期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 382, 期 3, 页码 1261-1267出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2007.12458.x
关键词
galaxies : clusters : general; cosmology : theory; early Universe; large-scale structure of Universe
We have performed high-resolution cosmological N-body simulations of a concordance Lambda CDM model to study the evolution of virialized, dark matter haloes in the presence of primordial non-Gaussianity. Following a standard procedure, departures from Gaussianity are modelled through a quadratic Gaussian term in the primordial gravitational potential, characterized by a dimensionless non-linearity strength parameter f(NL). We find that the halo mass function and its redshift evolution closely follow the analytic predictions of Matarrese, Verde & Jimenez. The existence of precise analytic predictions makes the observation of rare, massive objects at large redshift an even more attractive test to detect primordial non-Gaussian features in the large-scale structure of the Universe.
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