ultravioletdropout

ultravioletdropout
ultraviolet dropout n.
1. The disappearance of the image of an extremely distant galaxy when viewed through an ultraviolet filter, caused by the absorption of ultraviolet rays by intergalactic hydrogen gas.
2. A technique that identifies extremely distant galaxies that are not visible through ultraviolet filters by the comparative analysis of images viewed through red, green, and ultraviolet filters.

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Universalium. 2010.

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