Exoplanets in the Galactic context: Planet occurrence rates in the thin disk, thick disk and stellar halo of Kepler stars
arXiv:2112.03927 · doi:10.1093/mnras/stab3596
Abstract
In order to gain a better understanding of planet formation and evolution, it is important to examine the statistics of exoplanets in the Galactic context. By combining information on stellar elemental abundances and kinematics, we constructed separate samples of Kepler stars according to their affiliation to the Galactic components of thin disk, thick disk and stellar halo. Using a Bayesian analysis with conjugate priors, we then investigated how planet occurrence rates differ in different regions of planet properties. We find that young, slow and metal-rich stars, associated mainly with the thin disk, host on average more planets (especially close-in super Earths) compared to the old, fast and metal-poor thick disk stars. We further assess the dependence between stellar properties such as spectral type and metallicity, and planet occurrence rates. The trends we find agree with those found by other authors as well. We argue that in the Galactic context, these are probably not the main properties that affect planet occurrence rates, but rather the dynamical history of stars, and especially stellar age and kinematics, impact the current distribution of planets in the Galaxy.
arXiv comment11 pages, 7 figures, accepted for publication in MNRAS
References in corpus (54)
- Gaia Data Release 2. Summary of the contents and survey properties
- The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
- The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
- The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
- Gaia Early Data Release 3: The astrometric solution
- Planet Occurrence within 0.25 AU of Solar-type Stars from Kepler
- Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
- Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
- Co-formation of the Galactic disc and the stellar halo
- Elemental Abundance Survey of The Galactic Thick Disk
- Two distinct halo populations in the solar neighborhood. Evidence from stellar abundance ratios and kinematics
- Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25
- The GALAH Survey: Second Data Release
- Terrestrial Planet Occurrence Rates for the Kepler GK Dwarf Sample
- The California-Kepler Survey. IV. Metal-rich Stars Host a Greater Diversity of Planets
- The California-Kepler Survey. I. High Resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets
- Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run
- Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates
- The Derivation, Properties and Value of Kepler's Combined Differential Photometric Precision
- About 30% of Sun-like Stars Have Kepler-like Planetary Systems: A Study of their Intrinsic Architecture
- The Exoplanet Population Observation Simulator. I - The Inner Edges of Planetary Systems
- An Increase in the Mass of Planetary Systems around Lower-Mass Stars
- Abundance Estimates for 16 Elements in 6 Million Stars from LAMOST DR5 Low-Resolution Spectra
- Occurrence Rates of Planets orbiting FGK Stars: Combining Kepler DR25, Gaia DR2 and Bayesian Inference
- Planetary System Disruption by Galactic Perturbations to Wide Binary Stars
- Mapping the Stellar Halo with the H3 Spectroscopic Survey
- Architectures of Exoplanetary Systems. I: A Clustered Forward Model for Exoplanetary Systems around Kepler's FGK Stars
- Searching the Entirety of Kepler Data. II. Occurrence Rate Estimates for FGK Stars
- Overabundance of alpha-elements in exoplanet host stars
- An image of the dust sublimation region in the nucleus of NGC 1068
- PLATO as it is: a legacy mission for Galactic archaeology
- Constraining planet structure and composition from stellar chemistry: trends in different stellar populations
- Stellar clustering shapes the architectures of planetary systems
- The effects of external planets on inner systems: multiplicities, inclinations, and pathways to eccentric warm Jupiters
- On the correlation between metallicity and the presence of giant planets
- Occurrence and Architecture of Kepler Planetary Systems as Functions of Stellar Mass and Effective Temperature
- Improving the Accuracy of Planet Occurrence Rates from Kepler using Approximate Bayesian Computation
- Kinematics of planet-host stars and their relation with dynamical streams in the solar neighbourhood
- The TESS-Keck Survey II: An Ultra-Short Period Rocky Planet and its Siblings Transiting the Galactic Thick-Disk Star TOI-561
- The Exoplanet Population Observation Simulator. II -- Population Synthesis in the Era of Kepler
- Planets Across Space and Time (PAST). I. Characterizing the Memberships of Galactic Components and Stellar Ages: Revisiting the Kinematic Methods and Applying to Planet Host Stars
- Influence of Stellar Metallicity on Occurrence Rates of Planets and Planetary Systems
- Architectures of Exoplanetary Systems. II: An Increase in Inner Planetary System Occurrence Toward Later Spectral Types for Kepler's FGK Dwarfs
- LHS 1815b: The First Thick-Disk Planet Detected By TESS
- An Increase in Small-planet Occurrence with Metallicity for Late-type Dwarf Stars in the Kepler Field and Its Implications for Planet Formation
- On the stellar clustering and architecture of planetary systems
- Small Planets in the Galactic Context: Host Star Kinematics, Iron, and Element Enhancement
- Searching For Transiting Planets Around Halo Stars. II. Constraining the Occurrence Rate of Hot Jupiters
- Occurrence rates of small planets from HARPS: Focus on the Galactic context
- Variations in -element ratios trace the chemical evolution of the disk
- Planet Occurrence Rate Correlated to Stellar Dynamical History: Evidence from Kepler and Gaia
- Scaling K2. III. Comparable Planet Occurrence in the FGK Samples of Campaign 5 and Kepler
- Planetary mass-radius relations across the galaxy
- Quantifying the Similarity of Planetary System Architectures
Cited by in corpus (15)
- Ariel stellar characterisation: I -- homogeneous stellar parameters of 187 FGK planet host stars Description and validation of the method
- How the origin of stars in the Galaxy impacts the composition of planetary building blocks
- Planet formation throughout the Milky Way: Planet populations in the context of Galactic chemical evolution
- Probable Dormant Neutron Star in a Short-Period Binary System
- Chemical Composition Of Bright Stars In The Northern Hemisphere: Star-Planet Connection
- Which stars can form planets: Planetesimal formation at low metallicities
- Age distribution of exoplanet host stars: Chemical and Kinematics age proxies from GAIA DR3
- Exoplanets Across Galactic Stellar Populations with PLATO: Estimating Exoplanet Yields Around FGK Stars for the Thin Disk, Thick Disk and Stellar Halo
- Populating The Milky Way: Characterising Planet Demographics by Combining Galaxy Formation Simulations and Planet Population Synthesis Models
- Ariel stellar characterisation III. Fast rotators and new FGK stars in the Ariel Mission Candidate Sample
- Exoplanet Occurrence Rate with Age for FGK Stars in Kepler
- A Close-in Planet Orbiting Giant Star HD 167768
- A Bayesian Monte Carlo assessment of orbital stability in the late stages of planetary system formation
- On the Ordering of Exoplanet Systems
- Modelling the Milky Way's exoplanet population based on cosmological galaxy simulations