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arXiv · 0801.1180

Simulations of galactic disks including a dark baryonic component

Y. Revaz·D. Pfenniger·F. Combes·F. Bournaud
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Abstract

$Λ$CDM numerical simulations predict that the "missing baryons" reside in a Warm-Hot gas phase in the over-dense cosmic filaments. However, there are now several theoretical and observational arguments that support the fact that galactic disks may be more massive than usually thought, containing a substantial fraction of the "missing baryons". Hereafter, we present new N-body simulations of galactic disks, where the gas content has been multiplied by a factor 5. The stability of the disk is ensured by assuming that the ISM is composed out of two partially coupled phases, a warm phase, corresponding the observed CO and HI gas and a cold collisionless phase corresponding to the unseen baryons.

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Y. Revaz, D. Pfenniger, F. Combes, F. Bournaud. 2008-01-08. Simulations of galactic disks including a dark baryonic component. https://doi.org/10.1051/0004-6361%2F200809883

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