Table · dataset · 2026
Stellar and planetary param. of M-dwarf systems
Listed in IVOA Registry (Virtual Observatory)
Planetary radii are derived for 218 exoplanets orbiting 161 M dwarf stars.
Description
Stellar radii are based on an analysis of APOGEE high-resolution near-IR spectra for a subsample of the M dwarfs; these results are used to define a stellar radius-M_Ks_ calibration that is applied to the sample of M-dwarf planet hosts. The planetary radius distribution displays a gap over Rp~1.6-2.0R_{Earth}_, bordered by two peaks at Rp~1.2-1.6R_{Earth}_ (super-Earths) and 2.0-2.4R_{Earth}_ (sub-Neptunes).
The radius gap is nearly constant with exoplanetary orbital period (a power-law slope of m=+0.01_-0.04_^+0.03^), which is different (2{sigma}-3{sigma}) from m~-0.10 found previously for FGK dwarfs. This flat slope agrees with pebble accretion models, which include photoevaporation and inward orbital migration. The radius gap as a function of insolation is approximately constant over the range of Sp~20-250S_{Earth}_.
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The Rp-Porb plane exhibits a sub-Neptune desert for Porb<2-days, which appears at Sp>120S_{Earth}_, being significantly smaller than Sp>650S_{Earth}_ found in the FGK planet-hosts, indicating that the appearance of the sub-Neptune desert is a function of host- star mass. Published masses for 51 exoplanets are combined with our radii to determine densities, which exhibit a gap at {rho}_p_~0.9{rho}_{Earth}_, separating rocky exoplanets from sub-Neptunes.
The density distribution within the sub-Neptune family itself reveals two peaks, at {rho}_p_~0.4{rho}_{Earth}_ and ~0.7{rho}_{Earth}_. Comparisons to planetary models find that the low-density group are gas-rich sub-Neptunes, while the group at <{rho}_p_>~0.7{rho}_{Earth}_ likely consists of volatile-rich water worlds.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/993/233 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025ApJ...993..233W ui.adsabs.harvard.edu/abs/2025ApJ...993..233W ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/apj/993/233 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/993/233 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |