A seismic scaling relation for stellar age II: The red giant branch
  Owing to their simplicity and ease of application, seismic scaling relations
are widely used to determine the properties of stars exhibiting solar-like
oscillations, such as solar twins and red giants. So far, no seismic scaling
relations for determining the ages of red giant stars have been developed. Such
relations would be desirable for galactic archaeology, which uses stellar ages
to map the history of the Milky Way. The ages of red giants must instead be
estimated with reference to grids of theoretical stellar models, which can be
computationally intensive. Here I present an exhaustive search for scaling age
relations involving different combinations of observable quantities. The
candidate scaling relations are calibrated and tested using more than 1,000 red
giant stars whose ages were obtained via grid-based modeling. I report multiple
high-quality scaling relations for red giant branch stars, the best of which
are shown to be approximately as accurate as grid-based modeling with typical
uncertainties of 15%. Additionally, I present new scaling mass and radius
relations for red giants as well.
