Relative baryon-dark matter velocities in cosmological zoom simulations

Abstract

Supersonic relative motion between baryons and dark matter due to the decoupling of baryons from the primordial plasma after recombination affects the growth of the first small-scale structures. Large box sizes (greater than a few hundred Mpc) are required to sample the full range of scales pertinent to the relative velocity, while the effect of the relative velocity is strongest on small scales (less than a few hundred kpc). This separation of scales naturally lends itself to the use of `zoom' simulations, and here we present our methodology to self-consistently incorporate the relative velocity in zoom simulations, including its cumulative effect from recombination through to the start time of the simulation. We apply our methodology to a large-scale cosmological zoom simulation, finding that the inclusion of relative velocities suppresses the halo baryon fraction by $46$--$23$ per cent between $z=13.6$ and $11.2$, in qualitative agreement with previous works. In addition, we find that including the relative velocity delays the formation of star particles by $\sim 20\mathrm{Myr}$ Myr on average (of the order of the lifetime of a $\sim 9{\mathrm{M}}_{\odot }$ Population III star) and suppresses the final stellar mass by as much as $79$ per cent at $z=11.2$.

arXiv comment14 pages, 12 figures. Accepted for publication in MNRAS

References in corpus (64)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The cosmological simulation code GADGET-2
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Efficient Computation of CMB anisotropies in closed FRW models
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• A Multi-Code Analysis Toolkit for Astrophysical Simulation Data
• Ahf: Amiga's Halo Finder
• On the properties of massive Population III stars and metal-free stellar populations
• Multi-scale initial conditions for cosmological simulations
• Fundamental differences between SPH and grid methods
• Gravitationally Consistent Halo Catalogs and Merger Trees for Precision Cosmology
• A New Calculation of the Recombination Epoch
• Relative velocity of dark matter and baryonic fluids and the formation of the first structures
• The evolution substructure I: a new identification method
• Multiscale Gaussian Random Fields for Cosmological Simulations
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• The halo mass function through the cosmic ages
• On the onset of galactic winds in quiescent star forming galaxies
• Impact of the Relative Motion between the Dark Matter and Baryons on the First Stars
• The signature of the first stars in atomic hydrogen at redshift 20
• Constraining Baryon--Dark Matter Scattering with the Cosmic Dawn 21-cm Signal
• The Delay of Population III Star Formation by Supersonic Streaming Velocities
• The 21-cm signature of the first stars during the Lyman-Werner feedback era
• How to Zoom: Bias, Contamination, and Lagrange Volumes in Multimass Cosmological Simulations
• Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars
• Suppression and Spatial Variation of Early Galaxies and Minihalos
• Towards a complete treatment of the cosmological recombination problem
• Supersonic Gas Streams Enhance the Formation of Massive Black Holes in the Early Universe
• The Impact of the First Galaxies on Cosmic Dawn and Reionization
• Large-scale BAO signatures of the smallest galaxies
• The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology
• Growth of Linear Perturbations before the Era of the First Galaxies
• Simulations of Early Baryonic Structure Formation with Stream Velocity: II. The Gas Fraction
• The impact of the supersonic baryon-dark matter velocity difference on the z~20 21cm background
• The impact of primordial supersonic flows on early structure formation, reionization and the lowest-mass dwarf galaxies
• The formation of direct collapse black holes under the influence of streaming velocities
• The Influence of Streaming Velocities on the Formation of the First Stars
• Simulations of Early Baryonic Structure Formation with Stream Velocity: I. Halo Abundance
• The influence of streaming velocities and Lyman-Werner radiation on the formation of the first stars
• The formation of the first cosmic structures and the physics of the z~20 Universe
• Recombinations to the Rydberg States of Hydrogen and Their Effect During the Cosmological Recombination Epoch
• The formation and gas content of high redshift galaxies and minihalos
• A new light on 21 cm intensity fluctuations from the dark ages
• Robust Velocity-induced Acoustic Oscillations at Cosmic Dawn
• On the signature of the baryon-dark matter relative velocity in the two and three-point galaxy correlation functions
• Globular Clusters and Dark Satellite Galaxies through the Stream Velocity
• Supersonic Relative Velocity between Dark Matter and Baryons: A Review
• Galaxies going MAD: The Galaxy-Finder Comparison Project
• The 21-cm BAO signature of enriched low-mass galaxies during cosmic reionization
• Constraining the Baryon-Dark Matter Relative Velocity with the Large-Scale 3-Point Correlation Function of the SDSS BOSS DR12 CMASS Galaxies
• Rhapsody-G simulations: galaxy clusters as baryonic closed boxes and the covariance between hot gas and galaxies
• Low-mass suppression of the satellite luminosity function due to the supersonic baryon--cold-dark-matter relative velocity
• Gas rich and gas poor structures through the stream velocity effect
• The Supersonic Project: Shining Light on SIGOs - a New Formation Channel for Globular Clusters
• How Density Environment Changes the Influence of the Dark Matter-Baryon Streaming Velocity on the Cosmological Structure Formation
• Signatures of First Stars in Galaxy Surveys: Multi-Tracer Analysis of the Supersonic Relative Velocity Effect and the Constraints from the BOSS Power Spectrum Measurements
• Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey
• The Supersonic Project: rotational effects of supersonic motions on the first structures in the Universe
• The Supersonic Project: To cool or not to cool Supersonically Induced Gas Objects (SIGOs)?
• Formation of First Galaxies inside Density Peaks and Voids under the Influence of Dark Matter-Baryon Streaming Velocity, I: Initial Condition and Simulation Scheme
• Shape and Spin of Minihaloes. II: The Effect of Streaming Velocities
• Resolution Convergence in Cosmological Hydrodynamical Simulations Using Adaptive Mesh Refinement

Cited by in corpus (2)

• Aeos: Transport of Metals from Minihalos following Population III Stellar Feedback
• Primordial black holes and the velocity acoustic oscillations features in 21 cm signals from the cosmic Dark Ages