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Nearby Dwarf Galaxies Show Surprising Lack Of Oxygen, Says Paper

Image from NASA’s Hubble Space Telescope of NGC 4449, one of the dwarf galaxies in the Galaxies Losing Oxygen via Winds (GLOW) study. Researchers found that dwarf galaxies can hold onto only a small fraction of the oxygen made by their stars. Credit: NASA, ESA, Hubble Heritage–ESA/Hubble Collaboration, Alessandra Aloisi (STScI, ESA)

A new study of more than three dozen dwarf galaxies has surprised researchers with just how little oxygen they have been able to retain over cosmic time. The results reveal that we still have major gaps in our understanding of galaxy evolution.



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