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Table · dataset · 2026

TESS-Keck Survey. XXIV. 47 distant giants RVs

Listed in IVOA Registry (Virtual Observatory)

We present the results of the Distant Giants Survey, a 3yr radial velocity (RV) campaign to search for wide-separation giant planets orbiting Sun-like stars known to host an inner transiting planet.

Description

We defined a distant giant (DG) to have a=1-10AU and M_p_sin(i)=70-4000M_{Earth}_=0.2-12.5M_J_, and required transiting planets to have a<1AU and R_p_=1-4R_{Earth}_. We assembled our sample of 47 stars using a single selection function and observed each star at monthly intervals to obtain ~30RV 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.

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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.

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Infrared · Optical
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Astronomical sciences 74%
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concepts[modality].ivoa_waveband:opticalsource · IVOA Registryconnector:ivoa_registry@1.0.0
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