A Search for correlations between turbulence and star formation in THINGS galaxies
arXiv:2202.08109 · doi:10.3847/1538-4357/ac559c
Abstract
The spatial range for feedback from star formation varies from molecular cloud disruption on parsec scales to supershells and disk blowout on kiloparsec scales. The relative amounts of energy and momentum given to these scales is important for understanding the termination of star formation in any one region and the origin of interstellar turbulence and disk stability in galaxies as a whole. Here we measure for eleven THINGS galaxies the excess kinetic energy, velocity dispersion and surface density of HI gas associated with regions of excess star formation, where the excess is determined from the difference between the observed local value and the azimuthal average. We find small decreases in the excess kinetic energy and velocity dispersion in regions of excess star formation rate density, suggesting that most of the feedback energy does not go into local HI motion. Most likely it disrupts molecular clouds and dissipates rapidly at high gas density. Some could also be distributed over larger regions, filling in spaces between the peaks of star formation and contributing to other energy sources from self-gravity and spiral arm shocks.
accepted by ApJ, 17 pages, 14 figures
References in corpus (17)
- High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
- What is Driving the HI Velocity Dispersion?
- Turbulent Structure of a Stratified Supernova-Driven Interstellar Medium
- The lifecycle of molecular clouds in nearby star-forming disc galaxies
- Starbursts triggered by inter-galactic tides and interstellar compressive turbulence
- Dependence of Interstellar Turbulent Pressure on Supernova Rate
- Dynamical Centers and Non-Circular Motions in THINGS Galaxies: Implications for Dark Matter Halos
- Large scale galactic turbulence: can self-gravity drive the observed HI velocity dispersions?
- Kinematics of Spiral Arm Streaming in M51
- Simulations of magnetized multiphase galactic disk regulated by supernovae explosions
- The impact of stellar feedback on the density and velocity structure of the interstellar medium
- The spatially resolved Kennicutt-Schmidt relation in the HI dominated regions of spiral and dwarf irregular galaxies
- Evidence for supernova feedback sustaining gas turbulence in nearby star-forming galaxies
- Mapping Spatial Variations of HI Turbulent Properties in the Small and Large Magellanic Cloud
- Size distribution of superbubbles
- The Role of Feedback in Shaping the Structure of the Interstellar Medium
- Determining the Timescale over Which Stellar Feedback Drives Turbulence in the ISM: A Study of four Nearby Dwarf Irregular Galaxies