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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.08863 |
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| author | Kunimoto, Michelle Lin, Zifan Millholland, Sarah Venner, Alexander Hinkel, Natalie R. Shporer, Avi Vanderburg, Andrew Bailey, Jeremy Brahm, Rafael Burt, Jennifer A. Butler, R. Paul Carter, Brad Ciardi, David R. Collins, Karen A. Collins, Kevin I. Colon, Knicole D. Crane, Jeffrey D. Daylan, Tansu Díaz, Matías R. Doty, John P. Feng, Fabo Guenther, Eike W. Horner, Jonathan Howell, Steve B. Janik, Jan Jones, Hugh R. A. Kabath, Petr Kanodia, Shubham Littlefield, Colin Osborn, Hugh P. O'Toole, Simon Paegert, Martin Pintr, Pavel Schwarz, Richard P. Shectman, Steve Srdoc, Gregor Stassun, Keivan G. Teske, Johanna K. Twicken, Joseph D. Vanzi, Leonardo Wang, Sharon X. Wittenmyer, Robert A. Jenkins, Jon M. Ricker, George R. Seager, Sara Winn, Joshua |
| author_facet | Kunimoto, Michelle Lin, Zifan Millholland, Sarah Venner, Alexander Hinkel, Natalie R. Shporer, Avi Vanderburg, Andrew Bailey, Jeremy Brahm, Rafael Burt, Jennifer A. Butler, R. Paul Carter, Brad Ciardi, David R. Collins, Karen A. Collins, Kevin I. Colon, Knicole D. Crane, Jeffrey D. Daylan, Tansu Díaz, Matías R. Doty, John P. Feng, Fabo Guenther, Eike W. Horner, Jonathan Howell, Steve B. Janik, Jan Jones, Hugh R. A. Kabath, Petr Kanodia, Shubham Littlefield, Colin Osborn, Hugh P. O'Toole, Simon Paegert, Martin Pintr, Pavel Schwarz, Richard P. Shectman, Steve Srdoc, Gregor Stassun, Keivan G. Teske, Johanna K. Twicken, Joseph D. Vanzi, Leonardo Wang, Sharon X. Wittenmyer, Robert A. Jenkins, Jon M. Ricker, George R. Seager, Sara Winn, Joshua |
| contents | We report the validation of multiple planets transiting the nearby ($d = 12.8$ pc) K5V dwarf HD 101581 (GJ 435, TOI-6276, TIC 397362481). The system consists of at least two Earth-size planets whose orbits are near a mutual 4:3 mean-motion resonance, HD 101581 b ($R_{p} = 0.956_{-0.061}^{+0.063}~R_{\oplus}$, $P = 4.47$ days) and HD 101581 c ($R_{p} = 0.990_{-0.070}^{+0.070}~R_{\oplus}$, $P = 6.21$ days). Both planets were discovered in Sectors 63 and 64 TESS observations and statistically validated with supporting ground-based follow-up. We also identify a signal that probably originates from a third transiting planet, TOI-6276.03 ($R_{p} = 0.982_{-0.098}^{+0.114}~R_{\oplus}$, $P = 7.87$ days). These planets are remarkably uniform in size and their orbits are evenly spaced, representing a prime example of the "peas-in-a-pod" architecture seen in other compact multi-planet systems. At $V = 7.77$, HD 101581 is the brightest star known to host multiple transiting planets smaller than $1.5~R_{\oplus}$. HD 101581 is a promising system for atmospheric characterization and comparative planetology of small planets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_08863 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two Earth-size Planets and an Earth-size Candidate Transiting the Nearby Star HD 101581 Kunimoto, Michelle Lin, Zifan Millholland, Sarah Venner, Alexander Hinkel, Natalie R. Shporer, Avi Vanderburg, Andrew Bailey, Jeremy Brahm, Rafael Burt, Jennifer A. Butler, R. Paul Carter, Brad Ciardi, David R. Collins, Karen A. Collins, Kevin I. Colon, Knicole D. Crane, Jeffrey D. Daylan, Tansu Díaz, Matías R. Doty, John P. Feng, Fabo Guenther, Eike W. Horner, Jonathan Howell, Steve B. Janik, Jan Jones, Hugh R. A. Kabath, Petr Kanodia, Shubham Littlefield, Colin Osborn, Hugh P. O'Toole, Simon Paegert, Martin Pintr, Pavel Schwarz, Richard P. Shectman, Steve Srdoc, Gregor Stassun, Keivan G. Teske, Johanna K. Twicken, Joseph D. Vanzi, Leonardo Wang, Sharon X. Wittenmyer, Robert A. Jenkins, Jon M. Ricker, George R. Seager, Sara Winn, Joshua Earth and Planetary Astrophysics We report the validation of multiple planets transiting the nearby ($d = 12.8$ pc) K5V dwarf HD 101581 (GJ 435, TOI-6276, TIC 397362481). The system consists of at least two Earth-size planets whose orbits are near a mutual 4:3 mean-motion resonance, HD 101581 b ($R_{p} = 0.956_{-0.061}^{+0.063}~R_{\oplus}$, $P = 4.47$ days) and HD 101581 c ($R_{p} = 0.990_{-0.070}^{+0.070}~R_{\oplus}$, $P = 6.21$ days). Both planets were discovered in Sectors 63 and 64 TESS observations and statistically validated with supporting ground-based follow-up. We also identify a signal that probably originates from a third transiting planet, TOI-6276.03 ($R_{p} = 0.982_{-0.098}^{+0.114}~R_{\oplus}$, $P = 7.87$ days). These planets are remarkably uniform in size and their orbits are evenly spaced, representing a prime example of the "peas-in-a-pod" architecture seen in other compact multi-planet systems. At $V = 7.77$, HD 101581 is the brightest star known to host multiple transiting planets smaller than $1.5~R_{\oplus}$. HD 101581 is a promising system for atmospheric characterization and comparative planetology of small planets. |
| title | Two Earth-size Planets and an Earth-size Candidate Transiting the Nearby Star HD 101581 |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2412.08863 |