The Gaia-ESO Survey: Chemical tagging in the thin disk. Open clusters blindly recovered in the elemental abundance space

Abstract

The chemical makeup of a star provides the fossil information of the environment where it formed. Under this premise, it should be possible to use chemical abundances to tag stars that formed within the same stellar association. This idea - known as chemical tagging - has not produced the expected results, especially within the thin disk where open stellar clusters have chemical patterns that are difficult to disentangle. The ultimate goal of this study is to probe the feasibility of chemical tagging within the thin disk population using high-quality data from a controlled sample of stars. We also aim at improving the existing techniques of chemical tagging and giving guidance on different strategies of clustering analysis in the elemental abundance space. Here we develop the first blind search of open clusters' members through clustering analysis in the elemental abundance space using the OPTICS algorithm applied to data from the Gaia-ESO survey. First, we evaluate different strategies of analysis, determining which ones are more performing. Second, we apply these methods to a data set including both field stars and open clusters attempting a blind recover of as many open clusters as possible. We show how specific strategies of data analysis can improve the final results. Specifically, we demonstrate that open clusters can be more efficaciously recovered with the Manhattan metric and on a space whose dimensions are carefully selected. Using these (and other) prescriptions we are able to recover open clusters hidden in our data set and find new members of these stellar associations. Our results indicate that there are chances of recovering open clusters' members via clustering analysis in the elemental abundance space. Presumably, the performances of chemical tagging will further increase with higher quality data and more sophisticated clustering algorithms.

arXiv commentAccepted for publication by A&A. 21 pages, 11 figures

References in corpus (58)

• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The New Galaxy: Signatures of its Formation
• The GALAH Survey: Scientific Motivation
• Painting a portrait of the Galactic disc with its stellar clusters
• Gaia EDR3 view on Galactic globular clusters
• Thermohaline mixing: A physical mechanism governing the photospheric composition of low-mass giants
• A consistent explanation for ${}^{12}$C/${}^{13}$C, ${}^7$Li, and ${}^3$He anomalies in red giant stars
• Thermohaline instability and rotation-induced mixing. III - Grid of stellar models and asymptotic asteroseismic quantities from the pre-main sequence up to the AGB for low- and intermediate-mass stars at various metallicities
• Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
• Using chemical tagging to redefine the interface of the Galactic disk and halo
• Chemical tagging with APOGEE: Discovery of a large population of N-rich stars in the inner Galaxy
• The Long-term Evolution of the Galactic Disk Traced by Dissolving Star Clusters
• The chemical homogeneity of open clusters
• Chemical Homogeneity in Collinder 261 and Implications for Chemical Tagging
• Chemical Homogeneity in the Hyades
• Light-element Abundance Variations in the Milky Way Halo
• Galactic Doppelganger: The chemical similarity among field stars and among stars with a common birth origin
• The Gaia-ESO survey: the non-universality of the age-chemical-clocks-metallicity relations in the Galactic disc
• Post first dredge-up [C/N] ratio as age indicator. Theoretical calibration
• Identifying the best iron-peak and $\alpha$-capture elements for chemical tagging: The impact of the number of lines on measured scatter
• Chemical Abundances of Main-Sequence, Turn-off, Subgiant and red giant Stars from APOGEE spectra I: Signatures of Diffusion in the Open Cluster M67
• APOGEE Kinematics I: Overview of the Kinematics of the Galactic Bulge as Mapped by APOGEE
• The Gaia-ESO Survey: a new approach to chemically characterising young open clusters
• Testing the chemical tagging technique with open clusters
• Chemical tagging can work: Identification of stellar phase-space structures purely by chemical-abundance similarity
• Chemical (in)homogeneity and atomic diffusion in the open cluster M67
• How magnetic activity alters what we learn from stellar spectra
• Prospects for chemically tagging stars in the Galaxy
• The Gaia-ESO survey: Calibrating a relationship between Age and the [C/N] abundance ratio with open clusters
• The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics
• Chemical evidence for planetary ingestion in a quarter of Sun-like stars
• The Gaia-ESO Survey: Evidence of atomic diffusion in M67?
• The effect of stellar activity on the spectroscopic stellar parameters of the young solar twin HIP 36515
• How Many Elements Matter?
• Quantitative chemical tagging, stellar ages and the chemo-dynamical evolution of the Galactic disc
• Element abundances in the metal rich open cluster NGC6253
• Chemical separation of disc components using RAVE
• The homogeneity of the star forming environment of the Milky Way disk over time
• The Gaia-ESO Survey: A new approach to chemically characterising young open clusters II. Abundances of the neutron-capture elements Cu, Sr, Y, Zr, Ba, La, and Ce
• Revisiting the 16 Cygni planet host at unprecedented precision and exploring automated tools for precise abundances
• The Gaia-ESO Survey: low-alpha element stars in the Galactic Bulge
• The Gaia-ESO Survey: the selection function of the Milky Way field stars
• Galaxy Genesis -- unravelling the epoch of dissipation in the early disk
• Strong chemical tagging with APOGEE: 21 candidate star clusters that have dissolved across the Milky Way disc
• Open Cluster Chemical Homogeneity Throughout the Milky Way
• The Gaia-ESO Survey: chemical signatures of rocky accretion in a young solar-type star
• The (im)possibility of strong chemical tagging
• Blind chemical tagging with DBSCAN: prospects for spectroscopic surveys
• The dimensionality of stellar chemical space using spectra from the Apache Point Observatory Galactic Evolution Experiment
• Magnetic-buoyancy-induced mixing in AGB Stars: a theoretical explanation of the non-universal [Y/Mg]-age relation
• Stellar Population Astrophysics (SPA) with TNG Atmospheric parameters of members of 16 unstudied open clusters
• APOGEE chemical tagging constraint on the maximum star cluster mass in the $\alpha$-enhanced Galactic disk
• Stellar Population Astrophysics (SPA) with TNG. The old open clusters Collinder 350, Gulliver 51, NGC 7044, and Ruprecht 171
• Stars on the run: escaping from stellar clusters
• A phylogenetic approach to chemical tagging. Reassembling open cluster stars
• Machine learning in APOGEE: Identification of stellar populations through chemical abundances
• Chemo-Dynamical Clustering applied to APOGEE data: Re-Discovering Globular Clusters
• Cosmological surveys with multi-object spectrographs

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• The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation
• Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk
• The GALAH survey: Improving chemical abundances using star clusters
• A baseline on the relation between chemical patterns and birth stellar cluster
• Two faces of Gaia-Sausage-Enceladus: Mining the chemical abundance space with graph attention networks
• Deep chemical tagging -- Identifying open clusters and moving groups in chemical space with graph attention networks