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• W4280653691 endingPage "L6" @default.
• W4280653691 startingPage "L6" @default.
• W4280653691 abstract "One of the fundamental factors regulating the evolution of galaxies is stellar feedback. However, we still do not have strong observational constraints on the relative importance of the different feedback mechanisms (e.g. radiation, ionised gas pressure, stellar winds) in driving HII region evolution and molecular cloud disruption. In this letter, we constrain the relative importance of the various feedback mechanisms from young massive star populations by resolving HII regions across the disk of the nearby star-forming galaxy NGC 1672. We combine measurements of ionised gas nebular lines obtained by PHANGS-MUSE, with high-resolution imaging from the HST in both the narrow-band H{alpha} and broad-band filters. We identify a sample of 40 isolated, compact HII regions in the HST H{alpha} image, for which we measure the sizes that were previously unresolved in seeing-limited ground-based observations. Additionally, we identify the ionisation source(s) for each HII region from catalogues produced as part of the PHANGS-HST survey. We find that the HII regions investigated are mildly dominated by thermal or wind pressure, yet their elevation above the radiation pressure is within the expected uncertainty range. We see that radiation pressure provides a substantially higher contribution to the total pressure than previously found in the literature over similar size scales. In general, we find higher pressures within more compact HII regions, which is driven by the inherent size scaling relations of each pressure term, albeit with significant scatter introduced by the variation in the stellar population properties (e.g. luminosity, mass, age, metallicity). For nearby galaxies, here we provide a promising approach that could yield the statistics required to map out how the importance of different stellar feedback mechanisms evolve over the lifetime of an HII region." @default.
• W4280653691 created "2022-05-22" @default.
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• W4280653691 date "2022-06-01" @default.
• W4280653691 modified "2023-10-16" @default.
• W4280653691 title "Linking stellar populations to H II regions across nearby galaxies" @default.
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• W4280653691 doi "https://doi.org/10.1051/0004-6361/202243766" @default.
• W4280653691 hasPublicationYear "2022" @default.

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