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Low gas-phase metallicities of ultraluminous infrared galaxies are a result of dust obscuration

Chartab, Nima; Fadda, Dario; Herrera-Camus, Rodrigo +9 more

Optical spectroscopic measurements show that gas in dusty, starbursting galaxies known as ultraluminous infrared galaxies (ULIRGs) in the local Universe has a significantly lower metal content than that of gas in star-forming galaxies with similar masses. This low metal content has resulted in the claim that ULIRGs are primarily fuelled by metal-p…