Pressure estimates around SFRs in nearby galaxies

Given the range of galaxy distances, pressure estimates are made on spatial scales spanning ~0.1-3kpc. The ratio of thermal gas-to-radiation pressures does not appear to significantly depend on star formation rate surface density ({Sigma}_SFR_), but exhibits a steady decrease with increasing physical size of the aperture over which the quantities are measured.

The ratio of magnetic-to-radiation pressures appears to be relatively flat as a function of {Sigma}_SFR_ and similar in value for both nuclear and extranuclear regions, but, unlike the ratio of thermal gas-to-radiation pressures, exhibits a steady increase with increasing aperture size. Furthermore, it seems that the magnetic pressure is typically weaker than the radiation pressure on subkiloparsec scales, and only starts to play a significant role on few-kiloparsec scales.