Tootfinder

An Aligned Sub-Neptune Revealed with MAROON-X and a Tendency Towards Alignment for Small Planets
Alex S. Polanski, Ian J. M. Crossfield, Andreas Seifahrt, Jacob L. Bean, Jonathan Brande, Karen A. Collins, David R. Coria, Akihiko Fukui, Norio Narita, Julian St\"urmer, Steven Giacalone, David Kasper
https://arxiv.org/abs/2507…

An Aligned Sub-Neptune Revealed with MAROON-X and a Tendency Towards Alignment for Small Planets
We present the Rossiter-McLaughlin measurement of the sub-Neptune TOI-1759A b with MAROON-X. A joint analysis with MuSCAT3 photometry and nine additional TESS transits produces a sky-projected obliquity of $|λ|$= $4^\circ\pm18^{\circ}$. We also derive a true obliquity of $ψ$=24$\pm12^{\circ}$ making this planet consistent with full alignment albeit to $<1σ$. With a period of 18.85 days and an $a/R_{*}$ of 40, TOI-1759A b is the longest period single sub-Neptune to have a measured o…