0.1<z<0.8 galaxies gas-phase metallicity grad.

Galaxies at low-redshift typically possess negative gas-phase metallicity gradients (centres more metal-rich than their outskirts). Whereas, it is not uncommon to observe...低红移（low-redshift）星系通常呈现负的气相金属丰度梯度（gas-phase metallicity gradients），即星系中心区域相较于其外围更富金属。而观测到此类现象的反例并不鲜见……