Boosting galactic outflows with enhanced resolution

Abstract

We study how better resolving the cooling length of galactic outflows affect their energetics. We perform radiative-hydrodynamical galaxy formation simulations of an isolated dwarf galaxy ($M_{\star }=10^8{\mathrm{M}}_{\odot }$) with the Ramses-RTZ code, accounting for non-equilibrium cooling and chemistry coupled to radiative transfer. Our simulations reach a spatial resolution of $18\mathrm{pc}$ in the interstellar medium (ISM) using a traditional quasi-Lagrangian scheme. We further implement a new adaptive mesh refinement (AMR) strategy to resolve the local gas cooling length, allowing us to gradually increase the resolution in the stellar-feedback-powered outflows, from $\ge 200\mathrm{pc}$ to $18\mathrm{pc}$. The propagation of outflows into the inner circumgalactic medium (CGM) is significantly modified by this additional resolution, but the ISM, star formation and feedback remain by and large the same. With increasing resolution in the diffuse gas, the hot outflowing phase ($T>8\times 10^4\mathrm{K}$) systematically reaches overall higher temperatures and stays hotter for longer as it propagates outwards. This leads to two-fold increases in the time-averaged mass and metal outflow loading factors away from the galaxy ($r=5\mathrm{kpc}$), a five-fold increase in the average energy loading factor, and a $\approx$50 per cent increase in the number of sightlines with $N_{\text{OVI}}\ge 10^{13}{\mathrm{cm}}^{-2}$. Such a significant boost to the energetics of outflows without new feedback mechanisms or channels strongly motivates future studies quantifying the efficiency with which better-resolved multiphase outflows regulate galactic star formation in a cosmological context.

arXiv commentMatching published version in MNRAS. Updated Fig.9 following bug correction in outflow loading factor normalisation, main conclusions unchanged. Additional robustness tests, explanations and visualisations throughout the paper following peer-review

References in corpus (108)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• The NumPy array: a structure for efficient numerical computation
• On the variation of the Initial Mass Function
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
• Physical Models of Galaxy Formation in a Cosmological Framework
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• On the Maximum Luminosity of Galaxies and Their Central Black Holes: Feedback From Momentum-Driven Winds
• The Star Formation Rate of Turbulent Magnetized Clouds: Comparing Theory, Simulations, and Observations
• Theoretical Challenges in Galaxy Formation
• Gusty, gaseous flows of FIRE: galactic winds in cosmological simulations with explicit stellar feedback
• Towards a complete accounting of energy and momentum from stellar feedback in galaxy formation simulations
• Cool Outflows in Galaxies and their Implications
• Stellar Population Effects on the Inferred Photon Density at Reionization
• Thermal Instability in Gravitationally-Stratified Plasmas: Implications for Multi-Phase Structure in Clusters and Galaxy Halos
• Thermal Instability & the Feedback Regulation of Hot Halos in Clusters, Groups, and Galaxies
• The Evolution of the Intergalactic Medium
• RAMSES-RT: Radiation hydrodynamics in the cosmological context
• A new Jeans resolution criterion for (M)HD simulations of self-gravitating gas: Application to magnetic field amplification by gravity-driven turbulence
• The growth and entrainment of cold gas in a hot wind
• The COS-Dwarfs Survey: The Carbon Reservoir Around sub-L* Galaxies
• Figuring Out Gas & Galaxies in Enzo (FOGGIE). I. Resolving Simulated Circumgalactic Absorption at 2 < z < 2.5
• Regulation of star formation in giant galaxies by precipitation, feedback, and conduction
• The SILCC (SImulating the LifeCycle of molecular Clouds) project - II. Dynamical evolution of the supernova-driven ISM and the launching of outflows
• Cosmological simulations of the circumgalactic medium with 1 kpc resolution: enhanced HI column densities
• Outflows in Infrared-Luminous Starbursts at z < 0.5. I. Sample, NaI D Spectra, and Profile Fitting
• Extended Lyman-alpha emission from cold accretion streams
• The Impact of Enhanced Halo Resolution on the Simulated Circumgalactic Medium
• A scheme for radiation pressure and photon diffusion with the M1 closure in RAMSES-RT
• Ionized outflows from active galactic nuclei as the essential elements of feedback
• Feedback-regulated star formation and escape of LyC photons from mini-haloes during reionisation
• Numerical Simulations of Multiphase Winds and Fountains from Star-Forming Galactic Disks: I. Solar Neighborhood TIGRESS Model
• Star formation at very low metallicity. I: Chemistry and cooling at low densities
• The Mass and Momentum Outflow Rates of Photoionized Galactic Outflows
• A simple multigrid scheme for solving the Poisson equation with arbitrary domain boundaries
• Superbubbles in the Multiphase ISM and the Loading of Galactic Winds
• EDGE: the mass-metallicity relation as a critical test of galaxy formation physics
• Multiphase Gas and the Fractal Nature of Radiative Turbulent Mixing Layers
• How cold gas continuously entrains mass and momentum from a hot wind
• Clustered Supernovae Drive Powerful Galactic Winds After Super-Bubble Breakout
• Cosmological Shocks in Adaptive Mesh Refinement Simulations and the Acceleration of Cosmic Rays
• Characterizing mass, momentum, energy and metal outflow rates of multi-phase galactic winds in the FIRE-2 cosmological simulations
• Non-Equilibirum ionisation and cooling of metal-enriched gas in the presence of a photo-ionisation background
• Efficiency of gas cooling and accretion at the disc-corona interface
• Thermal Instability with Anisotropic Thermal Conduction and Adiabatic Cosmic Rays: Implications for Cold Filaments in Galaxy Clusters
• Star Formation in Ram Pressure Stripped Tails
• Interpreting ALMA Observations of the ISM During the Epoch of Reionisation
• Zooming in on accretion - II. Cold Circumgalactic Gas Simulated with a super-Lagrangian Refinement Scheme
• Galaxies that Shine: radiation-hydrodynamical simulations of disk galaxies
• Physical Conditions in the Low-Ionization Component of Starburst Outflows: The Shape of Near-Ultraviolet and Optical Absorption-Line Troughs in Keck Spectra of ULIRGs
• The Launching of Cold Clouds by Galaxy Outflows II: The Role of Thermal Conduction
• MusE GAs FLOw and Wind (MEGAFLOW) III: galactic wind properties using background quasars
• A Quantification of the Butterfly Effect in Cosmological Simulations and Implications for Galaxy Scaling Relations
• Reionization simulations powered by GPUs I: the structure of the Ultraviolet radiation field
• The Field Condition: A New Constraint of Spatial Resolution in Simulations of the nonlinear Development of Thermal Instability
• Supernova-driven winds in simulated dwarf galaxies
• Galactic Winds in Low-Mass Galaxies
• Low-ionization Line Emission from Starburst Galaxies: A New Probe of Galactic-Scale Outflows
• Supernova feedback in a local vertically stratified medium: interstellar turbulence and galactic winds
• Survival and mass growth of cold gas in a turbulent, multiphase medium
• Computational Eulerian Hydrodynamics and Galilean Invariance
• A Comparison of Cosmological Codes: Properties of Thermal Gas and Shock Waves in Large Scale Structures
• A Chandra X-ray survey of nearby dwarf starburst galaxies: II. Starburst properties and outflows
• Efficient early stellar feedback can suppress galactic outflows by reducing supernova clustering
• Instability of Supersonic Cold Streams Feeding Galaxies IV: Survival of Radiatively Cooling Streams
• Chaos and Variance in Galaxy Formation
• Radiative Mixing Layers: Insights from Turbulent Combustion
• Growth and structure of multiphase gas in the cloud-crushing problem with cooling
• The extent of chemically enriched gas around star-forming dwarf galaxies
• Scattered Emission from z~1 Galactic Outflows
• Thermal Phases of the Neutral Atomic Interstellar Medium -- from Solar Metallicity to Primordial Gas
• Shaken, not blown: the gentle baryonic feedback of nearby starburst dwarf galaxies
• RASCAS: RAdiation SCattering in Astrophysical Simulations
• Tangos: the agile numerical galaxy organization system
• LYRA I: Simulating the multi-phase ISM of a dwarf galaxy with variable energy supernovae from individual stars
• Chandra Observation of NGC4449. Analysis of the X-ray Emission from a Dwarf Starburst Galaxy
• Observational constraints on stellar feedback in dwarf galaxies
• A Framework for Multiphase Galactic Wind Launching using TIGRESS
• Impact of Lyman alpha pressure on metal-poor dwarf galaxies
• Resolving shocks and filaments in galaxy formation simulations: effects on gas properties and star formation in the circumgalactic medium
• The Journey Counts: The Importance of Including Orbits when Simulating Ram Pressure Stripping
• Photochemistry and Heating/Cooling of the Multiphase Interstellar Medium with UV Radiative Transfer for Magnetohydrodynamic Simulations
• Numerical overcooling in shocks
• Simple Yet Powerful: Hot Galactic Outflows Driven by Supernovae
• How runaway stars boost galactic outflows
• INFERNO: Galactic winds in dwarf galaxies with star-by-star simulations including runaway stars
• Chandra & XMM-Newton Observations of NGC5253. Analysis of the X-ray Emission from a Dwarf Starburst Galaxy
• RAMSES-RTZ: Non-Equilibrium Metal Chemistry and Cooling Coupled to On-The-Fly Radiation Hydrodynamics
• Figuring Out Gas & Galaxies In Enzo (FOGGIE). IV. The Stochasticity of Ram Pressure Stripping in Galactic Halos
• A novel approach to correcting $T_e$-based mass-metallicity relations
• The DUVET Survey: Direct $T_e$-based metallicity mapping of metal-enriched outflows and metal-poor inflows in Mrk 1486
• Arkenstone I: A Novel Method for Robustly Capturing High Specific Energy Outflows In Cosmological Simulations
• Galactic Outflows, Star Formation Histories, and Timescales in Starburst Dwarf Galaxies from STARBIRDS
• Regulation of Star Formation by a Hot Circumgalactic Medium
• Supernovae feedback propagation: the role of turbulence
• Figuring Out Gas & Galaxies In Enzo (FOGGIE) VI: The Circumgalactic Medium of $L^{\ast }$ Galaxies is Supported in an Emergent, Non-Hydrostatic Equilibrium
• EDGE: The sensitivity of ultra-faint dwarfs to a metallicity-dependent initial mass function
• A New Model For Including Galactic Winds in Simulations of Galaxy Formation I: Introducing the Physically Evolved Winds (PhEW) Model
• Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers
• Figuring Out Gas & Galaxies In Enzo (FOGGIE) V: The Virial Temperature Does Not Describe Gas in a Virialized Galaxy Halo
• Self-ionizing galactic winds
• Modeling multi-phase gases in cosmological simulations using compressible multi-fluid hydrodynamics
• Instability of Evaporation Fronts in the Interstellar Medium
• Characterizing the Circumgalactic Medium of the Lowest-Mass Galaxies: A Case Study of IC 1613
• Tentative Detection of the Circumgalactic Medium of the Isolated Low-Mass Dwarf Galaxy WLM
• Mechanical feedback from stellar winds with an application to galaxy formation at high redshift
• Absorption Line Search Through Three Local Group Dwarf Galaxy Halos
• Resolution Convergence in Cosmological Hydrodynamical Simulations Using Adaptive Mesh Refinement

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• EDGE: The emergence of dwarf galaxy scaling relations from cosmological radiation-hydrodynamics simulations
• Why are thermally- and cosmic ray-driven galactic winds fundamentally different?
• Cosmic Ray-Driven Galactic Winds with Resolved ISM and Ion-Neutral Damping
• Zooming in on the Circumgalactic Medium with GIBLE: Tracing the Origin and Evolution of Cold Clouds
• Quokka-based understanding of outflows (QED) -- II. X-ray metallicity gradients as a signature of galactic wind metal loading
• The ionization structure and chemical history in isolated H II regions of dwarf galaxies with IFU I. The Sagittarius Dwarf Irregular Galaxy
• Neural Infalling Cloud Equations (NICE): Increasing the Efficacy of Subgrid Models and Scientific Equation Discovery using Neural ODEs and Symbolic Regression
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