학술논문
A super-Earth and a sub-Neptune orbiting the bright, quiet M3 dwarf TOI-1266
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article
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Demory, B-O; Pozuelos, FJ; Chew, Y Gómez Maqueo; Sabin, L; Petrucci, R; Schroffenegger, U; Grimm, SL; Sestovic, M; Gillon, M; McCormac, J; Barkaoui, K; Benz, W; Bieryla, A; Bouchy, F; Burdanov, A; Collins, KA; de Wit, J; Dressing, CD; Garcia, LJ; Giacalone, S; Guerra, P; Haldemann, J; Heng, K; Jehin, E; Jofré, E; Kane, SR; Lillo-Box, J; Maigné, V; Mordasini, C; Morris, BM; Niraula, P; Queloz, D; Rackham, BV; Savel, AB; Soubkiou, A; Srdoc, G; Stassun, KG; Triaud, AHMJ; Zambelli, R; Ricker, G; Latham, DW; Seager, S; Winn, JN; Jenkins, JM; Calvario-Velásquez, T; Herrera, JA Franco; Colorado, E; Zepeda, EO Cadena; Figueroa, L; Watson, AM; Lugo-Ibarra, EE; Carigi, L; Guisa, G; Herrera, J; Díaz, G Sierra; Suárez, JC; Barrado, D; Batalha, NM; Benkhaldoun, Z; Chontos, A; Dai, F; Essack, Z; Ghachoui, M; Huang, CX; Huber, D; Isaacson, H; Lissauer, JJ; Morales-Calderón, M; Robertson, P; Roy, A; Twicken, JD; Vanderburg, A; Weiss, LM
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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 (