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| Format: | Preprint |
| Published: |
2025
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| Online Access: | https://arxiv.org/abs/2509.03549 |
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| _version_ | 1866912572682272768 |
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| author | Mahapatra, Sukdev |
| author_facet | Mahapatra, Sukdev |
| contents | The radius valley -- a deficit of exoplanets between super-Earths and sub-Neptunes -- is a key diagnostic of planet formation and atmospheric evolution. We investigate how the radius valley depends on stellar type by analyzing an updated, transit-only sample of exoplanets from the NASA Exoplanet Archive. Planets are selected with $P < 100$ days and divided by host spectral class (M, K, G, F). We construct weighted radius distributions and apply statistical tests to quantify the valley depth. We recover a pronounced valley centered near $\sim 1.8\,R_\oplus$ for G/K stars, but shifted to $\sim 1.6\,R_\oplus$ for M dwarfs and $\sim 1.9\,R_\oplus$ for F stars. These results support the view that the radius valley is shaped by stellar-dependent processes such as photoevaporation, core-powered mass loss, and orbital migration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_03549 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Revisiting the Radius Valley Across Stellar Types: A Transit-Only Analysis of M, K, G, and F Stars with Updated NASA Exoplanet Archive Data Mahapatra, Sukdev Earth and Planetary Astrophysics The radius valley -- a deficit of exoplanets between super-Earths and sub-Neptunes -- is a key diagnostic of planet formation and atmospheric evolution. We investigate how the radius valley depends on stellar type by analyzing an updated, transit-only sample of exoplanets from the NASA Exoplanet Archive. Planets are selected with $P < 100$ days and divided by host spectral class (M, K, G, F). We construct weighted radius distributions and apply statistical tests to quantify the valley depth. We recover a pronounced valley centered near $\sim 1.8\,R_\oplus$ for G/K stars, but shifted to $\sim 1.6\,R_\oplus$ for M dwarfs and $\sim 1.9\,R_\oplus$ for F stars. These results support the view that the radius valley is shaped by stellar-dependent processes such as photoevaporation, core-powered mass loss, and orbital migration. |
| title | Revisiting the Radius Valley Across Stellar Types: A Transit-Only Analysis of M, K, G, and F Stars with Updated NASA Exoplanet Archive Data |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2509.03549 |