The detectability of young galaxies
TL;DRAbstract
Abstract Possibilities for detecting primaeval galaxies are reviewed. The best prospects for detection are giant elliptical galaxies, in a stage of rapid star formation about 1010 years ago. These primaeval galaxies would probably be quasi-stellar in angular size. They could have easily detectable magnitudes if the most luminous stage occurs at red shifts z ≤ 5, and if internal dust does not absorb most of the ultraviolet—visual light. Although it is not clear whether very young giant elliptical galaxies have yet been found, excess populations of blue galaxies in clusters (discovered by Butcher & Oemler) and in the field (discovered by Kron) are almost certainly in early stages of active star formation.
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Abstract Possibilities for detecting primaeval galaxies are reviewed. The best prospects for detection are giant elliptical galaxies, in a stage of rapid star formation about 1010 years ago. These primaeval galaxies would probably be quasi-stellar in angular size. They could have easily detectable magnitudes if the most luminous stage occurs at red shifts z ≤ 5, and if internal dust does not absorb most of the ultraviolet—visual light. Although it is not clear whether very young giant elliptical galaxies have yet been found, excess populations of blue galaxies in clusters (discovered by Butcher & Oemler) and in the field (discovered by Kron) are almost certainly in early stages of active star formation.
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