Identifying Uncertainties in Stellar Evolution Models Using the Open Cluster M67
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866912018087280640 |
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| author | Byrom, Susan Tayar, Jamie |
| author_facet | Byrom, Susan Tayar, Jamie |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_04581 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Identifying Uncertainties in Stellar Evolution Models Using the Open Cluster M67 Byrom, Susan Tayar, Jamie Solar and Stellar Astrophysics Astrophysics of Galaxies 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. |
| title | Identifying Uncertainties in Stellar Evolution Models Using the Open Cluster M67 |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2409.04581 |