A Compact Multi-Planet System of Three Transiting Giant Planets Around TIC118798035
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911226151305216 |
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| author | Brahm, Rafael Trifonov, Trifon Jordán, Andrés Henning, Thomas Espinoza, Néstor Rojas, Felipe I. Pinto, Marcelo Tala Jones, Matías I. Thorngren, Daniel Acuña, Lorena Eberhardt, Jan Reinarz, Yared Salinas, Helem Vítková, Michaela Espinoza-Retamal, Juan I. Bakos, Gaspar Bódi, Attila Boyle, Gavin Csubry, Zoltan Hartman, Joel Keyes, Anthony Suc, Vincent Talens, Geert Jan |
| author_facet | Brahm, Rafael Trifonov, Trifon Jordán, Andrés Henning, Thomas Espinoza, Néstor Rojas, Felipe I. Pinto, Marcelo Tala Jones, Matías I. Thorngren, Daniel Acuña, Lorena Eberhardt, Jan Reinarz, Yared Salinas, Helem Vítková, Michaela Espinoza-Retamal, Juan I. Bakos, Gaspar Bódi, Attila Boyle, Gavin Csubry, Zoltan Hartman, Joel Keyes, Anthony Suc, Vincent Talens, Geert Jan |
| contents | We report the discovery and characterization of three transiting giant planets in the TIC118798035 system. The three planets were identified as transiting candidates from data of the TESS mission, and confirmed with ground-based photometric transit observations along with radial velocity variations obtained with FEROS, HARPS and ESPRESSO. The three planets present transit timing variations (TTVs). We performed a N-body orbital fitting to the TTVs and radial velocities finding that TIC118798035 b is as warm low-density Neptune with a mass of 0.0250$\pm$0.0023 $M_J$, a radius of 0.655$\pm$0.018 $R_J$, and an orbital period of 11.507 d; TIC118798035 c is a warm Saturn with a mass of 0.403$\pm$0.024 $M_J$, a radius of 0.973$\pm$0.023 $R_J$, and an orbital period of 22.564 d; and TIC118798035 d is a warm Jupiter with a mass of 0.773$\pm$0.052 $M_J$, a radius of 0.923$\pm$0.044 $R_J$, and an orbital period of 48.925 d. The bulk metallicities of the three planets don't fully follow the mass-metallicity correlation found for the giant planets of the solar system, which hints at a somewhat different formation history for the planets of the TIC118798035 system. TIC118798035 is the only system having more than two transiting planets larger than 0.5 $R_J$ with a precise orbital and physical characterization, amenable for future atmospheric studies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_19162 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Compact Multi-Planet System of Three Transiting Giant Planets Around TIC118798035 Brahm, Rafael Trifonov, Trifon Jordán, Andrés Henning, Thomas Espinoza, Néstor Rojas, Felipe I. Pinto, Marcelo Tala Jones, Matías I. Thorngren, Daniel Acuña, Lorena Eberhardt, Jan Reinarz, Yared Salinas, Helem Vítková, Michaela Espinoza-Retamal, Juan I. Bakos, Gaspar Bódi, Attila Boyle, Gavin Csubry, Zoltan Hartman, Joel Keyes, Anthony Suc, Vincent Talens, Geert Jan Earth and Planetary Astrophysics Solar and Stellar Astrophysics We report the discovery and characterization of three transiting giant planets in the TIC118798035 system. The three planets were identified as transiting candidates from data of the TESS mission, and confirmed with ground-based photometric transit observations along with radial velocity variations obtained with FEROS, HARPS and ESPRESSO. The three planets present transit timing variations (TTVs). We performed a N-body orbital fitting to the TTVs and radial velocities finding that TIC118798035 b is as warm low-density Neptune with a mass of 0.0250$\pm$0.0023 $M_J$, a radius of 0.655$\pm$0.018 $R_J$, and an orbital period of 11.507 d; TIC118798035 c is a warm Saturn with a mass of 0.403$\pm$0.024 $M_J$, a radius of 0.973$\pm$0.023 $R_J$, and an orbital period of 22.564 d; and TIC118798035 d is a warm Jupiter with a mass of 0.773$\pm$0.052 $M_J$, a radius of 0.923$\pm$0.044 $R_J$, and an orbital period of 48.925 d. The bulk metallicities of the three planets don't fully follow the mass-metallicity correlation found for the giant planets of the solar system, which hints at a somewhat different formation history for the planets of the TIC118798035 system. TIC118798035 is the only system having more than two transiting planets larger than 0.5 $R_J$ with a precise orbital and physical characterization, amenable for future atmospheric studies. |
| title | A Compact Multi-Planet System of Three Transiting Giant Planets Around TIC118798035 |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2510.19162 |