LYRA II: Cosmological dwarf galaxy formation with inhomogeneous Population III enrichment

Abstract

We present the simulation of a $2\times 10^9{M}_{\odot }$ halo mass cosmological dwarf galaxy run to $z=0$ at 4 solar mass gas resolution with resolved supernova feedback. We compare three simple subgrid implementations for the inhomogeneous chemical enrichment from Population III stars and compare them to constraints from Local Group dwarf galaxies. The employed model, LYRA, is a novel high resolution galaxy formation model built for the moving mesh code AREPO, which is marked by a resolved multi-phase interstellar medium, single stars and individual supernova events. The resulting reionization relic is characterized by a short ($<1.5$ Gyr) star formation history that is repeatedly brought to a standstill by violent bursts of feedback. Star formation is reignited for a short duration due to a merger at $z\approx 4$ and then again at $z\approx 0.2-0$ after sustained gas accretion. Our model $z=0$ galaxy matches the stellar mass, size, stellar kinematics and metallicity relations of Local Group dwarf galaxies well. The dark matter profile does not exhibit a core in any version of the model. We show that the host halo masses of Population III stars affect the assembly history of dwarf galaxies. This manifests itself through the initial gaseous collapse in the progenitor halos, affecting the central density of the stellar component and through the accretion of luminous substructure.

arXiv comment15 pages, 13 figures, published in MNRAS

References in corpus (87)

• The chemical composition of the Sun
• On the variation of the Initial Mass Function
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• The observed properties of dwarf galaxies in and around the Local Group
• Planck 2013 results. I. Overview of products and scientific results
• GADGET: A code for collisionless and gasdynamical cosmological simulations
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• From dwarf spheroidals to cDs: Simulating the galaxy population in a LCDM cosmology
• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• 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
• Minor mergers and the size evolution of elliptical galaxies
• Cosmological Simulations with TreeSPH
• The First Stars
• How supernova feedback turns dark matter cusps into cores
• Observational and Theoretical Constraints on Singular Dark Matter Halos
• Theoretical Challenges in Galaxy Formation
• The Faintest Dwarf Galaxies
• On the evolution of the HI column density distribution in cosmological simulations
• The Star Formation Histories of Local Group Dwarf Galaxies I. Hubble Space Telescope / Wide Field Planetary Camera 2 Observations
• The dependence of dark matter profiles on the stellar to halo mass ratio: a prediction for cusps vs cores
• The Birth of a Galaxy: Primordial Metal Enrichment and Stellar Populations
• A Faint New Milky Way Satellite in Bootes
• The Arepo public code release
• Cusp-core transformations in dwarf galaxies: observational predictions
• Momentum Injection by Supernovae in the Interstellar Medium
• Forged in FIRE: cusps, cores, and baryons in low-mass dwarf galaxies
• Simulations of Pregalactic Structure Formation with Radiative Feedback
• A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite?
• The Impact of Baryonic Physics on the Structure of Dark Matter Halos: the View from the FIRE Cosmological Simulations
• Improving the convergence properties of the moving-mesh code AREPO
• Kinematics in Young Star Clusters and Associations with Gaia DR2
• Formation of the First Stars
• RAMSES-RT: Radiation hydrodynamics in the cosmological context
• Cold dark matter heats up
• NIHAO IV: Core creation and destruction in dark matter density profiles across cosmic time
• Three-phase Interstellar medium in Galaxies Resolving Evolution with Star formation and Supernova feedback (TIGRESS): Algorithms, Fiducial model, and Convergence
• FIRE in the Field: Simulating the Threshold of Galaxy Formation
• The coupling between the core/cusp and missing satellite problems
• High-resolution rotation curves of low surface brightness galaxies: Data
• A Cosmic UV/X-ray Background Model Update
• The stellar mass-halo mass relation of isolated field dwarfs: a critical test of $\Lambda$CDM at the edge of galaxy formation
• Be it therefore resolved: Cosmological Simulations of Dwarf Galaxies with Extreme Resolution
• Reproducing the Stellar Mass/Halo Mass Relation in Simulated LCDM Galaxies: Theory vs Observational Estimates
• Modelling the supernova-driven ISM in different environments
• EDGE: the mass-metallicity relation as a critical test of galaxy formation physics
• Star formation and molecular hydrogen in dwarf galaxies: a non-equilibrium view
• Connecting the first galaxies with ultra faint dwarfs in the Local Group: chemical signatures of Population~III stars
• Variable interstellar radiation fields in simulated dwarf galaxies: supernovae versus photoelectric heating
• A new way of setting the phases for cosmological multi-scale Gaussian initial conditions
• Heavy-element yields and abundances of Asymptotic Giant Branch models with a Small Magellanic Cloud metallicity
• Radiative cooling rates, ion fractions, molecule abundances and line emissivities including self-shielding and both local and metagalactic radiation fields
• The no-spin zone: rotation vs dispersion support in observed and simulated dwarf galaxies
• NIHAO IX: the role of gas inflows and outflows in driving the contraction and expansion of cold dark matter haloes
• The Influence of Streaming Velocities on the Formation of the First Stars
• Faint dwarfs as a test of DM models: WDM vs. CDM
• The influence of streaming velocities and Lyman-Werner radiation on the formation of the first stars
• Cradles of the first stars: self-shielding, halo masses, and multiplicity
• No cores in dark matter-dominated dwarf galaxies with bursty star formation histories
• What is the (Dark) Matter with Dwarf Galaxies?
• The effect of feedback and reionization on star formation in low-mass dwarf galaxy haloes
• EDGE: From quiescent to gas-rich to star-forming low-mass dwarf galaxies
• EDGE: The origin of scatter in ultra-faint dwarf stellar masses and surface brightnesses
• LYRA I: Simulating the multi-phase ISM of a dwarf galaxy with variable energy supernovae from individual stars
• On the velocity dispersion of young star clusters: super-virial or binaries?
• NIHAO XX: The impact of the star formation threshold on the cusp-core transformation of cold dark matter haloes
• Low-mass galaxy assembly in simulations: regulation of early star formation by radiation from massive stars
• Reignition of Star Formation in Dwarf Galaxies
• EDGE: Two routes to dark matter core formation in ultra-faint dwarfs
• An observer's guide to the (Local Group) dwarf galaxies: predictions for their own dwarf satellite populations
• The edge of galaxy formation I: formation and evolution of MW-satellites analogues before accretion
• The Ultimately Large Telescope -- what kind of facility do we need to detect Population III stars?
• NIHAO -- XXV. Convergence in the cusp-core transformation of cold dark matter haloes at high star formation thresholds
• The edge of galaxy formation II: evolution of Milky Way satellite analogues after infall
• The 3-D Kinematics of the Orion Nebula Cluster: NIRSPEC-AO Radial Velocities of the Core Population
• Solo dwarfs II: The stellar structure of isolated Local Group dwarf galaxies
• Solo Dwarfs I: Survey introduction and first results for the Sagittarius Dwarf Irregular Galaxy
• EDGE: The sensitivity of ultra-faint dwarfs to a metallicity-dependent initial mass function
• Globular Clusters and Streaming Velocities: Testing the new formation channel in high-resolution cosmological simulations
• Runaway stars masquerading as star formation in galactic outskirts
• Solo dwarfs IV: Comparing and contrasting satellite and isolated dwarf galaxies in the Local Group
• Detectability of Local Group Dwarf Galaxy Analogues at High Redshifts
• NIHAO-LG: The uniqueness of Local Group dwarf galaxies