A super-Earth and a sub-Neptune orbiting the bright, quiet M3 dwarf TOI-1266
Article
Article Title | A super-Earth and a sub-Neptune orbiting the bright, quiet M3 dwarf TOI-1266 |
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ERA Journal ID | 1050 |
Article Category | Article |
Authors | Demory, B. -O. (Author), Pozuelos, F. J. (Author), Chew, Y. Gomez Maqueo (Author), Sabin, L. (Author), Petrucci, R. (Author), Schroffenegger, U. (Author), Grimm, S. L. (Author), Sestovic, M. (Author), Gillon, M. (Author), McCormac, J. (Author), Barkaoui, K. (Author), Benz, W. (Author), Bieryla, A. (Author), Bouchy, F. (Author), Burdanov, A. (Author), Collins, K. A. (Author), de Wit, J. (Author), Dressing, C. D. (Author), Garcia, L. J. (Author), Giacalone, S. (Author), Guerra, P. (Author), Haldemann, J. (Author), Heng, K. (Author), Jehin, E. (Author), Jofre, E. (Author), Kane, S. R. (Author), Lillo-Box, J. (Author), Maigne, V. (Author), Mordasini, C. (Author), Morris, B. M. (Author), Niraula, P. (Author), Queloz, D. (Author), Rackham, B. V. (Author), Savel, A. B. (Author), Soubkiou, A. (Author), Srdoc, G. (Author), Stassun, K. G. (Author), Triaud, A. H. M. J. (Author), Zambelli, R. (Author), Ricker, G. (Author), Latham, D. W. (Author), Seager, S. (Author), Winn, J. N. (Author), Jenkins, J. M. (Author), Calvario-Velasquez, T. (Author), Franco Herrera, J. A. (Author), Colorado, E. (Author), Cadena Zepeda, E. O. (Author), Figueroa, L. (Author), Watson, A. M. (Author), Lugo-Ibarra, E. E. (Author), Carigi, L. (Author), Guisa, G. (Author), Herrera, J. (Author), Sierra Diaz, G. (Author), Suarez, J. C. (Author), Barrado, D. (Author), Batalha, N. M. (Author), Benkhaldoun, Z. (Author), Chontos, A. (Author), Dai, F. (Author), Essack, Z. (Author), Ghachoui, M. (Author), Huang, C. X. (Author), Huber, D. (Author), Isaacson, H. (Author), Lissauer, J. J. (Author), Morales-Calderon, M. (Author), Robertson, P. (Author), Roy, A. (Author), Twicken, J. D. (Author), Vanderburg, A. (Author) and Weiss, L. M. (Author) |
Journal Title | Astronomy and Astrophysics: a European journal |
Journal Citation | 642, pp. 1-21 |
Article Number | A49 |
Number of Pages | 21 |
Year | 2020 |
Publisher | EDP Sciences |
Place of Publication | France |
ISSN | 0004-6361 |
1432-0746 | |
Digital Object Identifier (DOI) | https://doi.org/10.1051/0004-6361/202038616 |
Web Address (URL) | https://www.aanda.org/articles/aa/full_html/2020/10/aa38616-20/aa38616-20.html |
Abstract | We report the discovery and characterisation of a super-Earth and a sub-Neptune transiting the bright (K = 8.8), quiet, and nearby (37 pc) M3V dwarf TOI-1266. We validate the planetary nature of TOI-1266 b and c using four sectors of TESS photometry and data from the newly-commissioned 1-m SAINT-EX telescope located in San Pedro Mártir (México). We also include additional ground-based follow-up photometry as well as high-resolution spectroscopy and high-angular imaging observations. The inner, larger planet has a radius of R = 2.37-0.12+0.16 R and an orbital period of 10.9 days. The outer, smaller planet has a radius of R = 1.56-0.13+0.15 R on an 18.8-day orbit. The data are found to be consistent with circular, co-planar and stable orbits that are weakly influenced by the 2:1 mean motion resonance. Our TTV analysis of the combined dataset enables model-independent constraints on the masses and eccentricities of the planets. We find planetary masses of Mp = 13.5-9.0+11.0 M (<36.8 M at 2-σ) for TOI-1266 b and 2.2-1.5+2.0 M (<5.7 M at 2-σ) for TOI-1266 c. We find small but non-zero orbital eccentricities of 0.09-0.05+0.06 (<0.21 at 2-σ) for TOI-1266 b and 0.04 ± 0.03 (< 0.10 at 2-σ) for TOI-1266 c. The equilibrium temperatures of both planets are of 413 ± 20 and 344 ± 16 K, respectively, assuming a null Bond albedo and uniform heat redistribution from the day-side to the night-side hemisphere. The host brightness and negligible activity combined with the planetary system architecture and favourable planet-to-star radii ratios makes TOI-1266 an exquisite system for a detailed characterisation. |
Keywords | Instrumentation: detectors; Planets and satellites: detection; Astrophysics - Earth and Planetary Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | University of Bern, Switzerland |
University of Liege, Belgium | |
University of Buenos Aires, Argentina | |
National Autonomous University of Mexico, Mexico | |
University of Warwick, United Kingdom | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Geneva, Switzerland | |
Massachusetts Institute of Technology, United States | |
University of California, United States | |
Albanya Observatory, Spain | |
Astrobiology Center, Spain | |
University of Cambridge, United Kingdom | |
Cadi Ayyad University, Morocco | |
Kotizarovci Observatory, Croatia | |
Vanderbilt University, United States | |
University of Birmingham, United Kingdom | |
Lunae Astronomical Society, Italy | |
Harvard-Smithsonian Centre for Astrophysics, United States | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
University of Granada, Spain | |
University of Hawaii, United States | |
California Institute of Technology (Caltech), United States | |
Centre for Astrophysics | |
Spanish Astrobiology Centre, Spain | |
University of Texas at Austin, United States |
https://research.usq.edu.au/item/q7262/a-super-earth-and-a-sub-neptune-orbiting-the-bright-quiet-m3-dwarf-toi-1266
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