S21B0113
S21B0113
Young planets are ideal targets to test planet formation and evolution scenarios since they are likely to preserve the primordial information before being affected by post processes (e.g., photoevaporation). Comparing the distribution and properties of exoplanets as a function of age allows us to gain insight into the true physical processes and their timescales. For young stars, however, there are only a handful of exoplanets whose radii and masses were both constrained in the past due to high radial-velocity (RV) jitters and rotation velocities. Here, we propose the systematic observations of young transiting-planet hosting stars with precise RV measurements in the near IR, using IRD. In the near IR, RV jitters are suppressed by a factor of β 3 compared to RV measurements in the visible, enabling us to measure accurate masses of planets around young stars. IRDβs broadband spectroscopy (covering Y, J, H bands simultaneously) also provides a unique opportunity to disentangle RV jitters from true planetary signals by investigating the activity indicators in the near IR (e.g., neutral K I doublet at 1240 nm and 1250 nm). With this campaign, we attempt to obtain tight constraints on masses of transiting planets around three young stars, covering a wide range of system ages.
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