The TESS-Keck Survey: Science Goals and Target Selection

Abstract

Space-based transit missions such as Kepler and TESS have demonstrated that planets are ubiquitous. However, the success of these missions heavily depends on ground-based radial velocity (RV) surveys, which combined with transit photometry can yield bulk densities and orbital properties. While most Kepler host stars are too faint for detailed follow-up observations, TESS is detecting planets orbiting nearby bright stars that are more amenable to RV characterization. Here we introduce the TESS-Keck Survey (TKS), an RV program using ~100 nights on Keck/HIRES to study exoplanets identified by TESS. The primary survey aims are investigating the link between stellar properties and the compositions of small planets; studying how the diversity of system architectures depends on dynamical configurations or planet multiplicity; identifying prime candidates for atmospheric studies with JWST; and understanding the role of stellar evolution in shaping planetary systems. We present a fully-automated target selection algorithm, which yielded 103 planets in 86 systems for the final TKS sample. Most TKS hosts are inactive, solar-like, main-sequence stars (4500 K < Teff < 6000 K) at a wide range of metallicities. The selected TKS sample contains 71 small planets (Rp < 4 Re), 11 systems with multiple transiting candidates, 6 sub-day period planets and 3 planets that are in or near the habitable zone of their host star. The target selection described here will facilitate the comparison of measured planet masses, densities, and eccentricities to predictions from planet population models. Our target selection software is publicly available (at https://github.com/ashleychontos/sort-a-survey) and can be adapted for any survey which requires a balance of multiple science interests within a given telescope allocation.

arXiv comment23 pages, 10 figures, 5 tables

References in corpus (90)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• The Transiting Exoplanet Survey Satellite
• The James Webb Space Telescope
• The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• Planet Occurrence within 0.25 AU of Solar-type Stars from Kepler
• The false positive rate of Kepler and the occurrence of planets
• Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data
• Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data
• Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
• The Revised TESS Input Catalog and Candidate Target List
• Prevalence of Earth-size planets orbiting Sun-like stars
• Kepler Presearch Data Conditioning I - Architecture and Algorithms for Error Correction in Kepler Light Curves
• Kepler planets: a tale of evaporation
• Most 1.6 Earth-Radius Planets are not Rocky
• The evaporation valley in the Kepler planets
• Gaia Data Release 2: Photometric content and validation
• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• A Framework for Prioritizing the TESS Planetary Candidates Most Amenable to Atmospheric Characterization
• The Mass-Radius Relation for 65 Exoplanets Smaller than 4 Earth Radii
• KEPLER's First Rocky Planet: Kepler-10b
• The California Kepler Survey VII. Precise Planet Radii Leveraging Gaia DR2 Reveal the Stellar Mass Dependence of the Planet Radius Gap
• Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search
• Core-powered mass loss and the radius distribution of small exoplanets
• Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
• Secular Chaos and the Production of Hot Jupiters
• Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25
• Sculpting the Valley in the Radius Distribution of Small Exoplanets as a by-product of Planet Formation: The Core-Powered Mass-Loss Mechanism
• The TESS Objects of Interest Catalog from the TESS Prime Mission
• The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
• Unresolved stellar companions with Gaia DR2 astrometry
• Characteristics of Kepler Planetary Candidates Based on the First Data Set: The Majority are Found to be Neptune-Size and Smaller
• A Framework for Quantifying the Degeneracies of Exoplanet Interior Compositions
• Kepler Data Validation I -- Architecture, Diagnostic Tests, and Data Products for Vetting Transiting Planet Candidates
• Revised Radii of Kepler Stars and Planets Using Gaia Data Release 2
• Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library
• Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities
• Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
• Hot super-Earths stripped by their host stars
• Planetary Candidates Observed by Kepler VI: Planet Sample from Q1-Q16 (47 Months)
• The orbital eccentricity of small planet systems
• Kepler Data Validation II -- Transit Model Fitting and Multiple-Planet Search
• SOAR TESS Survey. I: Sculpting of TESS planetary systems by stellar companions
• Planetary Candidates Observed by Kepler. VII. The First Fully Uniform Catalog Based on The Entire 48 Month Dataset (Q1-Q17 DR24)
• Planetary Candidates Observed by Kepler IV: Planet Sample From Q1-Q8 (22 Months)
• Hot Jupiters and Cool Stars
• Overstable Librations can account for the Paucity of Mean Motion Resonances among Exoplanet Pairs
• TESS Discovery of a Transiting Super-Earth in the $\pi$ Mensae System
• Signatures of the Core-Powered Mass-Loss Mechanism in the Exoplanet Population: Dependence on Stellar Properties and Observational Predictions
• Planetary Candidates Observed by Kepler V: Planet Sample from Q1-Q12 (36 Months)
• Disentangling stellar activity and planetary signals
• The extreme physical properties of the CoRoT-7b super-Earth
• Predicting the detectability of oscillations in solar-type stars observed by Kepler
• The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
• Trends in Atmospheric Properties of Neptune-Size Exoplanets
• A remnant planetary core in the hot-Neptune desert
• The Precision of Mass Measurements Required for Robust Atmospheric Characterization of Transiting Exoplanets
• Kepler-21b: A rocky planet around a V = 8.25 magnitude star
• A hot Jupiter orbiting the 1.7 Msun Subgiant HD102956
• A pair of TESS planets spanning the radius valley around the nearby mid-M dwarf LTT 3780
• A Hot Saturn Orbiting An Oscillating Late Subgiant Discovered by TESS
• Planetary population synthesis
• Detection of Stars within $\sim$0.8 arcseconds of Kepler Objects of Interest
• Formation and Evolution of Planetary Systems in Presence of Highly Inclined Stellar Perturbers
• Testing exoplanet evaporation with multi-transiting systems
• The Asteroseismic Target List (ATL) for solar-like oscillators observed in 2-minute cadence with the Transiting Exoplanet Survey Satellite (TESS)
• An unusually low density ultra-short period super-Earth and three mini-Neptunes around the old star TOI-561
• The TESS-Keck Survey IV: A Retrograde, Polar Orbit for the Ultra-Low-Density, Hot Super-Neptune WASP-107b
• Astrophysical Insights into Radial Velocity Jitter from an Analysis of 600 Planet-search Stars
• TOI-257b (HD 19916b): A Warm sub-Saturn Orbiting an Evolved F-type Star
• A well aligned orbit for the 45 Myr old transiting Neptune DS Tuc Ab
• The Exoplanet Population Observation Simulator. II -- Population Synthesis in the Era of Kepler
• The TESS-Keck Survey II: An Ultra-Short Period Rocky Planet and its Siblings Transiting the Galactic Thick-Disk Star TOI-561
• The CARMENES search for exoplanets around M dwarfs -- LP 714-47b (TOI 442.01): Populating the Neptune desert
• Do close-in giant planets orbiting evolved stars prefer eccentric orbits?
• The TESS-Keck Survey I: A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras
• Retired A Stars: The Effect of Stellar Evolution on the Mass Estimates of Subgiants
• TKS X: Confirmation of TOI-1444b and a Comparative Analysis of the Ultra-short-period Planets with Hot Neptunes
• A Novel Method to Photometrically Constrain Orbital Eccentricities: Multibody Asterodensity Profiling (MAP)
• The Magellan-TESS Survey I: Survey Description and Mid-Survey Results
• Precise Radial Velocities of 2046 Nearby FGKM Stars and 131 Standards
• TESS-Keck Survey IX: Masses of Three Sub-Neptunes Orbiting HD 191939 and the Discovery of a Warm Jovian Plus a Distant Sub-Stellar Companion
• Predicting radial-velocity jitter induced by stellar oscillations based on Kepler data
• The Curious Case of KOI 4: Confirming Kepler's First Exoplanet
• Retired A Stars and Their Companions VIII: 15 New Planetary Signals Around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts
• TKS III: A Stellar Obliquity Measurement of TOI-1726 c
• TKS V. Twin sub-Neptunes Transiting the Nearby G Star HD 63935
• The TESS-Keck Survey. VI. Two Eccentric sub-Neptunes Orbiting HIP-97166
• TESS Asteroseismology of $\alpha$ Mensae: Benchmark Ages for a G7 Dwarf and its M-dwarf Companion

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• TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
• The Kepler Giant Planet Search. I: A Decade of Kepler Planet-host Radial Velocities from W. M. Keck Observatory
• The TESS-Keck Survey XX: 15 New TESS Planets and a Uniform RV Analysis of all Survey Targets
• The Ariel Target List: The Impact of TESS and the Potential for Characterising Multiple Planets Within a System
• TOI-561 b: A Low Density Ultra-Short Period "Rocky" Planet around a Metal-Poor Star
• TESS-Keck Survey IX: Masses of Three Sub-Neptunes Orbiting HD 191939 and the Discovery of a Warm Jovian Plus a Distant Sub-Stellar Companion
• The TESS-Keck Survey. XV. Precise Properties of 108 TESS Planets and Their Host Stars
• RVSPY -- Radial Velocity Survey for Planets around Young Stars. Target characterization and high-cadence survey
• The GAPS Programme at TNG XL: A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422
• TOI-1801 b: A temperate mini-Neptune around a young M0.5 dwarf
• TESS-Keck Survey XIV: Two giant exoplanets from the Distant Giants Survey
• TESS Giants Transiting Giants. VI. Newly Discovered Hot Jupiters Provide Evidence for Efficient Obliquity Damping after the Main Sequence
• Refractory and Volatile Species in the UV-to-IR Transmission Spectrum of Ultra-hot Jupiter WASP-178b with HST and JWST
• Characterisation of TOI-406 as showcase of the THIRSTEE program: A 2-planet system straddling the M-dwarf density gap
• Fundamental effective temperature measurements for eclipsing binary stars -- IV. Selection of new benchmark stars and first results for HD 22064
• The TESS-Keck Survey. XIII. An Eccentric Hot Neptune with a Similar-Mass Outer Companion around TOI-1272
• The GAPS Programme at TNG. LXV. Precise density measurement of TOI-1430 b, a young planet with an evaporating atmosphere
• The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn Mass Planet and a non-Transiting Saturn Mass Planet Orbiting a Solar Analog
• Detection of periodic transit timing variations in warm sub-Saturn HD 332231 b