# Speeding up the detectability of the harmonic-space galaxy bispectrum

@article{Montanari2021SpeedingUT, title={Speeding up the detectability of the harmonic-space galaxy bispectrum}, author={Francesco Montanari and Stefano Camera}, journal={Journal of Cosmology and Astroparticle Physics}, year={2021}, volume={2021}, pages={002 - 002} }

We present a method that allows us for the first time to estimate the signal-to-noise ratio (SNR) of the harmonic-space galaxy bispectrum induced by gravity, a complementary probe to already well established Fourier-space clustering analyses. We show how to do it considering only ∼1000 triangle configurations in multipole space, corresponding to a computational speedup of a factor 𝒪(102)−𝒪(103), depending on the redshift bin, when including mildly non-linear scales. Assuming observational…

## 3 Citations

Detecting the relativistic bispectrum in 21cm intensity maps

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2021

We investigate the detectability of leading-order relativistic effects in the bispectrum of future 21cm intensity mapping surveys. The relativistic signal arises from Doppler and other line-of-sight…

Full-sky bispectrum in redshift space for 21cm intensity maps

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2020

We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift…

Weak Lensing Trispectrum and Kurt-Spectra

- Physics
- 2021

We introduce two kurt-spectra to probe fourth-order statistics of weak lensing convergence maps. Using state-of-the-art numerical simulations, we study the shapes of these kurt-spectra as a function…

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