- Este event já passou.
The APOGEE-2S view of chemically anomalous field giant stars: Stellar debris of defunct extra-galactic/Galactic globular clusters – José Fernandez Trincado (Universidad de Concepcion, Chile)
28 de março de 2018: 12:30 - 14:00
APOGEE-2 contains more than hundred thousands new giant stars. This enabled us to collected an unprecedented and homogeneous sample of giant stars with light/heavy-element abundance variations similar to observed in “second-generation” globular cluster stars. If they are really former members of dissolved globular clusters, stars in these groups should show some of the basic SG-like chemical patterns known for stars currently belonging to the Milky Way globular clusters, such as depletion in C and O together with N and Al enrichment. We will present the results of an updated census of trustly SG-like stars from a near-infrared manual analysis using the Brussels Automatic Stellar Parameter (BACCHUS) code to provide the abundances of C, N, O, Mg, Si, Al, Fe, Ce and Nd for every line of possible cluster member stars, which they migrate to the disk, halo and bulge as unbound stars, and become part of the general stellar population of the Milky Way.