Program: GS-2023A-Q-303

The evolution of low-mass, pre-main-sequence, young stellar objects, and their protoplanetary disks is dependent on multiple parameters. We want to know which stellar initial conditions produce planetary systems like ours, however, it is challenging to determine stellar parameters for YSOs. Recent work shows that temperature, surface gravity, magnetic field strength, rotation velocity, and accretion-induced veiling can be simultaneously recovered using high-resolution spectra. The infrared is critical to studying dust-obscured YSOs, and IGRINS at Gemini South provides the K-band spectra needed for parameter determination. We will observe 20 bright YSOs in Ophiuchus (some single and others in wide binaries) using band 3 conditions. We will then determine their stellar parameters and add these measurements to the IGRINS YSO Survey. These new targets are unique because some have been observed with ALMA, providing additional information on the system, and the others will allow us to study the impact of binarity on stellar evolution.