Planetary Edge Trends (PET). I. The Inner Edge-Stellar Mass Correlation
arXiv:2501.02215 · doi:10.1051/0004-6361/202553671
Abstract
The position of the innermost planet (i.e., the inner edge) in a planetary system provides important information about the relationship of the entire system to its host star properties, offering potentially valuable insights into planetary formation and evolution processes. In this work, based on the Kepler Data Release 25 (DR25) catalog combined with LAMOST and Gaia data, we investigate the correlation between stellar mass and the inner edge position across different populations of small planets in multi-planetary systems, such as super-Earths and sub-Neptunes. By correcting for the influence of stellar metallicity and analyzing the impact of observational selection effects, we confirm the trend that as stellar mass increases, the position of the inner edge shifts outward. Our results reveal a stronger correlation between the inner edge and stellar mass with a power-law index of 0.6-1.1, which is larger compared to previous studies. The stronger correlation in our findings is primarily attributed to two factors: first, the metallicity correction applied in this work enhances the correlation; second, the previous use of occurrence rates to trace the inner edge weakens the observed correlation. Through comparison between observed statistical results and current theoretical models, we find that the pre-main-sequence (PMS) dust sublimation radius of the protoplanetary disk best matches the observed inner edge stellar mass. Therefore, we conclude that the inner dust disk likely limits the innermost orbits of small planets, contrasting with the inner edges of hot Jupiters, which are associated with the magnetospheres of gas disks, as suggested by previous studies. This highlights that the inner edges of different planetary populations are likely regulated by distinct mechanisms.
Accepted for publication in A&A. Received: 3 January 2025; Accepted: 27 May 2025. (16 pages, 10 figures, 2 tables)
References in corpus (54)
- Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
- The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
- Stellar Multiplicity
- Planet Occurrence within 0.25 AU of Solar-type Stars from Kepler
- Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data
- Dynamical Outcomes of Planet-Planet Scattering
- The Occurrence and Architecture of Exoplanetary Systems
- Kepler planets: a tale of evaporation
- Passive irradiated circumstellar disks with an inner hole
- Planet-disk interaction and orbital evolution
- Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates
- Giant Planet Occurrence in the Stellar Mass-Metallicity Plane
- Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
- The Minimum-Mass Extrasolar Nebula: In-Situ Formation of Close-In Super-Earths
- Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25
- X-Shooter spectroscopy of young stellar objects: IV -- Accretion in low-mass stars and sub-stellar objects in Lupus
- Breaking the Chains: Hot Super-Earth systems from migration and disruption of compact resonant chains
- A stellar-mass-dependent drop in planet occurrence rates
- Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars
- About 30% of Sun-like Stars Have Kepler-like Planetary Systems: A Study of their Intrinsic Architecture
- The Impact of Stellar Multiplicity on Planetary Systems, I.: The Ruinous Influence of Close Binary Companions
- The Exoplanet Population Observation Simulator. I - The Inner Edges of Planetary Systems
- Exoplanet Orbital Eccentricities Derived From LAMOST-Kepler Analysis
- Observational Evidence for Tidal Destruction of Exoplanets
- A Millimeter Continuum Size-Luminosity Relationship for Protoplanetary Disks
- Hot Jupiters in binary star systems
- Emerging Trends in a Period-Radius Distribution of Close-in Planets
- On the migration of protogiant solid cores
- The thermal structure and the location of the snow line in the protosolar nebula: axisymmetric models with full 3-D radiative transfer
- On the Relation Between Hot Jupiters & the Roche Limit
- Magnetospheric Truncation, Tidal Inspiral, and the Creation of Short and Ultra-Short Period Planets
- Characterizing the Cool KOIs IV: Kepler-32 as a prototype for the formation of compact planetary systems throughout the Galaxy
- The Inner Rim Structures of Protoplanetary Discs
- Super-Earth masses sculpted by pebble isolation around stars of different masses
- Theory of Secular Chaos and Mercury's Orbit
- On the Metallicities of Kepler Stars
- A Super-Solar Metallicity For Stars With Hot Rocky Exoplanets
- Radiation hydrodynamical models of the inner rim in protoplanetary disks
- Dynamical rearrangement of super-Earths during disk dispersal I. Outline of the magnetospheric rebound model
- The inner radius of T Tauri disks estimated from near-infrared interferometry: the importance of scattered light
- Occurrence and Architecture of Kepler Planetary Systems as Functions of Stellar Mass and Effective Temperature
- Larger mutual inclinations for the shortest-period planets
- A Tale of Planet Formation: From Dust to Planets
- Star-planet interactions: I. Stellar rotation and planetary orbits
- Halting Planet Migration in the Evacuated Centers of Protoplanetary Disks
- Orbital Architectures of Planet-Hosting Binaries II. Low Mutual Inclinations Between Planetary and Stellar Orbits
- 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
- A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
- Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms
- Edge-of-the-Multis: Evidence for a Transition in the Outer Architectures of Compact Multi-Planet Systems
- The Role of Giant Impacts in Planet Formation
- The Origin of Universality in the Inner Edges of Planetary Systems
- Dynamical rearrangement of super-Earths during disk dispersal II. Assessment of the magnetospheric rebound model for planet formation scenarios
- Small and Close-In Planets are Uncommon Around A-type Stars