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

Abstract

Recent results from chemical tagging studies using APOGEE data suggest a strong link between the chemical abundance patterns of stars found within globular clusters, 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 globular cluster 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 globular clusters, and provides support to the hypothesis that field N-rich stars identified by various groups have a globular cluster origin.

arXiv comment8 pages, 8 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society

References in corpus (50)

• The Gaia mission
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• galpy: A Python Library for Galactic Dynamics
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Multiple Stellar Populations in Globular Clusters
• The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment
• Na-O Anticorrelation and HB. VIII. Proton-capture elements and metallicities in 17 globular clusters from UVES spectra
• A catalogue of masses, structural parameters and velocity dispersion profiles of 112 Milky Way globular clusters
• Gaia EDR3 view on Galactic globular clusters
• APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
• Origin of the system of globular clusters in the Milky Way
• The Data Reduction Pipeline for the Apache Point Observatory Galactic Evolution Experiment
• A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey
• Abundances, Stellar Parameters, and Spectra From the SDSS-III/APOGEE Survey
• The extended tails of Palomar 5: A ten degree arc of globular cluster tidal debris
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. V. Constraints on Formation Scenarios
• Target Selection for the SDSS-IV APOGEE-2 Survey
• APOGEE Data Releases 13 and 14: Data and Analysis
• New ATLAS9 And MARCS Model Atmosphere Grids for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The nucleus of the Sagittarius dSph galaxy and M54: a window on the process of galaxy nucleation
• Chemical tagging with APOGEE: Discovery of a large population of N-rich stars in the inner Galaxy
• Modeling the disruption of the globular cluster Pal5 by Galactic tides
• Building the Galactic halo from globular clusters: evidence from chemically unusual red giants
• The Gaia-ESO Survey. Mg-Al anti-correlation in iDR4 globular clusters
• A sharper view of Pal 5's tails: Discovery of stream perturbations with a novel non-parametric technique
• Age as a Major Factor in the Onset of Multiple Populations in Stellar Clusters
• Kinematic study of the disrupting globular cluster Palomar 5 using VLT spectra
• Oxygen abundances in low- and high-alpha field halo stars and the discovery of two field stars born in globular clusters
• The Chemical Compositions of Accreted and {\it in situ} Galactic Globular Clusters According to SDSS/APOGEE
• Chemical tagging in the SDSS-III/APOGEE survey: new identifications of halo stars with globular cluster origins
• Atypical Mg-poor Milky Way field stars with globular cluster second-generation like chemical patterns
• The Gaia-ESO Survey: A globular cluster escapee in the Galactic halo
• The Relationship Between Globular Cluster Mass, Metallicity, and Light Element Abundance Variations
• Palomar 5 and its Tidal Tails: A Search for New Members in the Tidal Stream
• Chemodynamics of newly identified giants with globular cluster like abundance patterns in the bulge, disk, and halo of the Milky Way
• The contribution of N-rich stars to the Galactic stellar halo using APOGEE red giants
• Evidence of AGB pollution in Galactic globular clusters from the Mg-Al anticorrelations observed by the APOGEE survey
• Feeling the pull, a study of natural Galactic accelerometers. II: kinematics and mass of the delicate stellar stream of the Palomar 5 globular cluster
• An extended Pal 5 stream in Gaia DR2
• Search for Extra-Tidal RR Lyrae Stars in Milky Way Globular Clusters From Gaia DR2
• The [α/Fe]-[Fe/H] relation in the E-MOSAICS simulations: its connection to the birth place of globular clusters and the fraction of globular cluster field stars in the bulge
• APOGEE discovery of a chemically atypical star disrupted from NGC 6723 and captured by the Milky Way bulge
• APOGEE spectroscopic evidence for chemical anomalies in dwarf galaxies: The case of M~54 and Sagittarius
• Photometric characterization of multiple populations in star clusters: The impact of the first dredge-up
• An enquiry on the origins of N-rich stars in the inner Galaxy basedon APOGEE chemical compositions
• New Determination of Fundamental Properties of Palomar 5 Using Deep DESI Imaging Data

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• Nitrogen enrichment and clustered star formation at the dawn of the Galaxy
• Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO) I. An updated census of APOGEE N-rich giants across the Milky Way
• The e-TidalGCs Project: Modeling the extra-tidal features generated by Galactic globular clusters
• Multiple stellar population mass loss in massive Galactic globular clusters
• The ones that got away: chemical tagging of globular cluster-origin stars with Gaia BP/RP spectra
• The dawn is quiet here: Rise in [$\alpha$/Fe] is a signature of massive gas accretion that fueled proto-Milky Way
• Chemical tagging with APOGEE, MUSE, and HST: constraints on the formation of $\omega$ Centauri
• Mock Observations of Multiple Stellar Populations in Tidal Streams of Palomar 5 for the Chinese Space Station Survey Telescope