TRAPPIST-1 d: Exo-Venus, Exo-Earth or Exo-Dead?
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866913673777250304 |
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| author | Way, M. J. |
| author_facet | Way, M. J. |
| contents | TRAPPIST-1 d is generally assumed to be at the boundary between a Venus-like world and an Earth-like world, although recently published works on TRAPPIST-1 b and c raise concerns that TRAPPIST-1 d may be similarly devoid of a substantial atmosphere. TRAPPIST-1 d is also relatively understudied in comparison with TRAPPIST-1 e. The latter has generally appeared to be within the habitable zone of most atmospheric modeling studies. Assuming that TRAPPIST-1 d still retains a substantial atmosphere, we demonstrate via a series of 3D general circulation model experiments using a dynamic ocean that the planet could reside within the habitable zone in a narrow parameter space. At the same time, it could also be an exo-Venus or exo-Dead-type world or in transition between between one of these. Studies like this can help distinguish between these types of worlds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00132 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | TRAPPIST-1 d: Exo-Venus, Exo-Earth or Exo-Dead? Way, M. J. Earth and Planetary Astrophysics TRAPPIST-1 d is generally assumed to be at the boundary between a Venus-like world and an Earth-like world, although recently published works on TRAPPIST-1 b and c raise concerns that TRAPPIST-1 d may be similarly devoid of a substantial atmosphere. TRAPPIST-1 d is also relatively understudied in comparison with TRAPPIST-1 e. The latter has generally appeared to be within the habitable zone of most atmospheric modeling studies. Assuming that TRAPPIST-1 d still retains a substantial atmosphere, we demonstrate via a series of 3D general circulation model experiments using a dynamic ocean that the planet could reside within the habitable zone in a narrow parameter space. At the same time, it could also be an exo-Venus or exo-Dead-type world or in transition between between one of these. Studies like this can help distinguish between these types of worlds. |
| title | TRAPPIST-1 d: Exo-Venus, Exo-Earth or Exo-Dead? |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2502.00132 |