SIMBAD references

TOI-282 is a bright (V = 9.38) F8 main-sequence star known to host three transiting long-period (P_b = 22.9 d, P_c = 56.0 d, and P_d = 84.3 d) small (R_p ≈ 2-4 R_⊕) planets. The orbital period ratio of the two outermost planets, namely TOI-282 c and d, is close to the 3:2 commensurability, suggesting that the planets might be trapped in a mean motion resonance. We combined space-borne photometry from the TESS telescope with high-precision HARPS and ESPRESSO Doppler measurements to refine orbital parameters, measure the planetary masses, and investigate the architecture and evolution of the system. We performed a Markov chain Monte Carlo joint analysis of the transit light curves and radial velocity time series, and carried out a dynamical analysis to model transit timing variations and Doppler measurements along with N-body integration. In agreement with previous results, we found that TOI-282 b, c, and d have radii of R_b = 2.69 ± 0.23 R_⊕, R_c = 4.13_–0.14^+0.16R_⊕, and R_d = 3.11 ± 0.15 R_⊕, respectively. We measured planetary masses of M_b = 6.2 ± 1.6 M_⊕, M_c = 9.2 ± 2.0 M_⊕, and M_d = 5.8_–1.1^+0.9M_⊕, which imply mean densities of ρ_b = 1.8_–0.6^+0.7 g cm^–3, ρ_c = 0.7 ± 0.2 g cm^–3, and ρ_d = 1.1_–0.2+0.3 g cm^–3, respectively. The three planets may be water worlds, making TOI-282 an interesting system for future atmospheric follow-up observations with JWST and ELT.