Constraining the solar neighbourhood age-metallicity relation from white dwarf-main sequence binaries
arXiv:2105.13379 · doi:10.1093/mnras/stab1559
Abstract
The age-metallicity relation is a fundamental tool for constraining the chemical evolution of the Galactic disc. In this work we analyse the observational properties of this relation using binary stars that have not interacted consisting of a white dwarf - from which we can derive the total age of the system - and a main sequence star - from which we can derive the metallicity as traced by the [Fe/H] abundances. Our sample consists of 46 widely separated, but unresolved spectroscopic binaries identified within the Sloan Digital Sky Survey, and 189 white dwarf plus main sequence common proper motion pairs identified within the second data release of Gaia. This is currently the largest white dwarf sample for which the metallicity of their progenitors have been determined. We find a flat age-metallicity relation displaying a scatter of [Fe/H] abundances of approximately 0.5 dex around the solar metallicity at all ages. This independently confirms the lack of correlation between age and metallicity in the solar neighbourhood that is found in previous studies focused on analysing single main sequence stars and open clusters.
Accepted for publication by MNRAS
References in corpus (23)
- The Gaia mission
- New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
- Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
- A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties
- An Analysis of the Shapes of Interstellar Extinction Curves. VII. Milky Way Spectrophotometric Optical-through-Ultraviolet Extinction and Its R-Dependence
- Three-dimensional mapping of the local interstellar medium with composite data
- The initial-final mass relationship of white dwarfs revisited: effect on the luminosity function and mass distribution
- Radial mixing and the transition between the thick and thin Galactic discs
- Vertical distribution of Galactic disk stars IV - AMR and AVR from clump giants
- Post Common Envelope Binaries from SDSS. I: 101 white dwarf main sequence binaries with multiple SDSS spectroscopy
- Abundance to age ratios in the HARPS-GTO sample with Gaia DR2: Chemical clocks for a range of [Fe/H]
- High-precision abundances of elements in solar-type stars. Evidence of two distinct sequences in abundance-age relations
- white dwarfs within 40 pc II: the volume-limited northern hemisphere sample
- White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up
- Stellar parameters of early M dwarfs from ratios of spectral features at optical wavelengths
- white dwarfs within 40 pc I: spectroscopic observations of new candidates
- A catalog of wide binary and multiple systems of bright stars from Gaia-DR2 and the Virtual Observatory
- Stellar loci II. a model-free estimate of the binary fraction for field FGK stars
- Metallicity determination of M dwarfs - Expanded parameter range in metallicity and effective temperature
- The Gaia DR2 halo white dwarf population: the luminosity function, mass distribution and its star formation history
- The age-metallicity relation in the solar neighbourhood from a pilot sample of white dwarf-main sequence binaries
- Age-metallicity dependent stellar kinematics of the Milky Way disc from LAMOST and Gaia
- New Teff and [Fe/H] spectroscopic calibration for FGK dwarfs and GK giants
Cited by in corpus (4)
- White dwarf-main sequence binaries from Gaia EDR3: the unresolved 100pc volume-limited sample
- Stellar dating using chemical clocks and Bayesian inference
- Gaia0007-1605: an old triple system with an inner brown dwarf-white dwarf binary and an outer white dwarf companion
- White Dwarf Photospheric Abundances in Cataclysmic Variables -- II. White Dwarfs With and Without a Mask