Momentum feedback from marginally-resolved HII regions in isolated disc galaxies

Abstract

We present a novel, physically-motivated sub-grid model for HII region feedback within the moving mesh code Arepo, accounting for both the radiation pressure-driven and thermal expansion of the ionised gas surrounding young stellar clusters. We apply this framework to isolated disc galaxy simulations with mass resolutions between $10^3{\mathrm{M}}_{\odot }$ and $10^5{\mathrm{M}}_{\odot }$ per gas cell. Each simulation accounts for the self-gravity of the gas, the momentum and thermal energy from supernovae, the injection of mass by stellar winds, and the non-equilibrium chemistry of hydrogen, carbon and oxygen. We reduce the resolution-dependence of our model by grouping those HII regions with overlapping ionisation front radii. The Strömgren radii of the grouped HII regions are at best marginally-resolved, so that the injection of purely-thermal energy within these radii has no effect on the interstellar medium. By contrast, the injection of momentum increases the fraction of cold and molecular gas by more than 50 per cent at mass resolutions of $10^3{\mathrm{M}}_{\odot }$, and decreases its turbulent velocity dispersion by $\sim 10{\mathrm{kms}}^{-1}$. The mass-loading of galactic outflows is decreased by an order of magnitude. The characteristic lifetime of the least-massive molecular clouds ($M/{\mathrm{M}}_{\odot }<5.6\times 10^4$) is reduced from $\sim 18$ Myr to $<10$ Myr, indicating that HII region feedback is effective in destroying these clouds. Conversely, the lifetimes of intermediate-mass clouds ($5.6\times 10^4<M/{\mathrm{M}}_{\odot }<5\times 10^5$) are elongated by $\sim 7$ Myr, likely due to a reduction in supernova clustering. The derived cloud lifetimes span the range from $10$-$40$ Myr, in agreement with observations. All results are independent of whether the momentum is injected from a 'spherical' or a 'blister-type HII region.

Accepted for publication in MNRAS. Comments welcome!

References in corpus (39)

• Slow Star Formation in Dense Gas: Evidence and Implications
• Physical properties of molecular clouds for the entire Milky Way disk
• Escape fraction of ionizing photons during reionization: effects due to supernova feedback and runaway OB stars
• What is Driving the HI Velocity Dispersion?
• Simulating the formation of molecular clouds. I. Slow formation by gravitational collapse from static initial conditions
• The present-day star formation rate of the Milky-Way determined from Spitzer detected young stellar objects
• The lifecycle of molecular clouds in nearby star-forming disc galaxies
• Simulating the formation of molecular clouds. II. Rapid formation from turbulent initial conditions
• The Dynamics of Radiation Pressure-Dominated HII Regions
• Fast and inefficient star formation due to short-lived molecular clouds and rapid feedback
• Feedback and metal enrichment in cosmological SPH simulations - II. A multiphase model with supernova energy feedback
• On the interplay between star formation and feedback in galaxy formation simulations
• A Superbubble Feedback Model for Galaxy Simulations
• Studying the YMC population of M83: how long clusters remain embedded, their interaction with the ISM and implications for GC formation theories
• SLUG - Stochastically Lighting Up Galaxies. II: Quantifying the Effects of Stochasticity on Star Formation Rate Indicators
• Star Formation Efficiency and Dispersal of Giant Molecular Clouds with UV Radiation Feedback: Dependence on Gravitational Boundedness and Magnetic Fields
• ALMA Observations of the Antennae Galaxies: I. A New Window on a Prototypical Merger
• Efficient early stellar feedback can suppress galactic outflows by reducing supernova clustering
• Numerical Simulations of Turbulent, Molecular Clouds Regulated by Radiation Feedback Forces I: Star Formation Rate and Efficiency
• The Spatial Relation between Young Star Clusters and Molecular Clouds in M 51 with LEGUS
• Short GMC lifetimes: an observational estimate with the PdBI Arcsecond Whirlpool Survey (PAWS)
• The integrated properties of the molecular clouds from the JCMT CO(3-2) High Resolution Survey
• H$\alpha$ Morphologies of Star Clusters: A LEGUS study of HII region evolution timescales and stochasticity in low mass clusters
• Evolution of Stellar Feedback in HII Regions
• A Framework for Multiphase Galactic Wind Launching using TIGRESS
• Modeling UV Radiation Feedback from Massive Stars: I. Implementation of Adaptive Ray Tracing Method and Tests
• Star cluster formation and cloud dispersal by radiative feedback: dependence on metallicity and compactness
• The role of galactic dynamics in shaping the physical properties of giant molecular clouds in Milky Way-like galaxies
• A fundamental test for stellar feedback recipes in galaxy simulations
• Modeling UV Radiation Feedback from Massive Stars: III. Escape of Radiation from Star-forming Giant Molecular Clouds
• Evolutionary Description of Giant Molecular Cloud Mass Functions on Galactic Disks
• The sensitivity of stellar feedback to IMF averaging versus IMF sampling in galaxy formation simulations
• The effect of photoionising feedback on the shaping of hierarchically-forming stellar clusters
• Looking for obscured young star clusters in NCG 1313
• Numerical Simulations of Turbulent Molecular Clouds Regulated by Radiation Feedback Forces II: Radiation-Gas Interactions and Outflows
• A scaling relation for the molecular cloud lifetime in Milky Way-like galaxies
• Momentum Injection by Clustered Supernovae: Testing Subgrid Feedback Prescriptions
• Pre-supernova feedback mechanisms drive the destruction of molecular clouds in nearby star-forming disc galaxies
• Giant Molecular Clouds in Local Group Galaxies

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