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Galactic Winds in Low-Mass Galaxies

Published online by Cambridge University Press:  30 October 2019

Kristen B. W. McQuinn ,
Liese van Zee  and
Evan D. Skillman
Kristen B. W. McQuinn
Affiliation:
University of Texas, Department of Astronomy, 2550 Speedway Stop C-1400 Austin, Texas, 78755USA email: [email protected]
Liese van Zee
Affiliation:
Indiana University, Department of Astronomy, Swain West 410, 727 East Third Street, Bloomington, IN 47405USA
Evan D. Skillman
Affiliation:
University of Minnesota, School of Physics and Astronomy, 116 Church St SE, Minneapolis, MN 55455USA
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Abstract

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Mass-loss via stellar-feedback driven outflows is predicted to play a critical role in the baryon cycle of low-mass galaxies. However, observational constraints on warm winds are limited as outflows are transient, intrinsically low-surface brightness events and, thus, difficult to detect. Here, we search for outflows in a sample of eleven nearby starburst dwarf galaxies which are strong candidates for outflows. Despite deep H? imaging on galaxies, only a fraction of the sample show evidence of winds. The spatial extent of all detected ionized gas is limited and would still be considered part of the ISM by simulations. These new observations indicate that the physical extent of warm phase outflows is modest and most of the mass will be recycled to the galaxy. The sample is part of the panchromatic STARBurst IRegular Dwarf Survey (STARBIRDS) designed to characterize the starburst phenomenon and its impact on the evolution of low-mass galaxies.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: halos
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 301 - 304
Copyright
© International Astronomical Union 2019 

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