From inflation to dark matter halo profiles: the impact of primordial non-Gaussianities on the central density cusp
Journal of Cosmology and Astroparticle Physics(2024)
摘要
It has recently been shown that local primordial non-Gaussianities (PNG) with
significant amplitude (|f_ NL| ∼ 1000), at small (Mpc) scales, can
help in forming simulated galaxies with more disky baryonic kinematics than in
the Gaussian case, while generating matter power spectra that can differ by up
to 20
the consequences of such small-scale PNG on the dark matter halo profiles. We
show in particular that, for negative f_ NL, dark matter halos formed in
collisionless simulations are not always well described by the traditional
Navarro-Frenk-White (NFW) profiles, as supported by their sparsity
distribution. We conclude that NFW profiles are not as clear attractors for the
density profiles of dark matter halos in the presence of PNG than in the case
of a Gaussian contrast density field. We show how a minimal extension of the
NFW profile can describe halos both in the Gaussian and non-Gaussian cases.
From the combination of our sparsity analysis and the quality of the
adjustments of the density profiles with a minimal extension to NFW, we
conclude that z=1 halos carry the most interesting information about PNG.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要