Population synthesis to constrain Galactic and Stellar Physics- I- Determining age and mass of thin-disc red-giant stars

Abstract

The cornerstone mission Gaia, together with complementary surveys, will revolutionize our understanding of the formation and history of our Galaxy, providing accurate stellar masses, radii, ages, distances, as well as chemical properties for a very large sample of stars across different Galactic stellar populations.Using an improved population synthesis approach and new stellar evolution models we attempt to evaluate the possibility of deriving ages and masses of clump stars from their chemical properties.A new version of the Besancon Galaxy model (BGM) uses new stellar evolutionary tracks computed with STAREVOL.These provide chemical and seismic properties from the PMS to the early-AGB.For the first time, the BGM can explore the effects of an extra-mixing occurring in red-giant stars.In particular we focus on the effects of thermohaline instability on chemical properties as well as on the determination of stellar ages and masses using the surface [C/N] abundance ratio.The impact of extra-mixing on 3He, 12C/13C, N, and [C/N] abundances along the giant branch is quantified.We underline the crucial contribution of asteroseismology to discriminate between evolutionary states of field giants belonging to the Galactic disc.The inclusion of thermohaline instability has a significant impact on 12C/13C,3He as well as on the [C/N] values.We show the efficiency of thermohaline mixing at different metallicities and its influence on the determined stellar mass and age from the observed [C/N] ratio.We then propose simple relations to determine ages and masses from chemical abundances according to these models.We emphasize the usefulness of population synthesis tools to test stellar models and transport processes inside stars.We show that transport processes occurring in red-giant stars should be taken into account in the determination of ages for future Galactic archaeology studies.(abridged)

arXiv comment9 pages, 6 figures

References in corpus (50)

• The chemical composition of the Sun
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• The New Galaxy: Signatures of its Formation
• The Radial Velocity Experiment (RAVE): first data release
• Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• Fast core rotation in red-giant stars revealed by gravity-dominated mixed modes
• Kepler Asteroseismology Program: Introduction and First Results
• Spin down of the core rotation in red giants
• Thermohaline mixing: A physical mechanism governing the photospheric composition of low-mass giants
• The HERMES Spectrometer
• 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
• Thermohaline instability and rotation-induced mixing. I - Low- and intermediate-mass solar metallicity stars up to the end of the AGB
• Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler
• Stellar populations in the Milky Way bulge region : Towards solving the Galactic bulge and bar shapes using 2MASS data
• Radial mixing and the transition between the thick and thin Galactic discs
• Red-giant seismic properties analyzed with CoRoT
• The underlying physical meaning of the ${\nu }_{\max }-{\nu }_{\mathrm{c}}$ relation
• Deep Mixing of He-3: Reconciling Big Bang and Stellar Nucleosynthesis
• Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars
• Period spacings in red giants II. Automated measurement
• Rotational mixing in low-mass stars II. Self-consistent models of Pop II RGB stars
• Carbon, nitrogen and $\alpha$-element abundances determine the formation sequence of the Galactic thick and thin disks
• Constraining the thick disc formation scenario of the Milky Way
• Asymptotic and measured large frequency separations
• The Besancon Galaxy model renewed I. Constraints on the local star formation history from Tycho data
• Numerically determined transport laws for fingering ("thermohaline") convection in astrophysics
• Oscillating K giants with the WIRE satellite: determination of their asteroseismic masses
• Numerical Simulations of Thermohaline Convection: Implications for Extra-Mixing in Low-Mass RGB Stars
• CNONa and 12C/13C in giants of 10 open clusters
• Uncertainties on near-core mixing in red-clump stars: effects on the period spacing and on the luminosity of the AGB bump
• Evidence for a sharp structure variation inside a red-giant star
• The Role of Thermohaline Mixing in Intermediate- and Low-Metallicity Globular Clusters
• The Gaia-ESO Survey: CNO abundances in the open clusters Trumpler 20, NGC 4815, and NGC 6705
• Thermohaline instability and rotation-induced mixing II- Yields of 3He for low- and intermediate-mass stars
• How accurate are stellar ages based on stellar models ? I. The impact of stellar models uncertainties
• Chemical composition of clump stars in the open cluster NGC 6134
• Thermohaline Mixing and its Role in the Evolution of Carbon and Nitrogen Abundances in Globular Cluster Red Giants: The Test Case of Messier 3
• Atmospheric parameters and chemical properties of red giants in the CoRoT asteroseismology fields
• Nitrogen depletion in field red giants: mixing during the He flash?
• Models of red giants in the CoRoT asteroseismology fields combining asteroseismic and spectroscopic constraints
• Effects of thermohaline instability and rotation-induced mixing on the evolution of light elements in the Galaxy : D, 3He and 4He
• Asteroseismology of red giants as a tool for studying stellar populations: first steps
• How accurate are stellar ages based on stellar models? II. The impact of asteroseismology
• Red clump stars of the Milky Way - laboratories of extra-mixing
• Testing the cores of first ascent red-giant stars using the period spacing of g modes
• The extent of mixing in stellar interiors: the open clusters Collinder 261 and Melotte 66
• CNO abundances and carbon isotope ratios in evolved stars of the open clusters NGC 2324, NGC 2477, and NGC 3960
• Galactic Archaeology with CoRoT and APOGEE: Creating mock observations from a chemodynamical model

Cited by in corpus (40)

• Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
• Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates
• StarHorse: A Bayesian tool for determining stellar masses, ages, distances, and extinctions for field stars
• Dynamical heating across the Milky Way disc using APOGEE and $Gaia$
• Accuracy and precision of industrial stellar abundances
• PLATO as it is: a legacy mission for Galactic archaeology
• Age-resolved chemistry of red giants in the solar neighbourhood
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• The Gaia-ESO survey: impact of extra-mixing on C- and N-abundances of giant stars
• The Gaia-ESO survey: Calibrating a relationship between Age and the [C/N] abundance ratio with open clusters
• Abundance-age relations with red clump stars in open clusters
• Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era
• Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the $TESS$ Continuous Viewing Zones and beyond
• Light Elements in the Universe
• The Pan-STARRS1 Proper-motion Survey for Young Brown Dwarfs in Nearby Star-forming Regions. I. Taurus Discoveries and a Reddening-free Classification Method for Ultracool Dwarfs
• APOGEE [C/N] Abundances Across the Galaxy: Migration and Infall from Red Giant Ages
• A self-consistent dynamical model of the Milky Way disc adjusted to Gaia data
• Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model
• Chemical Compositions of Evolved Stars From Near-Infrared IGRINS High-Resolution Spectra. I. Abundances in Three Red Horizontal Branch Stars
• 12C/13C isotopic ratios in red-giant stars of the open cluster NGC 6791
• Nature vs. Nurture: Distinguishing Effects from Stellar Processing and Chemical Evolution on Carbon and Nitrogen in Red Giant Stars
• The Blanco DECam Bulge Survey. I. The Survey Description and Early Results
• Is Thermohaline Mixing the Full Story? Evidence for Separate Mixing Events near the Red Giant Branch Bump
• The Tale of the Milky Way Globular Cluster NGC 6362 -- I. The Orbit and its possible extended star debris features as revealed by Gaia DR2
• The chemical composition of planet building blocks as predicted by stellar population synthesis
• Evidence of extra-mixing in field giants as traced by lithium and carbon isotope ratio
• A new dynamically self-consistent version of the Besançon Galaxy Model
• Characterizing Observed Extra Mixing Trends in Red Giants using the Reduced Density Ratio from Thermohaline Models
• Star Cluster Ages in the Gaia Era
• The behaviour of lithium at high metallicity in the Milky Way -- Selection effects in the samples and the possible role of atomic diffusion
• The search for extratidal star candidates around Galactic globular clusters NGC 2808, NGC 6266, and NGC 6397 with {\textit{Gaia}} DR2 astrometry
• Planetary mass-radius relations across the galaxy
• Chemical abundance analysis of symbiotic giants. Metallicity and CNO abundance patterns in 14 northern S-type systems
• Joint inference of the Milky Way star formation history and IMF from Gaia all-sky $G<13$ data
• The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems
• New stellar age estimates using SPInS based on Gaia DR3 photometry and LAMOST DR8 abundances
• Weighing stars from birth to death: mass determination methods across the HRD
• Gaia21blx: Complete resolution of a binary microlensing event in the Galactic disk
• Calibration of the [C/N] and [Y/Mg] chemical clocks with asteroseismic ages from the TESS space mission
• Two sequences in the age-metallicity relation as seen from [C/N] abundances in APOGEE