Identifying Uncertainties in Stellar Evolution Models Using the Open Cluster M67
arXiv:2409.04581 · doi:10.3847/2515-5172/ad7093
Abstract
Stellar age estimates are often calculated by interpolating a star's properties in a grid of models. However, different model grids will give different ages for the same star. We used the open cluster M67 to compare four different model grids: DSEP, GARSTEC, MIST, and YREC. Across all model grids, age estimates for main sequence stars were consistently higher than the accepted age of M67, while age estimates for red giant stars were lower. We compared model-generated age and mass values to external constraints as an additional test of the reliability of each model grid. For stars near solar age and metallicity, we recommend using the DSEP model grid to estimate the ages of main sequence stars and the GARSTEC model grid for red giant stars.
References in corpus (9)
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- The Dartmouth Stellar Evolution Database
- A Gaia DR2 view of the Open Cluster population in the Milky Way
- A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
- On using the CMD morphology of M67 to test solar abundances
- The K2 M67 Study: Revisiting old friends with K2 reveals oscillating red giants in the open cluster M67
- The Open Cluster Chemical Abundances and Mapping Survey: VI. Galactic Chemical Gradient Analysis from APOGEE DR17
- The K2 M67 Study: Precise Mass for a Turnoff Star in the Old Open Cluster M67
- Isochrones of M67 with an Expanded Set of Parameters