Faint dwarfs as a test of DM models: WDM vs. CDM

Abstract

We use high resolution Hydro$+$N-Body cosmological simulations to compare the assembly and evolution of a small field dwarf (stellar mass ~ 10${}^{6-7}$ M$\odot$, total mass 10${}^{10}$ M$\odot$ in $\Lambda$ dominated CDM and 2keV WDM cosmologies. We find that star formation (SF) in the WDM model is reduced and delayed by 1-2 Gyr relative to the CDM model, independently of the details of SF and feedback. Independent of the DM model, but proportionally to the SF efficiency, gas outflows lower the central mass density through `dynamical heating', such that all realizations have circular velocities $<$ 20kms at 500 pc, in agreement with local kinematic constraints. As a result of dynamical heating, older stars are less centrally concentrated than younger stars, similar to stellar population gradients observed in nearby dwarf galaxies. Introducing an important diagnostic of SF and feedback models, we translate our simulations into artificial color-magnitude diagrams and star formation histories in order to directly compare to available observations. The simulated galaxies formed most of their stars in many $\sim$10 Myr long bursts. The CDM galaxy has a global SFH, HI abundance and Fe/H and alpha-elements distribution well matched to current observations of dwarf galaxies. These results highlight the importance of directly including `baryon physics' in simulations when 1) comparing predictions of galaxy formation models with the kinematics and number density of local dwarf galaxies and 2) differentiating between CDM and non-standard models with different DM or power spectra.

arXiv comment13 pages including Appendix on Color Magnitude Diagrams. Accepted by MNRAS. Added one plot and details on ChaNGa implementation. Reduced number of citations after editorial request

References in corpus (94)

• On the variation of the Initial Mass Function
• The cosmological simulation code GADGET-2
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• Observational evidence for self-interacting cold dark matter
• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• The observed properties of dwarf galaxies in and around the Local Group
• Galaxies on FIRE (Feedback In Realistic Environments): Stellar Feedback Explains Cosmologically Inefficient Star Formation
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• Star Formation Histories, Abundances and Kinematics of Dwarf Galaxies in the Local Group
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
• A model for cosmological simulations of galaxy formation physics
• Constraining Warm Dark Matter candidates including sterile neutrinos and light gravitinos with WMAP and the Lyman-alpha forest
• Resolving the Structure of Cold Dark Matter Halos
• Ahf: Amiga's Halo Finder
• How supernova feedback turns dark matter cusps into cores
• Warm Dark Matter as a solution to the small scale crisis: new constraints from high redshift Lyman-alpha forest data
• Star Formation and Feedback in Smoothed Particle Hydrodynamic Simulations--I. Isolated Galaxies
• Gasoline: An adaptable implementation of TreeSPH
• Accurate masses for dispersion-supported galaxies
• Cuspy No More: How Outflows Affect the Central Dark Matter and Baryon Distribution in Lambda CDM Galaxies
• Gravitationally Consistent Halo Catalogs and Merger Trees for Precision Cosmology
• Numerical Methods of Star Formation History Measurement and Applications to Seven Dwarf Spheroidals
• The ACS Nearby Galaxy Survey Treasury
• Beyond Collisionless Dark Matter: Particle Physics Dynamics for Dark Matter Halo Structure
• The dependence of dark matter profiles on the stellar to halo mass ratio: a prediction for cusps vs cores
• Making Galaxies in a Cosmological Context: The Need for Early Stellar Feedback
• Cusp-core transformations in dwarf galaxies: observational predictions
• Dark and luminous matter in THINGS dwarf galaxies
• A General Class of Lagrangian Smoothed Particle Hydrodynamics Methods and Implications for Fluid Mixing Problems
• The Enrichment of the Intergalactic Medium with Adiabatic Feedback I: Metal Cooling and Metal Diffusion
• The haloes of bright satellite galaxies in a warm dark matter universe
• Dark matter and cosmic structure
• Stellar Feedback in Dwarf Galaxy Formation
• The ACS Nearby Galaxy Survey Treasury VIII. The Global Star Formation Histories of 60 Dwarf Galaxies in the Local Volume
• The ACS Nearby Galaxy Survey Treasury IX. Constraining asymptotic giant branch evolution with old metal-poor galaxies
• Why Baryons Matter: The Kinematics of Dwarf Spheroidal Satellites
• Cold dark matter heats up
• Dark Matter Self-Interactions and Light Force Carriers
• Nonlinear Evolution of Cosmological Structures in Warm Dark Matter Models
• The AGORA High-Resolution Galaxy Simulations Comparison Project
• The Formation of a Realistic Disk Galaxy in Lambda Dominated Cosmologies
• The Baryon Content of Extremely Low Mass Dwarf Galaxies
• Too Big to Fail in the Local Group
• Hierarchical formation of bulgeless galaxies: Why outflows have low angular momentum
• Disk Galaxy Formation in a LambdaCDM Universe
• The coupling between the core/cusp and missing satellite problems
• Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter
• Forming a Large Disc Galaxy from a z<1 Major Merger
• A Superbubble Feedback Model for Galaxy Simulations
• The Nature of Starbursts: I. The Star Formation Histories of Eighteen Nearby Starburst Dwarf Galaxies
• Leo A: A Late-Blooming Survivor of the Epoch of Reionization in the Local Group
• A Density Independent Formulation of Smoothed Particle Hydrodynamics
• The ACS LCID project. III. The star formation history of the Cetus dSph galaxy: a post-reionization fossil
• Reproducing the Stellar Mass/Halo Mass Relation in Simulated LCDM Galaxies: Theory vs Observational Estimates
• The Star Formation Histories of Local Group Dwarf Galaxies II. Searching For Signatures of Reionization
• Dark Matter Halo Merger Histories Beyond Cold Dark Matter: I - Methods and Application to Warm Dark Matter
• Multiphase Smoothed-Particle Hydrodynamics
• The velocity width function of galaxies from the 40% ALFALFA survey: shedding light on the cold dark matter overabundance problem
• The dynamics of isolated Local Group galaxies
• Extreme Emission Line Galaxies in CANDELS: Broad-Band Selected, Star-Bursting Dwarf Galaxies at z>1
• Spectroscopy of Red Giants in the LMC Bar: Abundances, Kinematics, and the Age-Metallicity Relation
• Resolving mixing in Smoothed Particle Hydrodynamics
• The Baryon Cycle of Dwarf Galaxies: Dark, Bursty, Gas-Rich Polluters
• The Warm DM halo mass function below the cut-off scale
• The Impact of Feedback on Disk Galaxy Scaling Relations
• Ultra-faint Ultraviolet Galaxies at z~2 Behind the Lensing Cluster Abell 1689: the Luminosity Function, Dust Extinction and Star Formation Rate Density
• Cusp-core transformations induced by AGN feedback in the progenitors of cluster galaxies
• The ACS LCID project. V. The Star Formation History of the Dwarf Galaxy \objectname[]{LGS-3}: Clues for Cosmic Reionization and Feedback
• Dark Matter Heating and Early Core Formation in Dwarf Galaxies
• Angular momentum transport and disk morphology in SPH simulations of galaxy formation
• VLA-ANGST: A high-resolution HI Survey of Nearby Dwarf Galaxies
• Warm dark matter does not do better than cold dark matter in solving small-scale inconsistencies
• Galaxy Formation in WDM Cosmology
• Low-mass galaxy assembly in simulations: regulation of early star formation by radiation from massive stars
• Hubble Space Telescope Grism Spectroscopy of Extreme Starbursts Across Cosmic Time: The Role of Dwarf Galaxies in the Star Formation History of the Universe
• Focusing on Warm Dark Matter with Lensed High-redshift Galaxies
• Comparing the Dark Matter Halos of Spiral, Low Surface Brightness and Dwarf Spheroidal Galaxies
• Measuring Galaxy Star Formation Rates From Integrated Photometry: Insights from Color-Magnitude Diagrams of Resolved Stars
• Cosmological Zoom Simulations of z = 2 Galaxies: The Impact of Galactic Outflows
• Calibrating an updated SPH scheme within GCD+
• The effect of models of the interstellar media on the central mass distribution of galaxies
• The nature of HI absorbers in GRB afterglows: clues from hydrodynamic simulations
• Ruling out the power-law form of the scalar primordial spectrum
• Simulating disc galaxy bulges that are consistent with observed scaling relations
• Dark MaGICC: the effect of Dark Energy on galaxy formation. Cosmology does matter
• MaGICC-WDM: the effects of warm dark matter in hydrodynamical simulations of disc galaxy formation
• Kinematic Evolution of Simulated Star-Forming Galaxies
• Building the Stellar Halo Through Feedback in Dwarf Galaxies
• Running with BICEP2: Implications for Small-Scale Problems in CDM
• The main sequence of star-forming galaxies at z~0.6: reinstating major mergers
• Reversal of Fortune: Increased Star Formation Efficiencies in the Early Histories of Dwarf Galaxies?
• The ages of stellar populations in a warm dark matter universe
• Constraining Warm Dark Matter with high-$z$ supernova lensing

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• A unified solution to the small scale problems of the $\Lambda$CDM model II: introducing parent-satellite interaction
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• Constraining FIMP from the structure formation of the Universe: analytic mapping from $m_{\mathrm{WDM}}$
• Constraining the primordial magnetic field with dwarf galaxy simulations
• Not So Heavy Metals: Black Hole Feedback Enriches The Circumgalactic Medium
• Reionisation in sterile neutrino cosmologies
• What's in a name? Quantifying the interplay between the Definition, Orientation, and Shape of Ultra-diffuse Galaxies Using the Romulus Simulations
• The galaxy population in cold and warm dark matter cosmologies
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• Galaxy Formation in Sterile Neutrino Dark Matter Models
• The inner structure of dwarf sized halos in Warm and Cold Dark Matter cosmologies
• Warm dark matter constraints from high-$z$ Direct Collapse Black Holes using the JWST
• Local Group star formation in warm and self-interacting dark matter cosmologies
• The baryon cycle of Seven Dwarfs with superbubble feedback
• Structure formation in a mixed dark matter model with decaying sterile neutrino: the 3.5 keV X-ray line and the Galactic substructure
• Statistical challenges in the search for dark matter
• The edge of galaxy formation III: The effects of warm dark matter on Milky Way satellites and field dwarfs
• Self-Interacting Dark Matter and the Delay of Super-Massive Black Hole Growth
• Beacons In the Dark: Using Novae and Supernovae to Detect Dwarf Galaxies in the Local Universe
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• An Enhanced Massive Black Hole Occupation Fraction Predicted in Cluster Dwarf Galaxies
• Extended Stellar Components of Galaxies & the Nature of Dark Matter
• Predictions for Complex Distributions of Stellar Elemental Abundances in Low-Mass Galaxies
• Probing the nature of Dark Matter through the metal enrichment of the intergalactic medium
• Understanding Dwarf Galaxies in order to Understand Dark Matter
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• Delayed Stellar Mass Assembly in the Low Surface Brightness Dwarf Galaxy KDG215
• Effects of Angular Momentum on Halo Profiles
• Fingerprint matching of beyond-WIMP dark matter: neural network approach
• Halo heating from fluctuating gas in a model dwarf
• The Formation of Dwarf Galaxy Disks
• The Role of Mass and Environment on Satellite distributions around Milky Way analogs in the Romulus25 simulation
• LYRA II: Cosmological dwarf galaxy formation with inhomogeneous Population III enrichment