Determining the Timescale over Which Stellar Feedback Drives Turbulence in the ISM: A Study of four Nearby Dwarf Irregular Galaxies

Abstract

Stellar feedback is fundamental to the modeling of galaxy evolution as it drives turbulence and outflows in galaxies. Understanding the timescales involved are critical for constraining the impact of stellar feedback on the interstellar medium (ISM). We analyzed the resolved star formation histories along with the spatial distribution and kinematics of the atomic and ionized gas of four nearby star-forming dwarf galaxies (NGC 4068, NGC 4163, NGC 6789, UGC 9128) to determine the timescales over which stellar feedback drives turbulence. The four galaxies are within 5 Mpc and have a range of properties including current star formation rates of 0.0005 to 0.01 M${}_{\odot }$ yr${}^{-1}$, log(M${}_{\ast }$/M${}_{\odot }$) between 7.2 and 8.2, and log(M${}_{HI}$/M${}_{\odot }$) between 7.2 and 8.3. Their Color-Magnitude Diagram (CMD) derived star formation histories over the past 500 Myrs were compared to their atomic and ionized gas velocity dispersion and HI energy surface densities as indicators of turbulence. The Spearman's rank correlation coefficient was used to identify any correlations between their current turbulence and their past star formation activity on local scales ($\sim$400 pc). The strongest correlation found was between the HI turbulence measures and the star formation rate 100-200 Myrs ago. This suggests a coupling between the star formation activity and atomic gas on this timescale. No strong correlation between the ionized gas velocity dispersion and the star formation activity between 5-500 Myrs ago was found. The sample and analysis are the foundation of a larger program aimed at understanding the timescales over which stellar feedback drives turbulence.

arXiv comment21 pages, 19 figures. Accepted for publication in AJ

References in corpus (63)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• On the variation of the Initial Mass Function
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• Star Formation in the Milky Way and Nearby Galaxies
• Control of star formation by supersonic turbulence
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Galaxies on FIRE (Feedback In Realistic Environments): Stellar Feedback Explains Cosmologically Inefficient Star Formation
• Interstellar Turbulence I: Observations and Processes
• SparsePak: A Formatted Fiber Field Unit for The WIYN Telescope Bench Spectrograph. I. Design, Construction, and Calibration
• FIRE-2 Simulations: Physics versus Numerics in Galaxy Formation
• WFPC2 Stellar Photometry with HSTphot
• A Universal Stellar Initial Mass Function? A Critical Look at Variations
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Cosmicflows-2: The Data
• Numerical Methods of Star Formation History Measurement and Applications to Seven Dwarf Spheroidals
• The ACS Nearby Galaxy Survey Treasury
• The Star Formation Histories of Local Group Dwarf Galaxies I. Hubble Space Telescope / Wide Field Planetary Camera 2 Observations
• Little Things
• Direct Oxygen Abundances for Low Luminosity LVL Galaxies
• The ACS Nearby Galaxy Survey Treasury VIII. The Global Star Formation Histories of 60 Dwarf Galaxies in the Local Volume
• Maximally Star-Forming Galactic Disks I. Starburst Regulation Via Feedback-Driven Turbulence
• What is Driving the HI Velocity Dispersion?
• The Origin and Evolution of the Mass-Metallicity Relationship for Galaxies: Results from Cosmological N-Body Simulations
• The State of the Gas and the Relation Between Gas and Star Formation at Low Metallicity: the Small Magellanic Cloud
• The Nature of Starbursts: I. The Star Formation Histories of Eighteen Nearby Starburst Dwarf Galaxies
• A Method for Determining the Star Formation History of a Mixed Stellar Population
• Observations and Implications of the Star Formation History of the LMC
• Dependence of Interstellar Turbulent Pressure on Supernova Rate
• Regulation of Star Formation Rates in Multiphase Galactic Disks: Numerical Tests of the Thermal/Dynamical Equilibrium Model
• Superbubbles in the Multiphase ISM and the Loading of Galactic Winds
• The Nature of Starbursts : II. The Duration of Starbursts in Dwarf Galaxies
• The Turbulent Interstellar Medium: Generalizing to a Scale-dependent Phase Continuum
• Enhanced Momentum Feedback from Clustered Supernovae
• VLA-ANGST: A high-resolution HI Survey of Nearby Dwarf Galaxies
• Galactic Winds in Low-Mass Galaxies
• Kinematic Constraints on Evolutionary Scenarios for Blue Compact Dwarf Galaxies : I. Neutral Gas Dynamics
• On the Estimation of Systematic Uncertainties of Star Formation Histories
• Evolution of supernovae-driven superbubbles with conduction and cooling
• IAC-pop: Finding the Star Formation History of Resolved Galaxies
• Star Formation and the ISM in Four Dwarf Irregular Galaxies
• On the Estimation of Random Uncertainties of Star Formation Histories
• The Shapes of the HI Velocity Profiles of the THINGS Galaxies
• What controls the ionized gas turbulent motions in dwarf galaxies?
• Evidence for supernova feedback sustaining gas turbulence in nearby star-forming galaxies
• Tracing Outflowing Metals in Simulations of Dwarf and Spiral Galaxies
• Drivers of HI Turbulence in Dwarf Galaxies
• Evolution of stellar structure in the Small Magellanic Cloud
• Swirls of FIRE: Spatially Resolved Gas Velocity Dispersions and Star Formation Rates in FIRE-2 Disk Environments
• Neutral Gas Distribution and Kinematics of the Nearly Face-on Spiral Galaxy NGC 1232
• The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially-resolved local star-forming galaxies
• Global HI Kinematics in Dwarf Galaxies
• Tracing Cold HI Gas in Nearby, Low-Mass Galaxies
• What drives the evolution of gas kinematics in star-forming galaxies?
• The volumetric star formation law for nearby galaxies -- Extension to dwarf galaxies and low-density regions
• The evolution of stellar structures in dwarf galaxies
• What drives the velocity dispersion of ionized gas in star-forming galaxies?
• A semi-analytic model of the turbulent multi-phase interstellar medium
• A Search for correlations between turbulence and star formation in LITTLE THINGS dwarf irregular galaxies
• The Panchromatic STARBurst IRregular Dwarf Survey (STARBIRDS) Data
• Timescales on which Star Formation Affects the Neutral ISM

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