Direct imaging characterization of cool gaseous planets
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915678149148672 |
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| author | Min, Michiel Barstow, Jo Mayorga, Laura C. Wakeford, Hannah Wang, Jason Hu, Renyu Biller, Beth Caballero, José A. Carone, Ludmila Casewell, Sarah Chubb, Katy L. Damiano, Mario Gandhi, Siddharth Muñoz, Antonio García Helling, Christiane Keller, Finnegan Lowson, Nataliea Nasedkin, Evert MacDonald, Ryan Ruffio, Jean-Baptiste Shkolnik, Evgenya Stark, Christopher C. |
| author_facet | Min, Michiel Barstow, Jo Mayorga, Laura C. Wakeford, Hannah Wang, Jason Hu, Renyu Biller, Beth Caballero, José A. Carone, Ludmila Casewell, Sarah Chubb, Katy L. Damiano, Mario Gandhi, Siddharth Muñoz, Antonio García Helling, Christiane Keller, Finnegan Lowson, Nataliea Nasedkin, Evert MacDonald, Ryan Ruffio, Jean-Baptiste Shkolnik, Evgenya Stark, Christopher C. |
| contents | Cool gas giant exoplanets, particularly those with properties similar to those of Jupiter and Saturn, remain poorly characterized due to current observational limitations. This white paper outlines the transformative science case for the Habitable Worlds Observatory (HWO) to directly image and spectroscopically characterize a broad range of gaseous exoplanets with effective temperatures below 400 K. The study focuses on determining key atmospheric properties, including molecular composition, cloud and haze characteristics, and temperature structure, across planets of varying sizes and orbital separations. Leveraging reflected light spectroscopy and polarimetry, HWO will enable comparative planetology of cool gas giants orbiting both solar-type and M-dwarf stars, bridging the observational gap between hot exoplanets and Solar System giants. We present observational requirements and survey strategies necessary to uncover correlations between atmospheric properties and planetary or stellar parameters. This effort will establish critical constraints on planetary formation, cloud microphysics, and the role of photochemistry under diverse irradiation conditions. The unique capabilities of HWO will make it the first facility capable of characterizing true exo-Jupiters in reflected light, thus offering an unprecedented opportunity to place the Solar System in a broader galactic context. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_13766 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Direct imaging characterization of cool gaseous planets Min, Michiel Barstow, Jo Mayorga, Laura C. Wakeford, Hannah Wang, Jason Hu, Renyu Biller, Beth Caballero, José A. Carone, Ludmila Casewell, Sarah Chubb, Katy L. Damiano, Mario Gandhi, Siddharth Muñoz, Antonio García Helling, Christiane Keller, Finnegan Lowson, Nataliea Nasedkin, Evert MacDonald, Ryan Ruffio, Jean-Baptiste Shkolnik, Evgenya Stark, Christopher C. Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Cool gas giant exoplanets, particularly those with properties similar to those of Jupiter and Saturn, remain poorly characterized due to current observational limitations. This white paper outlines the transformative science case for the Habitable Worlds Observatory (HWO) to directly image and spectroscopically characterize a broad range of gaseous exoplanets with effective temperatures below 400 K. The study focuses on determining key atmospheric properties, including molecular composition, cloud and haze characteristics, and temperature structure, across planets of varying sizes and orbital separations. Leveraging reflected light spectroscopy and polarimetry, HWO will enable comparative planetology of cool gas giants orbiting both solar-type and M-dwarf stars, bridging the observational gap between hot exoplanets and Solar System giants. We present observational requirements and survey strategies necessary to uncover correlations between atmospheric properties and planetary or stellar parameters. This effort will establish critical constraints on planetary formation, cloud microphysics, and the role of photochemistry under diverse irradiation conditions. The unique capabilities of HWO will make it the first facility capable of characterizing true exo-Jupiters in reflected light, thus offering an unprecedented opportunity to place the Solar System in a broader galactic context. |
| title | Direct imaging characterization of cool gaseous planets |
| topic | Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2512.13766 |