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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.20119 |
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| _version_ | 1866911285112733696 |
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| author | Carleo, Ilaria Nowak, Grzegorz Murgas, Felipe Pallé, Enric Lacedelli, Gaia Masseron, Thomas Wong, Emily W. Castro-González, Amadeo Jankowski, Dawid Eggenberger, Patrick Jenkins, James S. Goździewski, Krzysztof Bourrier, Vincent Alves, Douglas R. Vines, José I. Stassun, Keivan G. Brogi, Matteo Messina, Sergio Clark, Catherine A. Collins, Karen A. Deeg, Hans J. Furlan, Elise Gandolfi, Davide González, Samuel Geraldía Hellier, Coel Hatzes, Artie P. Howell, Steve B. Korth, Judith Knudstrup, Emil Lillo-Box, Jorge Livingston, John H. Orell-Miquel, Jaume Persson, Carina Redfield, Seth Safonov, Boris Baker, David Delgado, Rafael Delfin Barrena Bieryla, Allyson Boyle, Andrew Bosch-Cabot, Pau Barris, Núria Casasayas Chairetas, Stavros Ciardi, David R. Fukui, Akihiko Guerra, Pere Kawauchi, Kiyoe Libotte, Florence Lund, Michael B. Luque, Rafael de Escalante, Eduardo Lorenzo Martín Guerrero Massey, Bob Michaels, Edward J. Morello, Giuseppe Narita, Norio Parvianien, Hannu Schwarz, Richard P. Shporer, Avi Stangret, Monika Watkins, Cristilyn N. |
| author_facet | Carleo, Ilaria Nowak, Grzegorz Murgas, Felipe Pallé, Enric Lacedelli, Gaia Masseron, Thomas Wong, Emily W. Castro-González, Amadeo Jankowski, Dawid Eggenberger, Patrick Jenkins, James S. Goździewski, Krzysztof Bourrier, Vincent Alves, Douglas R. Vines, José I. Stassun, Keivan G. Brogi, Matteo Messina, Sergio Clark, Catherine A. Collins, Karen A. Deeg, Hans J. Furlan, Elise Gandolfi, Davide González, Samuel Geraldía Hellier, Coel Hatzes, Artie P. Howell, Steve B. Korth, Judith Knudstrup, Emil Lillo-Box, Jorge Livingston, John H. Orell-Miquel, Jaume Persson, Carina Redfield, Seth Safonov, Boris Baker, David Delgado, Rafael Delfin Barrena Bieryla, Allyson Boyle, Andrew Bosch-Cabot, Pau Barris, Núria Casasayas Chairetas, Stavros Ciardi, David R. Fukui, Akihiko Guerra, Pere Kawauchi, Kiyoe Libotte, Florence Lund, Michael B. Luque, Rafael de Escalante, Eduardo Lorenzo Martín Guerrero Massey, Bob Michaels, Edward J. Morello, Giuseppe Narita, Norio Parvianien, Hannu Schwarz, Richard P. Shporer, Avi Stangret, Monika Watkins, Cristilyn N. |
| contents | As part of the KESPRINT collaboration, we present the discovery and characterization of three exoplanets in the sub-Neptune to super-Neptune regime, spanning key regions of the exo-Neptunian landscape. TOI-1472c and TOI-1648b are newly discovered sub-Neptunes, while TOI-1472b is a previously known super-Neptune for which we provide an improved mass measurement. These planets have orbital periods of 6--15 days and radii of 2.5--4.1 R$_\oplus$, probing regions where planet formation and atmospheric evolution remain poorly understood. We combine TESS transit photometry with ground-based radial velocities to determine precise masses, radii, and orbital properties. TOI-1472b has a mass of $18.0^{+0.84}_{-0.85}$ M$_\oplus$ and a radius of $4.06 \pm 0.10$ R$_\oplus$, TOI-1472c has a mass of $21.1^{+0.96}_{-0.99}$ M$_\oplus$ and a radius of $3.33 \pm 0.08$ R$_\oplus$, and TOI-1648b has a mass of $7.4^{+1.1}_{-1.3}$ M$_\oplus$ and a radius of $2.54^{+0.14}_{-0.12}$ R$_\oplus$. The planets exhibit a range of eccentricities (0.041--0.178), indicating diverse evolutionary histories. TOI-1648b, with a high Transmission Spectroscopy Metric (TSM $\sim$59), is a promising target for atmospheric characterization. Together, these three planets provide precise constraints on the structure, composition, and dynamical evolution of small to intermediate-sized exoplanets, enriching our understanding of the exo-Neptunian landscape. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_20119 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Precise mass and radius determination for two new and one known Neptune-sized planets around G Dwarf hosts Carleo, Ilaria Nowak, Grzegorz Murgas, Felipe Pallé, Enric Lacedelli, Gaia Masseron, Thomas Wong, Emily W. Castro-González, Amadeo Jankowski, Dawid Eggenberger, Patrick Jenkins, James S. Goździewski, Krzysztof Bourrier, Vincent Alves, Douglas R. Vines, José I. Stassun, Keivan G. Brogi, Matteo Messina, Sergio Clark, Catherine A. Collins, Karen A. Deeg, Hans J. Furlan, Elise Gandolfi, Davide González, Samuel Geraldía Hellier, Coel Hatzes, Artie P. Howell, Steve B. Korth, Judith Knudstrup, Emil Lillo-Box, Jorge Livingston, John H. Orell-Miquel, Jaume Persson, Carina Redfield, Seth Safonov, Boris Baker, David Delgado, Rafael Delfin Barrena Bieryla, Allyson Boyle, Andrew Bosch-Cabot, Pau Barris, Núria Casasayas Chairetas, Stavros Ciardi, David R. Fukui, Akihiko Guerra, Pere Kawauchi, Kiyoe Libotte, Florence Lund, Michael B. Luque, Rafael de Escalante, Eduardo Lorenzo Martín Guerrero Massey, Bob Michaels, Edward J. Morello, Giuseppe Narita, Norio Parvianien, Hannu Schwarz, Richard P. Shporer, Avi Stangret, Monika Watkins, Cristilyn N. Earth and Planetary Astrophysics As part of the KESPRINT collaboration, we present the discovery and characterization of three exoplanets in the sub-Neptune to super-Neptune regime, spanning key regions of the exo-Neptunian landscape. TOI-1472c and TOI-1648b are newly discovered sub-Neptunes, while TOI-1472b is a previously known super-Neptune for which we provide an improved mass measurement. These planets have orbital periods of 6--15 days and radii of 2.5--4.1 R$_\oplus$, probing regions where planet formation and atmospheric evolution remain poorly understood. We combine TESS transit photometry with ground-based radial velocities to determine precise masses, radii, and orbital properties. TOI-1472b has a mass of $18.0^{+0.84}_{-0.85}$ M$_\oplus$ and a radius of $4.06 \pm 0.10$ R$_\oplus$, TOI-1472c has a mass of $21.1^{+0.96}_{-0.99}$ M$_\oplus$ and a radius of $3.33 \pm 0.08$ R$_\oplus$, and TOI-1648b has a mass of $7.4^{+1.1}_{-1.3}$ M$_\oplus$ and a radius of $2.54^{+0.14}_{-0.12}$ R$_\oplus$. The planets exhibit a range of eccentricities (0.041--0.178), indicating diverse evolutionary histories. TOI-1648b, with a high Transmission Spectroscopy Metric (TSM $\sim$59), is a promising target for atmospheric characterization. Together, these three planets provide precise constraints on the structure, composition, and dynamical evolution of small to intermediate-sized exoplanets, enriching our understanding of the exo-Neptunian landscape. |
| title | Precise mass and radius determination for two new and one known Neptune-sized planets around G Dwarf hosts |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2511.20119 |