APOGEE detection of N-rich stars in the tidal tails of Palomar 5

Siân G. Phillips, Ricardo P. Schiavon, J. Ted MacKereth, Carlos Allende Prieto, Borja Anguiano, Rachael L. Beaton, Roger E. Cohen, D. A. García-Hernández, Douglas Geisler, Danny Horta, Henrik Jönsson, Shobhit Kisku, Richard R. Lane, Steven R. Majewski, Andrew Mason, Dante Minniti, Mathias Schultheis, Dominic Taylor

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Recent results from chemical tagging studies using Apache Point Observatory Galactic Evolution Experiment data suggest a strong link between the chemical abundance patterns of stars found within globular clusters (GC), and chemically peculiar populations in the Galactic halo field. In this paper, we analyse the chemical compositions of stars within the cluster body and tidal streams of Palomar 5, a GC that is being tidally disrupted by interaction with the Galactic gravitational potential. We report the identification of nitrogen-rich (N-rich) stars both within and beyond the tidal radius of Palomar 5, with the latter being clearly aligned with the cluster tidal streams; this acts as confirmation that N-rich stars are lost to the Galactic halo from GCs, and provides support to the hypothesis that field N-rich stars identified by various groups have a GC origin.

Original languageEnglish
Pages (from-to)3727-3733
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume510
Issue number3
DOIs
Publication statusPublished - 1 Mar 2022

Keywords

  • Globular Clusters

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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