The Orbit of Warm Jupiter WASP-106 b is aligned with its Star

Abstract

Understanding orbital obliquities, or the misalignment angles between a star's rotation axis and the orbital axis of its planets, is crucial for unraveling the mechanisms of planetary formation and migration. In this study, we present an analysis of Rossiter-McLaughlin (RM) observations of the warm Jupiter exoplanet WASP-106 b. The high-precision radial velocity measurements were made with HARPS and HARPS-N during the transit of this planet. We aim to constrain the orientation of the planet's orbit relative to its host star's rotation axis. The RM observations are analyzed using a code which models the RM anomaly together with the Keplerian orbit given several parameters in combination with a Markov chain Monte Carlo implementation. We measure the projected stellar obliquity in the WASP-106 system for the first time and find $\lambda =(-1\pm 11{)}^{\circ }$, supporting the theory of quiescent migration through the disk.

12 pages, 3 figures, 4 tables, submitted to AAS

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Cited by in corpus (2)

• The Spin-Orbit Alignment of 8 Warm Gas Giant Systems
• The PFS view of TOI-677 b: A spin-orbit aligned warm Jupiter in a dynamically hot system