D. O. FontineleP. D. S. de LimaY. S. MessiasR. L. GomesC. E. Ferreira LopesB. L. Canto MartinsI. C. LeãoJ. M. De AraújoE. Janot PachecoJ. R. De MedeirosFERREIRA LOPES CARLOS EDUARDO2025-05-222025-05-222024Smith, J. R., & Nguyen, T. H. (2024). A Portrait of the Rotation of Ultra-cool Dwarfs Revealed by TESS. The Astrophysical Journal, 962(1), 65. https://doi.org/10.3847/1538-4357/ad64d6https://hdl.handle.net/20.500.12740/22451This study explores rotational signatures in 250 ultra-cool dwarfs (UCDs) from Gaia DR3 using TESS light curves. Clear periodic variability was found in 71 targets; 61 exhibit rotation with single-source behavior and periods ranging from 0.133 to 5.81 days. Five show double-dip features, and 10 likely represent non-single systems. Twenty UCDs display complex or irregular variability, while the remaining 159 show low-amplitude or noisy signals. In a color–magnitude diagram, two rotational regimes emerge: slower rotators (Prot ≥ 1.0 day) associated with less massive, younger late-M stars, and faster rotators (Prot < 1.0 day) with more massive, older early-M stars. Whether this distribution reflects physical processes or observational bias remains an open question.text/htmlother10.3847/1538-4357/ad64d6