# # Program information file # PROGRAM_ID 2022B098 PROGRAM_TITLE NIR Radial Velocity Follow Up of Exoplanet Candidates Orbiting Young Stars PROGRAM_INV1 Claire Geneser PROGRAM_INV2 Angelle Tanner PROGRAM_INV3 Peter Plavchan PROGRAM_INV4 Bryson Cale PROGRAM_INV5 Farzaneh Zohrabi PROGRAM_SCICAT extra-solar planets PROGRAM_ABSTRACT_BEG This project intends to use iSHELL to obtain precise radial-velocity [PRV] measurements of a young transiting exoplanet candidate discovered with TESS. When added to the growing sample of all known exoplanets, these measurements allow us to study the demographics, formation and evolution of planetary systems as a function of stellar age, orbital period, and host star spectral type. This program will leverage the power of multi-wavelength PRVs by combining measurements taken with iSHELL in the infrared and other telescopes including MAROON-X/Gemini and/or NEID/WIYN at optical wavelengths. Combining optical and infrared PRVs from multiple instruments not only improves the SNR of the planetary detection due to more data points, but also allows for the robust modeling of the impact of stellar activity via a Gaussian Process model and the natural color-dependence of this phenomenon. The goal of these observations will be to 1] confirm the planet candidate, 2] strengthen the estimates for the planet with <5 sigma masses, and 3] refine the estimates of the orbital properties such at eccentricity, and 4] search for additional non-transiting planets. Creating a complete sample of fully characterized young planetary systems over a wide range of stellar properties and planetary configurations, will lead to a more thorough understanding of the evolution and formation of all planetary systems both young and old. PROGRAM_ABSTRACT_END