TESS-Keck Survey. XIV. Two Giant Exoplanets from the Distant Giants Survey

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Van_Zandt_2023_AJ_165_60.pdf (1.69 MB)

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https://iopscience.iop.org/article/10.3847/1538-3881/aca6ef

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https://doi.org/10.3847/1538-3881/aca6ef
 http://hdl.handle.net/11603/26905

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

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Author/Creator ORCID

https://orcid.org/0000-0001-7139-2724

Date

2023-01-19

Type of Work

journal articles
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Citation of Original Publication

Zandt, Judah Van, et al. "TESS-Keck Survey. XIV. Two Giant Exoplanets from the Distant Giants Survey." The Astronomical Journal 165, no. 60 (19 January2023). https://do.org/10.3847/1538-3881/aca6ef.

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

We present the Distant Giants Survey, a three-year radial velocity campaign to measure P(DG|CS), the conditional occurrence of distant giant planets (DG; Mₚ ∼ 0.3–13 Mⱼ, P > 1 yr) in systems hosting a close-in small planet (CS; Rₚ < 10 R⊕). For the past two years, we have monitored 47 Sun-like stars hosting small transiting planets detected by TESS. We present the selection criteria used to assemble our sample and report the discovery of two distant giant planets, TOI-1669 b and TOI-1694 c. For TOI-1669 b we find that M sin i = 0.573 ± 0.074 Mⱼ, P = 502 ± 16 days, and e < 0.27, while for TOI-1694 c, M sin i = 1.05 ± 0.05 Mⱼ, P = 389.2 ± 3.9 days, and e = 0.18 ± 0.05. We also confirmed the 3.8 days transiting planet TOI-1694 b by measuring a true mass of M = 26.1 ± 2.2 M⊕. At the end of the Distant Giants Survey, we will incorporate TOI-1669 b and TOI-1694 c into our calculation of P(DG|CS), a crucial statistic for understanding the relationship between outer giants and small inner companions.