The ALPINE-ALMA [CII] survey: double stellar population and AGN activity in a galaxy at $z\sim 5.5$

L. Barchiesi, M. Dessauges-Zavadsky, C. Vignali +16

GDS J033218.92-275302.7 (here GS-14) is a $z\sim 5.5$ galaxy detected in [CII] as part of the ALPINE survey with unusual UV spectral features that have been interpreted as signature…