Chemo-dynamics and asteroseismic ages of seven metal-poor red giants
  from the Kepler field
  In this work we combine information from solar-like oscillations,
high-resolution spectroscopy and Gaia astrometry to derive stellar ages,
chemical abundances and kinematics for a group of seven metal-poor Red Giants
and characterise them in a multidimensional chrono-chemo-dynamical space.
Chemical abundance ratios were derived through classical spectroscopic analysis
employing 1D LTE atmospheres on Keck/HIRES spectra. Stellar ages, masses and
radii were calculated with grid-based modelling, taking advantage of
availability of asteroseismic information from Kepler. The dynamical properties
were determined with Galpy using Gaia EDR3 astrometric solutions. Our results
suggest that underestimated parallax errors make the effect of Gaia parallaxes
more important than different choices of model grid or -- in the case of stars
ascending the RGB -- mass-loss prescription. Two of the stars in this study are
identified as potentially evolved halo blue stragglers. Four objects are likely
members of the accreted Milky Way halo, and their possible relationship with
known accretion events is discussed.
