The TESS-Keck Survey. XXIV. Outer Giants May Be More Prevalent in the Presence of Inner Small Planets
Article
Article Title | The TESS-Keck Survey. XXIV. Outer Giants May Be More Prevalent in the Presence of Inner Small Planets |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Van Zandt, Judah, Petigura, Erik A., Lubin, Jack, Weiss, Lauren M., Turtelboom, Emma V., Fetherolf, Tara, Akana Murphy, Joseph M., Crossfield, Ian J. M., Gilbert, Gregory J., Mocnik, Teo, Batalha, Natalie M., Dressing, Courtney, Fulton, Benjamin, Howard, Andrew W., Huber, Daniel, Isaacson, Howard, Kane, Stephen R., Robertson, Paul, Roy, Arpita, Angelo, Isabel, Behmard, Aida, Beard, Corey, Chontos, Ashley, Dai, Fei, Giacalone, Steven, Hill, Michelle L., Holcomb, Rae, Howell, Steve B., Mayo, Andrew W., Pidhorodetska, Daria, Polanski, Alex S., Rogers, James, Rosenthal, Lee J., Rubenzahl, Ryan A., Scarsdale, Nicholas, Tyler, Dakotah, Yee, Samuel W. and Zink, Jon |
Journal Title | The Astronomical Journal |
Journal Citation | 169 (5) |
Article Number | 235 |
Number of Pages | 26 |
Year | 2025 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/adbbed |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/adbbed |
Abstract | We present the results of the Distant Giants Survey, a 3 yr radial velocity (RV) campaign to search for wideseparation giant planets orbiting Sun-like stars known to host an inner transiting planet. We defined a distant giant (DG) to have a = 1–10 au and M i p sin = 70–4000 M⊕ = 0.2–12.5 MJ, and required transiting planets to have a < 1 au and Rp = 1–4 R⊕. We assembled our sample of 47 stars using a single selection function and observed each star at monthly intervals to obtain ≈30 RV observations per target. The final catalog includes a total of 12 distant companions: four giant planets detected during our survey, two previously known giant planets, and six objects of uncertain disposition identified through RV/astrometric accelerations. Statistically, half of the uncertain objects are planets and the remainder are stars/brown dwarfs. We calculated target-by-target completeness maps to account for missed planets. We found evidence for a moderate enhancement of DGs in the presence of close-in small planets (CSs), P(DG|CS) =31 11 12 - + %, over the field rate of P(DG) =16 %2 2 - + . No enhancement is disfavored (p ∼ 8%). In contrast to a previous study, we found no evidence that stellar metallicity raises the enhancement of P(DG|CS) over P(DG). We found evidence that DG companions preferentially accompany shorter-period CS planets and have lower eccentricities than randomly selected giant planets. This points toward a nuanced picture of dynamically cool formation in which giants interact with, but do not disrupt, their inner systems. |
Keywords | Exoplanet detection methods ; Bayesian statistics; Exoplanet astronomy; Radial velocity |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | University of California Los Angeles, United States |
University of Notre Dame, United States | |
University of California Berkeley, United States | |
University of California Riverside, United Sates | |
University of California Santa Cruz, United States | |
University of Kansas, United States | |
Gemini Observatory, United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
NASA Exoplanet Science Institute, United States | |
California Institute of Technology (Caltech), United States | |
University of Hawaii, United States | |
University of Sydney | |
Centre for Astrophysics | |
University of California Irvine, United States | |
Space Telescope Science Institute, United States | |
Johns Hopkins University, United States | |
American Museum of Natural History, United States | |
Princeton University, United States | |
Flatiron Institute, United States | |
University of Toronto Mississauga, Canada | |
NASA Ames Research Center, United States |
https://research.usq.edu.au/item/zx217/the-tess-keck-survey-xxiv-outer-giants-may-be-more-prevalent-in-the-presence-of-inner-small-planets
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