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Modeling the anomaly of surface number densities of galaxies on the Galactic extinction map due to their FIR emission contamination
Toshiya Kashiwagi, Yasushi Suto, Atsushi Taruya +3
The most widely used Galactic extinction map (Schlegel, Finkbeiner, & Davis 1998, SFD) is constructed assuming that the observed FIR fluxes entirely come from the Galactic dust. Ac…
Response function of the large-scale structure of the universe to the small scale inhomogeneities
Takahiro Nishimichi, Francis Bernardeau, Atsushi Taruya
In order to infer the impact of the small-scale physics to the large-scale properties of the universe, we use a series of cosmological -body simulations of self-gravitating matt…
Effect of primordial non-Gaussianities on the far-UV luminosity function of high-redshift galaxies: implications for cosmic reionization
Jacopo Chevallard, Joseph Silk, Takahiro Nishimichi +3
[Abridged] Understanding how the intergalactic medium (IGM) was reionized at z > 6 is one of the big challenges of current high redshift astronomy. It requires modelling the collap…
Regularized cosmological power spectrum and correlation function in modified gravity models
Atsushi Taruya, Takahiro Nishimichi, Francis Bernardeau +2
Based on the multi-point propagator expansion, we present resummed perturbative calculations for cosmological power spectra and correlation functions in the context of modified gra…
Testing primordial non-Gaussianities on galactic scales at high redshift
Mélanie Habouzit, Takahiro Nishimichi, Sébastien Peirani +3
Primordial non-Gaussianities provide an important test of inflationary models. Although the Planck CMB experiment has produced strong limits on non-Gaussianity on scales of cluster…
Testing the equal-time angular-averaged consistency relation of the gravitational dynamics in N-body simulations
Takahiro Nishimichi, Patrick Valageas
We explicitly test the equal-time consistency relation between the angular-averaged bispectrum and the power spectrum of the matter density field, employing a large suite of cosmol…