Home » News & Blogs » Baryonification – Dark matter N-body simulations and the impact of gas-trophysics
Bookmark and Share
astrobites

Baryonification – Dark matter N-body simulations and the impact of gas-trophysics

27 Jan 2020, 19:09 UTC
Baryonification – Dark matter N-body simulations and the impact of gas-trophysics
(200 words excerpt, click title or image to see full post)

Title: A new method to quantify the effect of baryons on the matter power spectrumAuthors: Aurel Schneider and Romain TeyssierFirst Author’s Institution: Institute for Computational Science, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, SwitzerlandStatus: Published in the Journal of Cosmology and Astroparticle Physics (JCAP), closed accessThe standard model of cosmology (ΛCDM) tells us the matter content of the universe with exquisite precision. Matter can be broken up into two chunks: normal, visible, matter including galaxies, stars, and gas that we know and love in the night sky, and the other much larger piece – invisible dark matter. The visible matter is referred to as “baryonic” (as in, made of baryons), and comes along with all the rich physics of fluids, thermodynamics, and radiation. In contrast, dark matter (at least, the cold kind) is extremely simple. Dark matter only interacts gravitationally, and this simple fact allows for very accurate simulation of dark matter dynamics using Newtonian gravity N-body simulations.Dark-matter-only N-body simulations are excellent for describing the formation of dense dark matter halos, where galaxy formation takes place, but do not tell us anything about galaxy formation or its effects, where normal baryonic matter plays a large role. To accurately capture the ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day

astronomy_pod