes). The computational requirement is shown to scale as ∼ N3 g… Expand
1 Citations
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