Linear Gas Dynamics in the Expanding Universe: Why the Jeans Scale does not Matter

Abstract

We investigate the relationship between the dark matter and baryons in the linear regime. This relation is quantified by the so-called ``filtering scale''. We show that a simple gaussian ansatz which uses the filtering scale provides a good approximation to the exact solution.

submitted to ApJ

References in corpus (5)

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• A New Precision Measurement of the Small-Scale Line-of-Sight Power Spectrum of the Ly$\alpha$ Forest
• Bias to CMB Lensing Reconstruction from Temperature Anisotropies due to Large-Scale Galaxy Motions
• A New Method to Directly Measure the Jeans Scale of the Intergalactic Medium Using Close Quasar Pairs
• Measurement of the small-scale structure of the intergalactic medium using close quasar pairs
• The Probability Distribution of the Lya transmitted flux from a sample of SDSS quasars
• Simulating intergalactic gas for DESI-like small scale Lymanα forest observations
• Cosmic Reionization On Computers III. The Clumping Factor
• Recombination clumping factor during cosmic reionization
• Dark energy effects on the Lyman-alpha forest
• Joint modeling of the probability distribution and power spectrum of the Lya forest: comparison with observations at z=3
• The Effect of Large-Scale Power on Simulated Spectra of the Lya forest
• Detecting X-ray filaments in the low redshift Universe with XEUS and Constellation-X
• Intergalactic baryon-rich regions at high redshift
• Lognormal semi-numerical simulations of the Lyman-$\alpha$ forest: comparison with full hydrodynamic simulations
• Kolmogorov complexity in the Milky Way and its reduction with warm dark matter