Rediscovering the origins of the stellar halo with chemical tagging

Abstract

The Galactic halo has a complex assembly history, which can be seen in its wealth of kinematic and chemical substructure. Globular clusters lose stars through tidal interactions with the Galaxy and cluster evaporation processes, meaning that they are inevitably a source of halo stars. These "migrants" from globular clusters can be recognized in the halo field by the characteristic light element abundance anticorrelations that are commonly observed only in globular cluster stars, and the number of halo stars that can be chemically tagged to globular clusters can be used to place limits on the formation pathways of those clusters.

5 pages, to appear in the proceedings of IAUS 334 "Rediscovering our Galaxy", eds C. Chiappini, I. Minchev, E. Starkenburg and M. Valentini

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Cited by in corpus (1)

• A high-resolution spectroscopic study of two new Na- and Al-rich field giants -- likely globular cluster escapees in the Galactic halo