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- W4310879635 abstract "The evolutionary history of an extrasolar system is, in part, fossilized through its planets' orbital orientations relative to the host star's spin axis. However, spin-orbit constraints for warm Jupiters -- particularly in binary star systems, which are amenable to a wide range of dynamical processes -- are relatively scarce. We report a measurement of the Rossiter-McLaughlin effect, observed with the Keck/HIRES spectrograph, across the transit of Qatar-6 A b: a warm Jupiter orbiting one star within a binary system. From this measurement, we obtain a sky-projected spin-orbit angle $lambda={0.1pm2.6}^{circ}$. Combining this new constraint with the stellar rotational velocity of Qatar-6 A that we measure from TESS photometry, we derive a true obliquity $psi={21.82^{+8.86}_{-18.36}}^{circ}$ -- consistent with near-exact alignment. We also leverage astrometric data from Gaia DR3 to show that the Qatar-6 binary star system is edge-on ($i_{B}={90.17^{+1.07}_{-1.06}}^{circ}$), such that the stellar binary and the transiting exoplanet orbit exhibit line-of-sight orbit-orbit alignment. Ultimately, we demonstrate that all current constraints for the 3-body Qatar-6 system are consistent with both spin-orbit and orbit-orbit alignment. High-precision measurements of the projected stellar spin rate of the host star and the sky-plane geometry of the transit relative to the binary plane are required to conclusively verify the full 3D configuration of the system." @default.
- W4310879635 created "2022-12-20" @default.
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- W4310879635 date "2022-12-05" @default.
- W4310879635 modified "2023-09-27" @default.
- W4310879635 title "The Orbital Architecture of Qatar-6: A Fully Aligned 3-Body System?" @default.
- W4310879635 doi "https://doi.org/10.48550/arxiv.2212.02542" @default.
- W4310879635 hasPublicationYear "2022" @default.
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