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The Relative Importance of Thermal Gas, Radiation, and Magnetic Pressures around Star-forming Regions in Normal Galaxies and Dusty Starbursts

  • Authors: Eric J. Murphy

Eric J. Murphy 2022 The Astrophysical Journal 938 .

  • Provider: AAS Journals

Caption: Figure 9.

Logarithmic ratios of the total internal-to-dynamical equilibrium pressures plotted as a function of aperture diameter in physical units. The dynamical equilibrium pressures are estimated via a linear interpolation using the measured SFR surface densities and the correlation between ΣSFR and P DE found by Sun et al. (2020). Subsets of the sample are identified using different plotting symbols. The dashed line indicates a ratio of unity, while the solid line illustrates the median ratio. Neglecting any additional pressure term associated with turbulent motions of the gas, only ≈5% of the star-forming regions appear to be overpressurized relative to the dynamical equilibrium pressure, each of which are measured on ≲1 kpc scales.

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