Metallicity and α-Element Abundance Gradients along the Sagittarius Stream as Seen by APOGEE
Metallicity and α-Element Abundance Gradients along the Sagittarius Stream as Seen by APOGEE
Using 3D positions and kinematics of stars relative to the Sagittarius (Sgr) orbital plane and angular momentum, we identify 166 Sgr stream members observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) that also have Gaia DR2 astrometry. This sample of 63/103 stars in the Sgr trailing/leading arm are …