Chemical inhomogeneities in the Pleiades: signatures of rocky-forming material in stellar atmospheres

Abstract

The aim of Galactic archaeology is to recover the history of our Galaxy through the information encoded in stars. An unprobed assumption of this field is that the chemical composition of a star is an immutable marker of the gas from which it formed. It is vital to test this assumption on open clusters, group of stars formed from the same gas. Previous investigations have shown that unevolved stars in clusters are chemically homogeneous within the typical uncertainties of these analysis, i.e. 15$\%$ of the elemental abundances. Our strictly differential analysis on five members of the Pleiades allows us to reach precisions of 5$\%$ for most elements and to unveil chemical anomalies within the cluster that could be explained by planet engulfment events. These results reveal that the evolution of planetary systems may alter the chemical composition of stars, challenging our capability of tagging them to their native environments, and also paving the way for the study of planetary architectures and their evolution, through the chemical pattern of their host stars.

arXiv comment10 pages, 2 figures. Accepted for publication in ApJ

References in corpus (43)

• The New Galaxy: Signatures of its Formation
• Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
• The Occurrence and Architecture of Exoplanetary Systems
• The GALAH Survey: Scientific Motivation
• Astrophysical parameters of Galactic open clusters
• The peculiar solar composition and its possible relation to planet formation
• Abundances, Stellar Parameters, and Spectra From the SDSS-III/APOGEE Survey
• High-precision abundances of elements in solar twin stars: Trends with stellar age and elemental condensation temperature
• Effect of episodic accretion on the structure and the lithium depletion of low-mass stars and planet-hosting stars
• Lithium abundances in nearby FGK dwarf and subgiant stars: internal destruction, Galactic chemical evolution, and exoplanets
• Oxygen Abundances in Nearby Stars. Clues to the formation and evolution of the Galactic disk
• The remarkable solar twin HIP 56948: a prime target in the quest for other Earths
• The chemical homogeneity of open clusters
• Near and Mid-IR Photometry of the Pleiades, and a New List of Substellar Candidate Members
• Chemical Homogeneity in the Hyades
• The destruction of inner planetary systems during high-eccentricity migration of gas giants
• Stellar Chemical Abundances: In Pursuit of the Highest Achievable Precision
• The nucleosynthetic history of elements in the Galactic disk: [X/Fe] - age relations from high-precision spectroscopy
• The temporal evolution of neutron-capture elements in the Galactic discs
• The dissimilar chemical composition of the planet-hosting stars of the XO-2 binary system
• Metal-rich accretion and thermohaline instabilities in exoplanets-host stars: consequences on the light elements abundances
• On the origin of stars with and without planets. Tc trends and clues to Galactic evolution
• The Hyades open cluster is chemically inhomogeneous
• Selection Functions in Doppler Planet Searches
• Kronos & Krios: Evidence for accretion of a massive, rocky planetary system in a comoving pair of solar-type stars
• The chemical compositions of solar twins in the open cluster M67
• High precision abundances in the 16 Cyg binary system: a signature of the rocky core in the giant planet
• Chemical Composition of Faint (I~21 mag) Microlensed Bulge Dwarf OGLE-2007-BLG-514S
• Formation, Orbital and Internal Evolutions of Young Planetary Systems
• A high precision chemical abundance analysis of the HAT-P-1 stellar binary: constraints on planet formation
• Chemical signatures of planets: beyond solar-twins
• The Curious Case of Elemental Abundance Differences in the Dual Hot Jupiter Hosts WASP-94AB
• Testing the chemical tagging technique with open clusters
• Planet signatures and effect of the chemical evolution of the Galactic thin-disk stars
• Abundance Differences Between Exoplanet Binary Host Stars XO-2N and XO-2S -- Dependence on Stellar Parameters
• The GAPS Programme with HARPS-N at TNG. X. Differential abundances in the XO-2 planet hosting binary
• The Solar System as an Exoplanetary System
• Revisiting the pre-main-sequence evolution of stars I. Importance of accretion efficiency and deuterium abundance
• Signatures of rocky planet engulfment in HAT-P-4. Implications for chemical tagging studies
• A New Model of Roche-lobe Overflow for Short-Period Gaseous Planets and Binary Stars
• Quantifying Chemical Tagging: Towards Robust Group Finding in the Galaxy
• A temperature condensation trend in the debris-disk binary system Zet2 Ret
• The Gaia-ESO Survey: chemical signatures of rocky accretion in a young solar-type star

Cited by in corpus (20)

• High-precision stellar abundances of the elements - methods and applications
• Chemical (in)homogeneity and atomic diffusion in the open cluster M67
• How magnetic activity alters what we learn from stellar spectra
• Mapping the Galactic Metallicity Gradient with Open Clusters: The State-of-the-Art and Future Challenges
• 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 chemical composition of HIP34407/HIP34426 and other twin-star comoving pairs
• Detailed chemical compositions of planet hosting stars: I. Exploration of possible planet signatures
• Differential abundances of open clusters and their tidal tails: chemical tagging and chemical homogeneity
• Open Cluster Chemical Homogeneity Throughout the Milky Way
• The (im)possibility of strong chemical tagging
• Detailed elemental abundances of binary stars: Searching for signatures of planet formation and atomic diffusion
• Stellar Population Astrophysics (SPA) with TNG. The old open clusters Collinder 350, Gulliver 51, NGC 7044, and Ruprecht 171
• High-precision abundances of first population stars in NGC 2808: confirmation of a metallicity spread
• The peculiar chemical pattern of the WASP-160 binary system: signatures of planetary formation and evolution?
• Testing the chemical homogeneity of chemically tagged dissolved birth clusters
• Disentangling the origin of chemical differences using GHOST
• TOI-1736 and TOI-2141: two systems including sub-Neptunes around solar analogs revealed by TESS and SOPHIE
• The GALAH Survey: Dependence of elemental abundances on age and metallicity for stars in the Galactic disc
• The Radcliffe Wave as traced by young open clusters: Stellar parameters, activity indicators, and abundances of solar-type members of eight young clusters