Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267
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| Format: | Preprint |
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2025
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| author | Zúñiga-Fernández, S. Pozuelos, F. J. Dévora-Pajares, M. Cuello, N. Greklek-McKeon, M. Stassun, K. G. Van Grootel, V. Rojas-Ayala, B. Korth, J. Günther, M. N. Burgasser, A. J. Hsu, C. Rackham, B. V. Barkaoui, K. Timmermans, M. Cadieux, C. Alonso, R. Strakhov, I. A. Howell, S. B. Littlefield, C. Furlan, E. Amado, P. J. Jenkins, J. M. Twicken, J. D. Sucerquia, M. Davis, Y. T. Schanche, N. Collins, K. A. Burdanov, A. Davoudi, F. Demory, B. -O. Delrez, L. Dransfield, G. Ducrot, E. Garcia, L. J. Gillon, M. Chew, Y. Gómez Maqueo Muñoz, C. Janó Jehin, E. Murray, C. A. Niraula, P. Pedersen, P. P. Queloz, D. Rebolo-López, R. Scott, M. G. Sebastian, D. Hooton, M. J. Thompson, S. J. Triaud, A. H. M. J. de Wit, J. Ghachoui, M. Benkhaldoun, Z. Doyon, R. Lafrenière, D. Casanova, V. Sota, A. Plauchu-Frayn, I. Khandelwal, A. Lang, F. Zong Schroffenegger, U. Wampfler, S. Lendl, M. Schwarz, R. P. Murgas, F. Palle, E. Parviainen, H. |
| author_facet | Zúñiga-Fernández, S. Pozuelos, F. J. Dévora-Pajares, M. Cuello, N. Greklek-McKeon, M. Stassun, K. G. Van Grootel, V. Rojas-Ayala, B. Korth, J. Günther, M. N. Burgasser, A. J. Hsu, C. Rackham, B. V. Barkaoui, K. Timmermans, M. Cadieux, C. Alonso, R. Strakhov, I. A. Howell, S. B. Littlefield, C. Furlan, E. Amado, P. J. Jenkins, J. M. Twicken, J. D. Sucerquia, M. Davis, Y. T. Schanche, N. Collins, K. A. Burdanov, A. Davoudi, F. Demory, B. -O. Delrez, L. Dransfield, G. Ducrot, E. Garcia, L. J. Gillon, M. Chew, Y. Gómez Maqueo Muñoz, C. Janó Jehin, E. Murray, C. A. Niraula, P. Pedersen, P. P. Queloz, D. Rebolo-López, R. Scott, M. G. Sebastian, D. Hooton, M. J. Thompson, S. J. Triaud, A. H. M. J. de Wit, J. Ghachoui, M. Benkhaldoun, Z. Doyon, R. Lafrenière, D. Casanova, V. Sota, A. Plauchu-Frayn, I. Khandelwal, A. Lang, F. Zong Schroffenegger, U. Wampfler, S. Lendl, M. Schwarz, R. P. Murgas, F. Palle, E. Parviainen, H. |
| contents | We report two warm Earth-sized exoplanets orbiting the close binary TOI-2267 (M5+M6, separation ~8 au). Data from TESS and ground-based facilities confirm the planets, but we cannot determine which star they orbit. The planets have radii of 1.00+/-0.11 R_Earth (TOI-2267 b, P=2.28 d) and 1.14+/-0.13 R_Earth (TOI-2267 c, P=3.49 d) if around TOI-2267A, or 1.22+/-0.29 R_Earth and 1.36+/-0.33 R_Earth if around TOI-2267B. TESS also shows a candidate signal (TOI-2267.02, P=2.03 d, 0.95+/-0.12 or 1.13+/-0.30 R_Earth). Dynamical analysis shows all three cannot orbit one star; the most stable configuration has planets b and c (near a 3:2 resonance) orbiting one star and the candidate the other. This scenario would make TOI-2267 the most compact binary system known to host planets, with both components harbouring transiting worlds, offering a unique benchmark for studying planet formation and evolution in compact binary. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_14176 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267 Zúñiga-Fernández, S. Pozuelos, F. J. Dévora-Pajares, M. Cuello, N. Greklek-McKeon, M. Stassun, K. G. Van Grootel, V. Rojas-Ayala, B. Korth, J. Günther, M. N. Burgasser, A. J. Hsu, C. Rackham, B. V. Barkaoui, K. Timmermans, M. Cadieux, C. Alonso, R. Strakhov, I. A. Howell, S. B. Littlefield, C. Furlan, E. Amado, P. J. Jenkins, J. M. Twicken, J. D. Sucerquia, M. Davis, Y. T. Schanche, N. Collins, K. A. Burdanov, A. Davoudi, F. Demory, B. -O. Delrez, L. Dransfield, G. Ducrot, E. Garcia, L. J. Gillon, M. Chew, Y. Gómez Maqueo Muñoz, C. Janó Jehin, E. Murray, C. A. Niraula, P. Pedersen, P. P. Queloz, D. Rebolo-López, R. Scott, M. G. Sebastian, D. Hooton, M. J. Thompson, S. J. Triaud, A. H. M. J. de Wit, J. Ghachoui, M. Benkhaldoun, Z. Doyon, R. Lafrenière, D. Casanova, V. Sota, A. Plauchu-Frayn, I. Khandelwal, A. Lang, F. Zong Schroffenegger, U. Wampfler, S. Lendl, M. Schwarz, R. P. Murgas, F. Palle, E. Parviainen, H. Earth and Planetary Astrophysics Solar and Stellar Astrophysics We report two warm Earth-sized exoplanets orbiting the close binary TOI-2267 (M5+M6, separation ~8 au). Data from TESS and ground-based facilities confirm the planets, but we cannot determine which star they orbit. The planets have radii of 1.00+/-0.11 R_Earth (TOI-2267 b, P=2.28 d) and 1.14+/-0.13 R_Earth (TOI-2267 c, P=3.49 d) if around TOI-2267A, or 1.22+/-0.29 R_Earth and 1.36+/-0.33 R_Earth if around TOI-2267B. TESS also shows a candidate signal (TOI-2267.02, P=2.03 d, 0.95+/-0.12 or 1.13+/-0.30 R_Earth). Dynamical analysis shows all three cannot orbit one star; the most stable configuration has planets b and c (near a 3:2 resonance) orbiting one star and the candidate the other. This scenario would make TOI-2267 the most compact binary system known to host planets, with both components harbouring transiting worlds, offering a unique benchmark for studying planet formation and evolution in compact binary. |
| title | Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267 |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2508.14176 |