The First Billion Years of a Warm Dark Matter Universe

Abstract

We present results of cosmological N-body hydrodynamic chemistry simulations of primordial structure growth and evolution in a scenario with warm dark matter (WDM) having a mass of 3 keV (thermal relic) and compare with a model consisting of standard cold dark matter (CDM). We focus on the high-redshift universe ($z>6$), where the structure formation process should better reflect the primordial (linear) differences in terms of matter power spectrum. We find that early epochs can be exceptional probes of the dark-matter nature. Non-linear WDM power spectra and mass functions are up to 2 dex lower than in CDM and show spreads of factor of a few persisting in the whole first Gyr. Runaway molecular cooling in WDM haloes results severely inhibited because of the damping of power at large $k$ modes and hence cosmic (population III and II-I) star formation rate (SFR) is usually suppressed with respect to CDM predictions. Luminous objects formed in a WDM background are very rare at $z>10$, due to the sparser and retarded evolution of early WDM mini-haloes during the dark ages and their lack can be fitted with a simple analytical formula depending only on magnitude and redshift. Future high-$z$ observations of faint galaxies have the potential to discriminate between CDM and WDM scenarios by means of cosmic stellar mass density (SMD) and specific SFR, as well. When compared to the effects of alternative cosmologies (e.g. non-Gaussian or dark-energy models) or of high-order corrections at large $z$ (e.g. primordial streaming motions or changes in the pristine IMF) the ones caused by WDM are definitely more dramatic.

arXiv commentMNRAS in press --- "There's only two kinds ..." https://www.youtube.com/watch?v=6YnryHbJqC4 --- High-resolution images: http://adlibitum.oats.inaf.it/maio/wdm.html

References in corpus (80)

• Stellar population synthesis at the resolution of 2003
• The cosmological simulation code GADGET-2
• Large scale bias and the peak background split
• LOFAR: The LOw-Frequency ARray
• The Nucleosynthetic Signature of Population III
• Radiative Transfer in a Clumpy Universe: II. The Utraviolet Extragalactic Background
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• Halo Formation in Warm Dark Matter Models
• Substructures in hydrodynamical cluster simulations
• Small Scale Cosmological Perturbations: An Analytic Approach
• Constraining Warm Dark Matter candidates including sterile neutrinos and light gravitinos with WMAP and the Lyman-alpha forest
• Warm Dark Matter as a solution to the small scale crisis: new constraints from high redshift Lyman-alpha forest data
• UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History
• Simulations of Early Structure Formation: Primordial Gas Clouds
• Modelling Primordial Gas in Numerical Cosmology
• UV Luminosity Functions from 132 z~7 and z~8 Lyman-Break Galaxies in the ultra-deep HUDF09 and wide-area ERS WFC3/IR Observations
• UV-continuum slopes at z~4-7 from the HUDF09+ERS+CANDELS observations: Discovery of a well-defined UV-color magnitude relationship for z>=4 star-forming galaxies
• The properties of warm dark matter haloes
• Relative velocity of dark matter and baryonic fluids and the formation of the first structures
• Keck Spectroscopy of 3<z<7 Faint Lyman Break Galaxies: The Importance of Nebular Emission in Understanding the Specific Star Formation Rate and Stellar Mass Density
• The Precision Array for Probing the Epoch of Reionization: 8 Station Results
• The Formation of the First Low-Mass Stars From Gas With Low Carbon and Oxygen Abundances
• Substructure and halo density profiles in a Warm Dark Matter Cosmology
• The haloes of bright satellite galaxies in a warm dark matter universe
• Lyman-alpha constraints on warm and on warm-plus-cold dark matter models
• Science with the Square Kilometer Array: Motivation, Key Science Projects, Standards and Assumptions
• CLASH: Three Strongly Lensed Images of a Candidate z ~ 11 Galaxy
• Chemical enrichment of galaxy clusters from hydrodynamical simulations
• Can sterile neutrinos be the dark matter?
• Quantifying the effect of baryon physics on weak lensing tomography
• A highly magnified candidate for a young galaxy seen when the Universe was 500 Myrs old
• The Characteristic Star Formation Histories of Galaxies at Redshifts z~2-7
• Nonlinear Evolution of Cosmological Structures in Warm Dark Matter Models
• Formation and structure of halos in a warm dark matter cosmology
• Low-Mass Relics of Early Star Formation
• Discreteness effects in simulations of Hot/Warm dark matter
• Evolution of Galaxy Stellar Mass Functions, Mass Densities, and Mass to Light Ratios from z 7 to z 4
• A Baryonic Solution to the Missing Satellites Problem
• Galaxies at z = 6 - 9 from the WFC3/IR imaging of the HUDF
• Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
• Early Cosmological HII/HeIII Regions and Their Impact on Second-Generation Star Formation
• The transition from population III to population II-I star formation
• The UV continua and inferred stellar populations of galaxies at z ~ 7 - 9 revealed by the Hubble Ultra Deep Field 2012 campaign
• Dark Matter Halo Merger Histories Beyond Cold Dark Matter: I - Methods and Application to Warm Dark Matter
• Feedback from Galaxy Formation: Production and Photodissociation of Primordial Molecular Hydrogen
• The Warm DM halo mass function below the cut-off scale
• Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
• Metal and molecule cooling in simulations of structure formation
• Metal and molecule cooling in simulations of structure formation
• Ultradeep Infrared Array Camera Observations of sub-L* z~7 and z~8 Galaxies in the Hubble Ultra Deep Field: the Contribution of Low-Luminosity Galaxies to the Stellar Mass Density and Reionization
• Early Structure Formation and Reionization in a Warm Dark Matter Cosmology
• The Bright End of the UV Luminosity Function at z~8: New Constraints from CANDELS Data in GOODS-South
• The interplay between chemical and mechanical feedback from the first generation of stars
• Radiative feedback from an early X-ray background
• The impact of primordial supersonic flows on early structure formation, reionization and the lowest-mass dwarf galaxies
• Formation of Massive Primordial Stars in a Reionized Gas
• Lighting the Universe with filaments
• Warm dark matter does not do better than cold dark matter in solving small-scale inconsistencies
• How cold is Dark Matter? Constraints from Milky Way Satellites
• The High-$z$ Universe Confronts Warm Dark Matter: Galaxy Counts, Reionization and the Nature of Dark Matter
• The Rest Frame UV to Optical Colors and SEDs of z~4-7 Galaxies
• Focusing on Warm Dark Matter with Lensed High-redshift Galaxies
• Simulating high-z Gamma-ray Burst host galaxies
• Early structure formation in quintessence models and its implications for cosmic reionisation from first stars
• Rate Coefficient for H^+ + H_2(X ^1Sigma_g^+, nu=0, J=0) --> H(1s) + H_2^+ Charge Transfer and Some Cosmological Implications
• Supersonic Relative Velocity between Dark Matter and Baryons: A Review
• The onset of star formation in primordial haloes
• Population III Star Formation in a Lambda WDM Universe
• Lyman-α Forest and Cosmic Weak Lensing in a Warm Dark Matter Universe
• Baryon history and cosmic star formation in non-Gaussian cosmological models: numerical simulations
• Simulated star formation rate functions at z~4-7, and the role of feedback in high-z galaxies
• Effects Of Circum-nuclear Disk Gas Evolution And The Spin Of Central Black Holes
• Counts of high-redshift GRBs as probe of primordial non-Gaussianities
• Statistical properties of mass, star formation, chemical content and rotational patterns in early z > 9 structures
• Radiative feedback and cosmic molecular gas: numerical method
• Gas distribution, metal enrichment, and baryon fraction in Gaussian and non-Gaussian universes
• Simulating extremely metal-poor gas and DLA metal content at redshift z=7
• The imprint of cosmological non-Gaussianities on primordial structure formation
• Signatures of very massive stars: supercollapsars and their cosmological rate

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• Challenges for $\Lambda$CDM: An update
• A White Paper on keV Sterile Neutrino Dark Matter
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Sterile neutrino dark matter: A tale of weak interactions in the strong coupling epoch
• The Science of the Einstein Telescope
• Improved determination of sterile neutrino dark matter spectrum
• Early galaxy formation in warm dark matter cosmologies
• Constraining the PopIII IMF with high-z GRBs
• A double take on early and interacting dark energy from JWST
• Warm dark matter signatures on the 21cm power spectrum: Intensity mapping forecasts for SKA
• A New Statistical Model for Population III Supernova Rates: Discriminating Between $\Lambda$CDM and WDM Cosmologies
• Origin of Cosmic Chemical Abundances
• JWST high-z galaxy constraints on warm and cold dark matter models
• Constraining FIMP from the structure formation of the Universe: analytic mapping from $m_{\mathrm{WDM}}$
• Reionisation in sterile neutrino cosmologies
• Formation, disruption and energy output of Population III X-ray binaries
• The galaxy population in cold and warm dark matter cosmologies
• 21-cm observations and warm dark matter models
• Atomic and molecular gas from the epoch of reionization down to redshift 2
• Radiative feedback and cosmic molecular gas: the role of different radiative sources
• Galaxy Formation in Sterile Neutrino Dark Matter Models
• The seeds of supermassive black holes and the role of local radiation and metal spreading
• PopIII signatures in the spectra of PopII/I GRBs
• Atomic and molecular gas as traced by [C II] emission
• Impact of dark matter models on the EoR 21-cm signal bispectrum
• Metal enrichment signatures of the first stars on high-z DLAs
• Degeneracies between baryons and dark matter: the challenge of constraining the nature of dark matter with JWST
• ScamPy -- A sub-halo clustering & abundance matching based Python interface for painting galaxies on the dark matter halo/sub-halo hierarchy
• Fingerprint matching of beyond-WIMP dark matter: neural network approach
• Exploration of the high-redshift universe enabled by THESEUS
• The Baryon Budget of Galaxies across the First Billion Years