Chemical evolution of the metal poor Globular Cluster NGC 6809

Abstract

We present the abundances analysis for a sample of 11 red giant branch stars in the metal-poor globular cluster NGC 6809 based on high-resolution spectra. Our main goals are to characterize its chemical composition and analyze this cluster's behavior associated with the Multiple Population (MPs) phenomenon. In our work we obtained the stellar parameters and chemical abundances of 24 elements (O, Na, Mg, Al, Si, Ca, Ti, V, Cr, Mn, Fe, Co, Sc, Ni, Cu, Zn, Y, Zr, Ba, La, Ce, Eu, Nd and Dy). We found a radial velocity of 174.7 $\pm$ 3.2 km $s^{-1}$ and a mean iron content of [Fe/H]=-2.01 $\pm$ 0.02 in good agreement with other studies. Moreover, we found a large spread in the abundances of the light elements O, Na and Al confirming the presence of a Na-O anti-correlation a Na-Al correlation. The Mg-Al anti-correlation is also present in our cluster. The $\alpha$ and iron-peak elements show good agreement with the halo field star trend. The heavy elements are dominated by the r-process.

arXiv comment13 pages, 11 figures, 3 tables, accepted for publication in MNRAS

References in corpus (63)

• First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy
• Neutron capture in low mass Asymptotic Giant Branch stars: cross sections and abundance signatures
• 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
• Stellar Chemical Signatures And Hierarchical Galaxy Formation
• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• Intrinsic iron spread and a new metallicity scale for Globular Clusters
• alpha-, r-, and s-process element trends in the Galactic thin and thick disks
• Na-O Anticorrelation and HB. VIII. Proton-capture elements and metallicities in 17 globular clusters from UVES spectra
• The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
• The Hamburg/ESO R-process Enhanced Star survey (HERES) II. Spectroscopic analysis of the survey sample
• Abundances and Kinematics of Field Halo and Disk Stars I: Observational Data and Abundance Analysis
• A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-Poor Stars
• The ACS Survey of Galactic Globular Clusters. IX. Horizontal Branch Morphology and the Second Parameter Phenomenon
• Predictions for self-pollution in globular cluster stars
• Massive binaries as the source of abundance anomalies in globular clusters
• Non-LTE calculations for neutral Na in late-type stars using improved atomic data
• Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)
• Super-Massive Stars as a Source of Abundance Anomalies of Proton-Capture Elements in Globular Clusters
• A Comparison of Elemental Abundance Ratios in Globular Clusters, Field Stars, and Dwarf Spheroidal Galaxies
• Homogeneous age dating of 55 Galactic globular clusters. Clues to the Galaxy formation mechanisms
• On the self-enrichment scenario of galactic globular clusters: Constraints on the IMF
• New Analyses of Star-to-Star Abundance Variations Among Bright Giants in the Mildly Metal-Poor Globular Cluster M5
• Alpha element abundances and gradients in the Milky Way bulge from FLAMES-GIRAFFE spectra of 650 K giants
• Chemical abundances of the Milky Way thick disk and stellar halo II.: sodium, iron-peak and neutron-capture elements
• An abundance analysis of bright giants in the globular cluster NGC 1851
• Sulphur and zinc abundances in Galactic halo stars revisited
• Light nuclei in galactic globular clusters : constraints on the self-enrichment scenario from nucleosynthesis
• Exploring Anticorrelations and Light Element Variations in Northern Globular Clusters Observed by the APOGEE Survey
• The Gaia-ESO Survey. Mg-Al anti-correlation in iDR4 globular clusters
• Ruprecht 106: the first single population Globular Cluster?
• Light, Alpha, and Fe-Peak Element Abundances in the Galactic Bulge
• The origin and evolution of the odd-Z iron-peak elements Sc, V, Mn, and Co in the Milky Way stellar disk
• On the Perils of Hyperfine Splitting: A reanalysis of Mn and Sc Abundance Trends
• Abundances in Stars from the Red Giant Branch Tip to Near the Main Sequence Turn Off in M5
• Mg, Ba and Eu abundances in thick disk and halo stars
• APOGEE Chemical Abundances of Globular Cluster Giants in the Inner Galaxy
• RR Lyrae Variables in the Globular Cluster M55. The First Evidence for Non Radial Pulsations in RR Lyr Stars
• Calcium and light-elements abundance variations from high resolution spectroscopy in globular clusters
• Young Radio Pulsars in Galactic Globular Clusters
• Terzan 8: a Sagittarius-flavoured globular cluster
• Manganese Abundances in Cluster and Field Stars
• A Comparison of Copper Abundances in Globular Cluster and Halo Field Giant Stars
• Heavy elements and chemical enrichment in globular clusters
• AAOmega spectroscopy of 29 351 stars in fields centered on ten Galactic globular clusters
• Chemical Abundances Of Three Metal-Poor Globular Clusters (NGC 6287, NGC 6293, And NGC 6541) In The Inner Halo
• Chemical analysis of NGC 6528: one of the most metal-rich bulge globular cluster
• The Origin and Chemical Evolution of the Exotic Globular Cluster NGC3201
• Evidence of AGB pollution in Galactic globular clusters from the Mg-Al anticorrelations observed by the APOGEE survey
• The peculiar Na-O anticorrelation of the bulge globular cluster NGC 6440
• The chemical composition of a regular halo globular cluster: NGC 5897
• A spectroscopic study of the Globular Cluster M28 (NGC~6626)
• A spectroscopic study of the Globular Cluster NGC 4147
• Detailed Abundances of 15 Stars in the Metal-Poor Globular Cluster NGC 4833
• The Metal-poor non-Sagittarius (?) Globular Cluster NGC 5053: Orbit and Mg, Al and Si Abundances
• Insights into the chemical composition of the metal-poor Milky Way halo globular cluster NGC 6426
• Sodium abundances of AGB and RGB stars in Galactic globular clusters II. Analysis and results of NGC 104, NGC 6121 and NGC 6809
• A view of the H-band light-element chemical patterns in Globular Clusters under the AGB self-enrichment scenario
• The Potassium abundance in the globular clusters NGC104, NGC6752 and NGC6809
• Chemical Study of the Metal-rich Globular Cluster NGC 5927
• The Gaia-ESO Survey: Detailed Abundances in the Metal-poor Globular Cluster NGC 4372
• Proper motions and membership probabilities of stars in the region of globular cluster NGC 6809
• A proper motion study of the globular cluster M55

Cited by in corpus (13)

• Evidence for a bottom-light initial mass function in massive star clusters
• A Wide-Field View on Multiple Stellar Populations in 28 Milky Way Globular Clusters
• The vertical Na-O relation in the bulge globular cluster NGC 6553
• High Resolution Optical Spectroscopy of Stars in the Sylgr Stellar Stream
• Excess of Ca (and Sc) produced in globular cluster multiple populations: a first census in 77 Galactic globular clusters
• Abundance ties: Nephele and the globular cluster population accreted with $\omega$ Cen. Based on APOGEE DR17 and Gaia EDR3
• Isochrone fitting of Galactic globular clusters -- V. NGC6397 and NGC6809 (M55)
• Chemical analysis of the Bulge Globular Cluster NGC 6553
• Lithium abundances as a tracer of AGB stars pollution in the globular cluster NGC 6752
• Collision-induced mass loss and mass gain on an extremely massive star. An analytical approach and a static proto-globular cluster test-case
• Benchmarking the effective temperature scale of red giant branch stellar models: the case of the metal-poor halo giant HD 122563
• Globular Cluster Intrinsic Iron Abundance Spreads: I. Catalog
• A Main Sequence CH-star in the globular cluster M55 (NGC 6809)