TOI-1670 c, a 40 day Orbital Period Warm Jupiter in a Compact System, Is Well Aligned

Lubin, J.; Wang, X.-Y.; Rice, M.; Dong, J.; Wang, S.; Radzom, B.T.; Robertson, P.; Stefansson, G.; Alvarado-Montes, J.A.; Beard, C.; Bender, C.F.; Gupta, A.F.; Halverson, S.; Kanodia, S.; Li, D.; Lin, A.S.J.; Logsdon, S.E.; Lubar, E.; Mahadevan, S.; Ninan, J.P.; Rajagopal, J.; Roy, A.; Schwab, C.; Wright, J.T.

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Affiliation

Steward Observatory, University of Arizona

Issue Date

2023-12-07

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American Astronomical Society

Citation

Jack Lubin et al 2023 ApJL 959 L5

Journal

Astrophysical Journal Letters

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This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.

Abstract

We report the measurement of the sky-projected obliquity angle λ of the warm Jovian exoplanet TOI-1670 c via the Rossiter-McLaughlin effect. We observed the transit window during UT 2023 April 20 for 7 continuous hours with NEID on the 3.5 m WIYN Telescope at Kitt Peak National Observatory. TOI-1670 hosts a sub-Neptune (P ∼ 11 days; planet b) interior to the warm Jovian (P ∼ 40 days; planet c), which presents an opportunity to investigate the dynamics of a warm Jupiter with an inner companion. Additionally, TOI-1670 c is now among the longest-period planets to date to have its sky-projected obliquity angle measured. We find planet c is well aligned to the host star, with λ = − 0.°3 ± 2.°2. TOI-1670 c joins a growing census of aligned warm Jupiters around single stars and aligned planets in multiplanet systems. © 2023. The Author(s). Published by the American Astronomical Society.

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Open access journal

ISSN

2041-8205

DOI

10.3847/2041-8213/ad0fea

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Final Published Version

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UA Faculty Publications

© 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.

Except where otherwise noted, this item's license is described as © 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.