From Misaligned Sub-Saturns to Aligned Brown Dwarfs: The Highest $M_{\mathrm{p}}/M{}_{\ast }$ Systems Exhibit Low Obliquities, Even around Hot Stars

Jace Rusznak, Xian-Yu Wang, Malena Rice +1

We present a pattern emerging from stellar obliquity measurements in single-star systems: planets with high planet-to-star mass ratios ($M_{\mathrm{p}}/M{}_{\ast }$$>$ $2\times 10^{-3}$) -- su…