TESS Hunt for Young and Maturing Exoplanets (THYME) XIV: A Comoving-Based Age Constraint for KELT-20
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914361679806464 |
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| author | Distler, Adam Soares-Furtado, Melinda Mann, Andrew W. Kraus, Adam L. Gagné, Jonathan Becker, Juliette Narayan, Ritvik Sai Clark, Max Vanderburg, Andrew Rodriguez, Joseph E. Rogers, Laura K. Kerr, Ronan |
| author_facet | Distler, Adam Soares-Furtado, Melinda Mann, Andrew W. Kraus, Adam L. Gagné, Jonathan Becker, Juliette Narayan, Ritvik Sai Clark, Max Vanderburg, Andrew Rodriguez, Joseph E. Rogers, Laura K. Kerr, Ronan |
| contents | Young stellar moving groups offer unique opportunities to investigate the early evolution of stellar and planetary systems. In continuation of an ongoing effort to age-date compelling planetary systems, we provide an in-depth age analysis of KELT-20, a young A-type star that hosts a well-aligned ultra-hot Jupiter. This system poses a useful case study to investigate migration mechanisms at early stages of evolution. Using Gaia DR3 data, we identify 77 stars with proper motions consistent with KELT-20, including 19 with measured radial velocities that enable full 3D kinematic confirmation. Using isochronal analyses, gyrochronology, photometric variability, and stellar activity indicators, we converge on an age of $58 \pm 5\,$Myr. This constraint provides critical insights into the dynamical processes shaping hot Jupiter formation. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_01313 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | TESS Hunt for Young and Maturing Exoplanets (THYME) XIV: A Comoving-Based Age Constraint for KELT-20 Distler, Adam Soares-Furtado, Melinda Mann, Andrew W. Kraus, Adam L. Gagné, Jonathan Becker, Juliette Narayan, Ritvik Sai Clark, Max Vanderburg, Andrew Rodriguez, Joseph E. Rogers, Laura K. Kerr, Ronan Earth and Planetary Astrophysics Solar and Stellar Astrophysics Young stellar moving groups offer unique opportunities to investigate the early evolution of stellar and planetary systems. In continuation of an ongoing effort to age-date compelling planetary systems, we provide an in-depth age analysis of KELT-20, a young A-type star that hosts a well-aligned ultra-hot Jupiter. This system poses a useful case study to investigate migration mechanisms at early stages of evolution. Using Gaia DR3 data, we identify 77 stars with proper motions consistent with KELT-20, including 19 with measured radial velocities that enable full 3D kinematic confirmation. Using isochronal analyses, gyrochronology, photometric variability, and stellar activity indicators, we converge on an age of $58 \pm 5\,$Myr. This constraint provides critical insights into the dynamical processes shaping hot Jupiter formation. |
| title | TESS Hunt for Young and Maturing Exoplanets (THYME) XIV: A Comoving-Based Age Constraint for KELT-20 |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2603.01313 |