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The production and escape of ionizing photons from galaxies over cosmic time (Astro2020 Science White Paper)

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arxiv 1905.05566 v1 pith:MQVQTTTV submitted 2019-05-14 astro-ph.GA

Jane R. Rigby , Danielle Berg , Rongmon Bordoloi , John Chisholm , Michael Florian , Matthew Hayes , Michael Gladders , Bethan James
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Sangeeta Malhotra Sally Oey John O'Meara T. Emil Rivera-Thorsen Keren Sharon
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classification astro-ph.GA
keywords ionizingescapephotonscosmicgalaxiesgalaxyphotonpopulations
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The ionizing photons produced by massive stars are key actors in galaxy evolution. Ionizing photon production and escape is poorly understood. Improved space-based, spatially-resolved, multiplexed spectroscopic capabilities covering observed wavelengths of 1000 to 3000 Angstrom, in concert with spectroscopy from the ELTs and JWST, would lead to definitive answers as to how ionizing photons are produced and leaked, what populations of galaxies are responsible for ionizing photon leakage, what determines whether escape is possible, and how ionizing galaxy populations evolve over cosmic time.

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