CAPOS: The bulge Cluster APOgee Survey III. Spectroscopic Tomography of Tonantzintla 2

Abstract

(ABRIDGED) We have performed the first detailed spectral analysis of red giant members of the relatively high-metallicity globular cluster (GC) Tononzintla~2 (Ton~2) using high-resolution near-infrared spectra collected with the Apache Point Observatory Galactic Evolution Experiment II survey (APOGEE-2), obtained as part of the bulge Cluster APOgee Survey. We investigate chemical abundances for a variety of species including the light-, odd-Z, $\alpha$-, Fe-peak, and neutron-capture elements from high S/N spectra of seven giant members. The derived mean cluster metallicity is [Fe/H]$=-0.70\pm 0.05$, with no evidence for an intrinsic metallicity spread. Ton~2 exhibits a typical $\alpha$-enrichment that follows the trend for high-metallicity Galactic GCs, similar to that seen in 47~Tucanae and NGC~6380. We find a significant nitrogen spread ($>0.87$ dex), and a large fraction of nitrogen-enriched stars that populate the cluster. Given the relatively high-metallicity of Ton~2, these nitrogen-enriched stars are well above the typical Galactic levels, indicating the prevalence of the multiple-population phenomenon in this cluster which also contains several stars with typical low, first-generation N abundances. We also identify the presence of [Ce/Fe] abundance spread in Ton~2, which is correlated with the nitrogen enhancement, indicating that the \textit{s}-process enrichment in this cluster has been produced likely by relatively low-mass Asymptotic Giant Branch stars. Furthermore, we find a mean radial velocity of the cluster, $-178.6\pm 0.86$ km s${}^{-1}$ with a small velocity dispersion, 2.99$\pm$0.61 km s${}^{-1}$, which is typical of a GC. We also find a prograde bulge-like orbit for Ton~2 that appears to be radial and highly eccentric.

arXiv commentAccepted for publication in A&A; 12 pages, 9 figures, 2 tables. arXiv admin note: text overlap with arXiv:2106.00027

References in corpus (87)

• Gaia Data Release 2. Summary of the contents and survey properties
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• 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
• VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
• Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters
• Na-O Anticorrelation and HB. VII. The chemical composition of first and second-generation stars in 15 globular clusters from GIRAFFE spectra
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Multiple Stellar Populations in Globular Clusters
• The Dawes Review 2: Nucleosynthesis and stellar yields of low and intermediate-mass single stars
• 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
• The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
• Gaia EDR3 view on Galactic globular clusters
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
• Mean proper motions, space orbits and velocity dispersion profiles of Galactic globular clusters derived from Gaia DR2 data
• Origin of the system of globular clusters in the Milky Way
• The Data Reduction Pipeline for the Apache Point Observatory Galactic Evolution Experiment
• Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data
• 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
• Chemical tagging with APOGEE: Discovery of a large population of N-rich stars in the inner Galaxy
• The two metallicity groups of the globular cluster M22: a chemical perspective
• An abundance analysis of bright giants in the globular cluster NGC 1851
• The SDSS-III APOGEE Spectral Line List for H-band Spectroscopy
• Reverse engineering the Milky Way
• Iron and s-elements abundance variations in NGC5286: comparison with anomalous globular clusters and Milky Way satellites
• Homogeneous Analysis of Globular Clusters from the APOGEE Survey with the BACCHUS Code. II. The Southern Clusters and Overview
• The APOGEE Data Release 16 Spectral Line List
• VIRAC: The VVV Infrared Astrometric Catalogue
• Exploring Anticorrelations and Light Element Variations in Northern Globular Clusters Observed by the APOGEE Survey
• The pattern speed of the Milky Way bar from transverse velocities
• The Gaia-ESO Survey. Mg-Al anti-correlation in iDR4 globular clusters
• New H-band Stellar Spectral Libraries for the SDSS-III/APOGEE survey
• Kinematics of the Galactic Globular Cluster System: New Radial Velocities for Clusters in the Direction of the Inner Galaxy
• A large C+N+O abundance spread in giant stars of the globular cluster NGC 1851
• Interstellar Extinction Curve Variations Toward the Inner Milky Way: A Challenge to Observational Cosmology
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XIX. A Chemical Tagging of the Multiple Stellar Populations Over the Chromosome Maps
• C and N Abundances in Stars At the Base of the Red Giant Branch in M5
• The C+N+O abundance of Omega Centauri giant stars: implications on the chemical enrichment scenario and the relative ages of different stellar populations
• Final Targeting Strategy for the SDSS-IV APOGEE-2S Survey
• Detailed abundances of Red Giants in the Globular Cluster NGC~1851: C+N+O and the Origin of Multiple Populations
• APOGEE Chemical Abundances of Globular Cluster Giants in the Inner Galaxy
• A homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code. I. The Northern clusters
• The C+N+O abundances and the splitting of the subgiant branch in the Globular Cluster NGC 1851
• The metallicity spread and the age-metallicity relation of Omega Centauri
• Atypical Mg-poor Milky Way field stars with globular cluster second-generation like chemical patterns
• Calcium and light-elements abundance variations from high resolution spectroscopy in globular clusters
• Young Radio Pulsars in Galactic Globular Clusters
• Milky Way demographics with the VVV survey. I. The 84-million star colour-magnitude diagram of the Galactic bulge
• Discovery of a Metal-Poor Field Giant with a Globular Cluster Second-Generation Abundance Pattern
• The Relationship Between Globular Cluster Mass, Metallicity, and Light Element Abundance Variations
• Chemodynamics of newly identified giants with globular cluster like abundance patterns in the bulge, disk, and halo of the Milky Way
• Tidal radii and destruction rates of globular clusters in the Milky Way due to bulge-bar and disk shocking
• Two Groups of Red Giants with Distinct Chemical Abundances in the Bulge Globular Cluster NGC 6553 Through the Eyes of APOGEE
• Chemical analysis of NGC 6528: one of the most metal-rich bulge globular cluster
• Evidence of AGB pollution in Galactic globular clusters from the Mg-Al anticorrelations observed by the APOGEE survey
• Aluminum Enhanced Metal-Poor Stars buried in the Inner Galaxy
• The Gaia-ESO Survey: low-alpha element stars in the Galactic Bulge
• Homogeneous metallicities and radial velocities for Galactic globular clusters. II. New CaT metallicities for 28 distant and reddened globular clusters
• Discovery of a new stellar sub-population residing in the (inner) stellar halo of the Milky Way
• CAPOS: The bulge Cluster APOgee Survey I. Overview and initial ASPCAP results
• Homogeneous Analysis of Globular Clusters from the APOGEE Survey with the BACCHUS Code $-$ III. $\omega$ Cen
• H-band discovery of additional Second-Generation stars in the Galactic Bulge Globular Cluster NGC 6522 as observed by APOGEE and Gaia
• The Metal-poor non-Sagittarius (?) Globular Cluster NGC 5053: Orbit and Mg, Al and Si Abundances
• Dynamical Orbital classification of selected N-rich stars with \textit{Gaia} DR2 astrometry
• VVV CL001: Likely the Most Metal-Poor Surviving Globular Cluster in the Inner Galaxy
• CN Variations in High Metallicity Globular and Open Clusters
• The enigmatic globular cluster UKS~1 obscured by the bulge: \textit{H}-band discovery of nitrogen-enhanced stars
• APOGEE discovery of a chemically atypical star disrupted from NGC 6723 and captured by the Milky Way bulge
• Exploring the Chemical Composition and Double Horizontal Branch of the Bulge Globular Cluster NGC 6569
• Discovery of a nitrogen-enhanced mildly metal-poor binary system: Possible evidence for pollution from an extinct AGB Star
• APOGEE spectroscopic evidence for chemical anomalies in dwarf galaxies: The case of M~54 and Sagittarius
• Jurassic: A Chemically Anomalous Structure in the Galactic Halo
• Discovery of a large population of Nitrogen-Enhanced stars in the Magellanic Clouds
• Deep Hubble Space Telescope Imaging of Globular Clusters Towards the Galactic Bulge: Observations, Data Reduction and Color-Magnitude Diagrams
• CAPOS: the bulge Cluster APOgee Survey II. The Intriguing "Sequoia" Globular Cluster FSR 1758
• Discovery of Tidal RR LYRAE stars in the Bulge Globular Cluster M 62
• Chemical abundances in the metal-intermediate GC NGC 6723
• The Tale of the Milky Way Globular Cluster NGC 6362 -- I. The Orbit and its possible extended star debris features as revealed by Gaia DR2
• APOGEE-2S Discovery of Light- and Heavy-Element Abundance Correlations in the Bulge Globular Cluster NGC 6380
• The search for extratidal star candidates around Galactic globular clusters NGC 2808, NGC 6266, and NGC 6397 with {\textit{Gaia}} DR2 astrometry
• Searching for Multiple Populations in Ruprecht 106
• Multiple populations in low mass globular clusters: Palomar 13
• APOGEE view of the globular cluster NGC 6544

Cited by in corpus (12)

• Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO) I. An updated census of APOGEE N-rich giants across the Milky Way
• Ca Triplet Metallicities and Velocities for twelve Globular Clusters towards the Galactic Bulge
• CAPOS: The bulge Cluster APOgee Survey V. Elemental abundances of the bulge globular cluster HP 1
• Abundance of zirconium in the globular cluster 47 Tuc: a possible Zr-Na correlation?
• CAPOS: The bulge Cluster APOGEE Survey VI. Characterizing multiple stellar populations and chemical abundances in the bulge globular cluster NGC 6569
• APOGEE-2S Mg-Al anti-correlation of the Metal-Poor Globular Cluster NGC 2298
• Investigating Phosphorus Abundances in a Sample of APOGEE-2 Bulge Globular Clusters
• Neutron-Capture Element Signatures in Globular Clusters: Insights from the Gaia-ESO Survey
• CAPOS: The bulge Cluster APOgee Survey VIII. Final ASPCAP results for all clusters
• CAPOS: The bulge Cluster APOgee Survey VII. First detailed chemical analysis of NGC 6316
• Abundance of strontium in the Galactic globular cluster 47 Tuc
• Multiple Populations in Low-mass Globular Clusters: Eridanus