Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset
We use PyDynamicaLC , a model using the least number of—and the least correlated—degrees of freedom needed to derive a photodynamical model, to describe some of the smallest—and lowest-transit-timing-variation-amplitude—of the Kepler planets. We successfully analyze 64 systems containing 218 planets...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ad91a7 |
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| author | Aviv Ofir Gideon Yoffe Oded Aharonson |
| author_facet | Aviv Ofir Gideon Yoffe Oded Aharonson |
| author_sort | Aviv Ofir |
| collection | DOAJ |
| description | We use PyDynamicaLC , a model using the least number of—and the least correlated—degrees of freedom needed to derive a photodynamical model, to describe some of the smallest—and lowest-transit-timing-variation-amplitude—of the Kepler planets. We successfully analyze 64 systems containing 218 planets, for 88 of which we were able to determine significant masses (to better than 3 σ ). We demonstrate consistency with literature results over 2 orders of magnitude in mass, and for the planets that already had literature mass estimations, we were able to reduce the relative mass error by ∼22% (median value). Of the planets with determined masses, 23 are new mass determinations, with no previous significant literature values, including a planet smaller and lighter than Earth (KOI-1977.02/Kepler-345 b). These results demonstrate the power of photodynamical modeling with the appropriately chosen degrees of freedom. This will become increasingly more important as smaller planets are detected, especially as the TESS mission gathers ever longer baseline light curves and for the analysis of the future PLATO mission data. |
| format | Article |
| id | doaj-art-df31cbb0dee747ecaa51af5ca0d4087f |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj-art-df31cbb0dee747ecaa51af5ca0d4087f2025-01-21T16:10:59ZengIOP PublishingThe Astronomical Journal1538-38812025-01-0116929010.3847/1538-3881/ad91a7Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler DatasetAviv Ofir0https://orcid.org/0000-0002-9152-5042Gideon Yoffe1https://orcid.org/0000-0002-1451-6492Oded Aharonson2https://orcid.org/0000-0001-9930-2495Department of Earth and Planetary Sciences, Weizmann Institute of Science , Rehovot, 76100, Israel ; avivofir@weizmann.ac.ilDepartment of Earth and Planetary Sciences, Weizmann Institute of Science , Rehovot, 76100, Israel ; avivofir@weizmann.ac.il; Department of Statistics and Data Science, The Hebrew University of Jerusalem , Jerusalem, 91905, IsraelDepartment of Earth and Planetary Sciences, Weizmann Institute of Science , Rehovot, 76100, Israel ; avivofir@weizmann.ac.il; Planetary Science Institute , Tucson, AZ 85719, USAWe use PyDynamicaLC , a model using the least number of—and the least correlated—degrees of freedom needed to derive a photodynamical model, to describe some of the smallest—and lowest-transit-timing-variation-amplitude—of the Kepler planets. We successfully analyze 64 systems containing 218 planets, for 88 of which we were able to determine significant masses (to better than 3 σ ). We demonstrate consistency with literature results over 2 orders of magnitude in mass, and for the planets that already had literature mass estimations, we were able to reduce the relative mass error by ∼22% (median value). Of the planets with determined masses, 23 are new mass determinations, with no previous significant literature values, including a planet smaller and lighter than Earth (KOI-1977.02/Kepler-345 b). These results demonstrate the power of photodynamical modeling with the appropriately chosen degrees of freedom. This will become increasingly more important as smaller planets are detected, especially as the TESS mission gathers ever longer baseline light curves and for the analysis of the future PLATO mission data.https://doi.org/10.3847/1538-3881/ad91a7Exoplanet astronomyExoplanet systemsTime series analysis |
| spellingShingle | Aviv Ofir Gideon Yoffe Oded Aharonson Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset The Astronomical Journal Exoplanet astronomy Exoplanet systems Time series analysis |
| title | Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset |
| title_full | Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset |
| title_fullStr | Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset |
| title_full_unstemmed | Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset |
| title_short | Planetary Mass Determinations from a Simplified Photodynamical Model—Application to the Complete Kepler Dataset |
| title_sort | planetary mass determinations from a simplified photodynamical model application to the complete kepler dataset |
| topic | Exoplanet astronomy Exoplanet systems Time series analysis |
| url | https://doi.org/10.3847/1538-3881/ad91a7 |
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