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Imprint of primordial non-Gaussianity on dark matter halo profiles

Dodelson, Scott
Published in Physical Review. D. 2013, vol. 88, no. 6
Abstract We study the impact of primordial non-Gaussianity on the density profile of dark matter halos by using the semianalytical model introduced recently by Dalal et al. which relates the peaks of the initial linear density field to the final density profile of dark matter halos. Models with primordial non-Gaussianity typically produce an initial density field that differs from that produced in Gaussian models. We use the path-integral formulation of excursion set theory to calculate the non-Gaussian corrections to the peak profile and derive the statistics of the peaks of the non-Gaussian density field. In the context of the semianalytic model for halo profiles, currently allowed values for primordial non-Gaussianity would increase the shapes of the inner dark matter profiles, but only at the sub-percent level except in the very innermost regions.
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MORADINEZHAD DIZGAH, Azadeh, DODELSON, Scott, RIOTTO, Antonio Walter. Imprint of primordial non-Gaussianity on dark matter halo profiles. In: Physical Review. D, 2013, vol. 88, n° 6. https://archive-ouverte.unige.ch/unige:36479

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Deposited on : 2014-05-12

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