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  3. POSTPONED: Relativistic cosmological large scale structures at one-loop (Dr. Clément Stahl; Pontificia Universidad Católica de Valparaíso)

POSTPONED: Relativistic cosmological large scale structures at one-loop (Dr. Clément Stahl; Pontificia Universidad Católica de Valparaíso)

In this talk, I will discuss some aspects of non-linear structure formation. The calculation of the bispectrum usually involves linear physics on large scales and non-linear (but Newtonian) physics on small scales. However, in the squeezed limit, the bispectrum (unlike the power spectrum) couples large scales with small scales. I will present the calculation of the non-linear relativistic corrections to the dynamics of dark matter perturbations. They are of the same order of magnitude, in the squeezed limit, than a primordial local non-Gaussianity signal. Such signal is expected to be within the accuracy of the next generation of LSS surveys.

Horarios: Desde Octubre 28, 2019 13:15 hasta Octubre 28, 2019 13:45

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octubre 28, 2019 - octubre 28, 2019

schedule 1:15 pm - 1:45 pm
place Lugar

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