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Determining the Timescale over Which Stellar Feedback Drives Turbulence in the Interstellar Medium: A Study of Four Nearby Dwarf Irregular Galaxies
Stellar feedback is fundamental to the modeling of galaxy evolution, as it drives turbulence and outflows in galaxies. Understanding …
Laura Hunter Congreve, Liese van Zee, Kristen B. W. McQuinn, Ray Garner, Andrew E. Dolphin
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A Deep Census of Outlying Star Formation in the M101 Group
We present deep, narrowband imaging of the spiral galaxy M101 and its group environment to search for star-forming dwarf galaxies and outlying HII regions. We find no large population of outlying HII regions or undiscovered star-forming dwarfs in the M101 Group, as most sources (93%) are consistent with being M101 outer-disk HII regions. The lack of any hidden population of low-luminosity star-forming dwarfs around M101 suggests a shallow faint-end slope (as flat at $\alpha ~ -1.0$) for the star-forming luminosity function in the M101 Group.
Ray Garner, J. Christopher Mihos, Paul Harding, Aaron E. Watkins
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A Deep Census of Outlying Star Formation in the M101 Group