Damped Lyman-alpha system

ID: damped-lyman-alpha-system

A Damped Lyman-alpha system (DLA) is a type of astronomical object observed in the spectra of distant quasars and galaxies. It is characterized by a strong absorption feature in the Lyman-alpha transition of hydrogen (at a wavelength of 121.6 nm) due to neutral hydrogen gas in the intervening medium.

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