Université de GenèveDépartement de Physique ThéoriqueCAP Genève

Relativistic galaxy number counts to second order and their bispectrum

19. December 2014
The primordial Universe after Planck (15-19 December 2014), 30th Institut d’Astrophysique de Paris Colloquium, Paris, France
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In this talk, I will present the evaluation of the galaxy number counts to second order in cosmological perturbation theory in the Poisson gauge. The calculation is performed using an innovative approach based on the recently proposed ”geodesic light-cone” gauge, which allows us to determine the number counts in a purely geometric way. To conclude, I will show the numerical results for the leading contributions to the number counts bispectrum, comparing them with the usual term from weakly non-linear Newtonian gravitational clustering.


Département de Physique Théorique
Université de Genève
24, quai Ernest Ansermet
1211 Genève 4
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