O, Na, Ba and Eu abundance patterns in open clusters
arXiv:1411.1185 · doi:10.1093/mnras/stu2348
Abstract
Open clusters are historically regarded as single-aged stellar populations representative of star formation within the Galactic disk. Recent literature has questioned this view, based on discrepant Na abundances relative to the field, and concerns about the longevity of bound clusters contributing to a selection bias: perhaps long-lived open clusters are chemically different to the star formation events that contributed to the Galactic disk. We explore a large sample of high resolution Na, O, Ba & Eu abundances from the literature, homogenized as much as reasonable including accounting for NLTE effects, variations in analysis and choice of spectral lines. Compared to a template globular cluster and representative field stars, we find no significant abundance trends, confirming that the process producing the Na-O anti-correlation in globular clusters is not present in open clusters. Furthermore, previously reported Na-enhancement of open clusters is found to be an artefact of NLTE effects, with the open clusters matching a subset of chemically tagged field stars.
arXiv comment6 pages, 3 figures, accepted for publication in MNRAS
References in corpus (47)
- The chemical composition of the Sun
- Embedded Clusters in Molecular Clouds
- Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
- Multiple populations in globular clusters. Lessons learned from the Milky Way 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
- The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
- Properties of stellar generations in Globular Clusters and relations with global parameters
- Target Selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
- Non-LTE calculations for neutral Na in late-type stars using improved atomic data
- The exotic chemical composition of the Sagittarius dwarf Spheroidal galaxy
- Chemical abundance analysis of the Open Clusters Cr110, NGC2099 (M37), NGC2420, NGC7789 and M67 (NGC2682)
- Na-O Anticorrelation And HB I. The Na-O anticorrelation in NGC 2808
- Building the Galactic halo from globular clusters: evidence from chemically unusual red giants
- Pal 12 As A Part of the Sgr Stream; the Evidence From Abundance Ratios
- Element abundances of unevolved stars in the open cluster M 67
- Ruprecht 106: the first single population Globular Cluster?
- NGC 6791: an exotic open cluster or the nucleus of a tidally disrupted galaxy?
- Chemical Homogeneity in Collinder 261 and Implications for Chemical Tagging
- Chemical Homogeneity in the Hyades
- Chemical abundance analysis of the Open Clusters Berkeley 32, NGC 752, Hyades and Praesepe
- Abundance Analysis of Turn-Off and Early Subgiant Stars in the Globular Cluster 47 Tuc (NGC 104)
- Light-element Abundance Variations in the Milky Way Halo
- On the metallicity of open clusters II. Spectroscopy
- The chemical abundance of the very metal rich old Open Clusters NGC 6253 and NGC 6791
- Oxygen abundances in low- and high-alpha field halo stars and the discovery of two field stars born in globular clusters
- Abundances of four open clusters from solar stars
- Searching for multiple stellar populations in the massive, old open cluster Berkeley 39
- Comprehensive abundance analysis of red giants in the open clusters NGC 752, NGC 1817, NGC 2360 and NGC 2506
- Non-LTE Analysis for the Sodium Abundances of Metal-Poor Stars in the Galactic Disk and Halo
- Chemical composition of A and F dwarf members of the Coma Berenices open cluster
- Chemical composition of A and F dwarfs members of the Pleiades open cluster
- The Unique Na:O Abundance Distribution in NGC 6791: The First Open(?) Cluster with Multiple Populations
- High-resolution spectroscopy of the old open cluster Collinder 261:abundances of Iron and other elements
- Zirconium, Barium, Lanthanum and Europium Abundances in Open Clusters
- O and Na abundance patterns in open clusters of the Galactic disk
- Quantitative chemical tagging, stellar ages and the chemo-dynamical evolution of the Galactic disc
- Chemical composition of clump stars in the open cluster NGC 6134
- The Gaia-ESO Survey: Abundance ratios in the inner-disk open clusters Trumpler 20, NGC 4815, NGC 6705
- The Chemical Composition of Praesepe (M44)
- Chemical analysis of giant stars in the young open cluster NGC 3114
- Chemical composition of evolved stars in the open cluster IC 4651
- Chemical composition of evolved stars in the open cluster NGC 2506
- Stellar Nucleosynthesis in the Hyades Open Cluster
- A spectroscopic study of the Open Cluster NGC 6475 (M 7) Chemical Abundances from stars in the range T = 4500-10000 K
- Chemical abundance analysis of the old, rich open cluster Trumpler 20
- On the sodium overabundance of giants in open clusters: The case of the Hyades
Cited by in corpus (30)
- The GALAH Survey: Scientific Motivation
- Multiple Stellar Populations in Globular Clusters
- What is a globular cluster? An observational perspective
- Using chemical tagging to redefine the interface of the Galactic disk and halo
- Abundance scaling in stars, nebulae and galaxies
- Gas expulsion in massive star clusters? Constraints from observations of young and gas-free objects
- The Gaia-ESO Survey: Sodium and aluminium abundances in giants and dwarfs - Implications for stellar and Galactic chemical evolution
- The Habitable Exoplanet Observatory (HabEx) Mission Concept Study Interim Report
- NGC 6535: the lowest mass Milky Way globular cluster with a Na-O anti-correlation? Cluster mass and age in the multiple population context
- The GALAH Survey: Verifying abundance trends in the open cluster M67 using non-LTE spectroscopy
- Evolution of long-lived globular cluster stars III. Effect of the initial helium spread on the position of stars in a synthetic Hertzsprung-Russell diagram
- Searching for GC-like abundance patterns in young massive clusters
- The chemical composition of the oldest nearby open cluster Ruprecht 147
- An extreme paucity of second population AGB stars in the normal globular cluster M4
- Evolution of long-lived globular cluster stars I. Grid of stellar models with helium enhancement at [Fe/H] = -1.75
- ESO452-SC11: The lowest mass globular cluster with a potential chemical inhomogeneity
- NGC 6139: a normal massive globular cluster or a first-generation dominated cluster? Clues from the light elements
- On the Origin of Multiple Populations During Massive Star Cluster Formation
- Deep secrets of intermediate-mass giants and supergiants: Models with rotation seem to overestimate mixing effects on the surface abundances of C, N, and Na
- When does the onset of multiple stellar populations in star clusters occur? Detection of enriched stellar populations in NGC 2121
- On the Nitrogen variation in ~2 Gyr old massive star clusters in the Large Magellanic Cloud
- NGC 6752 AGB Stars Revisited: I. Improved AGB temperatures remove apparent overionisation of Fe I
- Evidence for C and Mg variations in the GD-1 stellar stream
- Chemical composition of giant stars in the open cluster IC 4756
- Searching for globular cluster chemical anomalies on the main sequence of a young massive cluster
- Globular cluster chemistry in fast rotating dwarf stars belonging to intermediate age open clusters
- AGB subpopulations in the nearby globular cluster NGC 6397
- On the formation of globular clusters: comparison with observations
- Rebounding Cores to Build Star Cluster Multiple Populations
- Detailed Abundances of Planet-Hosting Open Clusters. The Praesepe (Beehive) Cluster