Chemodynamic evolution of Sun-like stars in nearby moving groups

Abstract

Sun-like stars are well represented in the solar neighbourhood but are currently under-utilised, with many studies of chemical and kinematic evolution focusing on red giants (which can be observed further away) or turn-off stars (which have well measured ages). Recent surveys (e.g. GALAH) provide spectra for large numbers of nearby Sun-like stars, which provides an opportunity to apply our newly developed method for measuring metallicities, temperatures, and surface gravities - the EPIC algorithm - which yields improved ages via isochrone fitting. We test this on moving groups, by applying it to the large GALAH DR3 sample. This defines a sample of 72,288 solar analogue targets for which the stellar parameter measurements are most precise and reliable. These stars are used to estimate, and test the accuracy and precision of, age measurements derived with the SAMD isochrone fitting algorithm. Using these ages, we recover the age-metallicity relationships for nearby (<= 1 kpc) moving groups, traced by solar analogues, and analyse them with respect to the stellar kinematics. In particular, we found that the age-metallicity relationships of all moving groups follows a particular trend of young (age < 6 Gyr) stars having constant metallicity and older (age >= 6 Gyr) stars decreasing in metallicity with increasing age. The Hercules stream carries the highest fraction of metal-rich young stars (~ 0.1 dex) in our sample, which is consistent with a migrating population of stars from the inner Galaxy, and we discuss the possible causes of this migration in the context of our results.

arXiv comment13 pages, 10 figures, accepted to MNRAS

References in corpus (72)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Gaia Data Release 3: Summary of the content and survey properties
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• galpy: A Python Library for Galactic Dynamics
• First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
• Star Formation Histories, Abundances and Kinematics of Dwarf Galaxies in the Local Group
• The New Galaxy: Signatures of its Formation
• The mass distribution and gravitational potential of the Milky Way
• Radial Mixing in Galactic Discs
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Chemical evolution with radial mixing
• Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole
• The Effect of the Outer Lindblad Resonance of the Galactic Bar on the Local Stellar Velocity Distribution
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• A direct dynamical measurement of the Milky Way's disk surface density profile, disk scale length, and dark matter profile at 4 kpc < R < 9 kpc
• A Catalog of Detailed Visual Morphological Classifications for 14034 Galaxies in the Sloan Digital Sky Survey
• The Evolution of the Star-forming Interstellar Medium across Cosmic Time
• The RAdial Velocity Experiment (RAVE): Fourth data release
• Secular Evolution in Disk Galaxies
• The Distribution of Nearby Stars in Velocity Space Inferred from Hipparcos Data
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
• APOGEE Data Releases 13 and 14: Data and Analysis
• Actions for axisymmetric potentials
• The PASTEL catalogue of stellar parameters
• The PASTEL catalogue: 2016 version
• Dynamical heating across the Milky Way disc using APOGEE and $Gaia$
• Estimating stellar birth radii and the time evolution of the Milky Way's ISM metallicity gradient
• The age-metallicity structure of the Milky Way disk
• Radial Migration Does Little for Galactic Disc Thickening
• Age dissection of the Milky Way discs: red giants in the Kepler field
• Evolution of the Milky Way with radial motions of stars and gas I. The solar neighborhood and the thin and thick disk
• The stellar velocity distribution in the solar neighbourhood
• On the origin of the chemical bimodality of disk stars: A tale of merger and migration
• Classical Cepheid Pulsation Models. X. The Period-Age Relation
• Measuring Radial Orbit Migration in the Milky Way Disk
• Signatures of radial migration in barred galaxies: Azimuthal variations in the metallicity distribution of old stars
• APOGEE Data Releases 13 and 14: Stellar Parameter and Abundance Comparisons With Independent Analyses
• The Proper Motion of Sagittarius A*: III. The Case for a Supermassive Black Hole
• Disk heating by more than one spiral density wave
• Spiral-induced velocity and metallicity patterns in a cosmological zoom simulation of a Milky Way-sized galaxy
• Simulations of the heating of the Galactic stellar disc
• The Galactic radial abundance gradients of C, N, O, Ne, S, Cl and Ar from deep spectra of H II regions
• The Rich Are Different: Evidence from the RAVE Survey for Stellar Radial Migration
• Early turbulent mixing as the origin of chemical homogeneity in open star clusters
• The Effects of Radial Migration on the Vertical Structure of Galactic Discs
• Quantifying stellar radial migration in an N-body simulation: blurring, churning, and the outer regions of galaxy discs
• The Gaia-ESO survey: mapping the shape and evolution of the radial abundance gradients with open clusters
• Fundamental relations for the velocity dispersion of stars in the Milky Way
• Why the Milky Way's bulge is not only a bar formed from a cold thin disk
• Chemical abundances in the nucleus of the Sagittarius dwarf spheroidal galaxy
• The Open Cluster Chemical Abundances and Mapping Survey: VI. Galactic Chemical Gradient Analysis from APOGEE DR17
• Assessment of [Fe/H] determinations for FGK stars in spectroscopic surveys
• Metallicity Structure in the Milky Way Disk Revealed by Galactic HII Regions
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• The Open Cluster Chemical Abundances and Mapping Survey: II. Precision Cluster Abundances for APOGEE using SDSS DR14
• Stellar ages, masses, extinctions and orbital parameters based on spectroscopic parameters of Gaia DR3
• Escapees from the bar resonances. On the presence of low-eccentricity, metal-rich stars at the Solar vicinity
• On the origin of the Galactic thin and thick discs, their abundance gradients and the diagnostic potential of their abundance ratios
• Beyond the two-infall model I. Indications for a recent gas infall with Gaia DR3 chemical abundances
• Constraining churning and blurring in the Milky Way using large spectroscopic surveys -- an exploratory study
• Gravitational scattering of stars and clusters and the heating of the Galactic disk
• Mixing of metals during star cluster formation: statistics and implications for chemical tagging
• Oxygen, sulfur, and iron radial abundance gradients of classical Cepheids across the Galactic thin disk
• The role of radial migration in open cluster and field star populations with Gaia dr3
• The Gaia-ESO Survey: Old super-metal-rich visitors from the inner Galaxy
• Efficient radial migration by giant molecular clouds in the first several hundred Myr after the stellar birth

Cited by in corpus (4)

• Probing the origins. I. Generalised Additive Model inference of birth radii for Milky Way stars in the solar vicinity
• Milky Way's Metal-Poor Stars display Chemical Transition near the Solar Radius
• Comparing radial migration in dark matter and MOND regimes
• First large scale spatial and velocity patterns of local metal-rich stars in the Milky Way