PLATOSpec's first results: planets WASP-35b and TOI-622b are on aligned orbits, and K2-237b is on a polar orbit
J. Zak, P. Kabath, H.M.J. Boffin, J. Liptak, M. Skarka, R. Brahm, P. Gajdo\v{s}, A. Bocchieri, D. Itrich, L. Vanzi, P. Pintr, J. Janik, A. Hatzes

TL;DR
This study uses the PLATOSpec instrument to measure the spin-orbit angles of three exoplanets, revealing diverse orbital alignments that inform planetary migration theories and demonstrate the instrument's capabilities.
Contribution
First spin-orbit angle measurements for TOI-622b and K2-237b, showing diverse orbital configurations and validating PLATOSpec's performance against established data.
Findings
WASP-35b has an aligned orbit with λ ≈ 1°
TOI-622b has an aligned orbit with λ ≈ -4°
K2-237b has a polar orbit with λ ≈ 91°
Abstract
The spin-orbit angle between a stellar spin axis and its planetary orbital axis is a key diagnostic of planetary migration pathways, yet the mechanisms shaping the observed spin-orbit distribution remain incompletely understood. Combining the spin-orbit angle with atmospheric measurements has emerged as a powerful method of studying exoplanets that showcases the synergy between ground- and space-based observations. We present the Rossiter-McLaughlin effect measurements of the projected spin-orbit angle () for three gaseous exoplanets using the newly commissioned PLATOSpec instrument on the E152 Telescope at La Silla Observatory. For WASP-35b, we determine deg, demonstrating PLATOSpec's capabilities through excellent agreement with HARPS-N literature data. We provide the first spin-orbit measurements for TOI-622b ( deg, true…
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