SOYSAUCE: Stellar Obliquities of Young Systems, Atmospheres Undergoing Contraction and Escape

Standard models predict planets form aligned with the spin-axis of their host stars, preserving the angular momentum of the protoplanetary disk. However, the origin of observed misalignments—from primordial disk tilts to late-stage dynamical interactions—remains debated. The Stellar Obliquities of Young Systems, Atmospheres Undergoing Contraction and Escape (SOYSAUCE) survey targets young planets (<500 Myr) with Rossiter-McLaughlin or Doppler tomographic observations to constrain the timescale of these events. We present early results from the survey, including the youngest transiting planet (TIDYE-1b; 3 Myr) and the newly discovered 130 Myr system TIC 150070085 b. Both orbits are consistent with stellar alignment. Combined with literature results, this implies that significant misalignments likely arise on timescales of >300 Myr. We conclude by quantifying the additional sample size required to statistically differentiate between early-onset and late-stage misalignment mechanisms.