Table · dataset · 2024
Transit time for planets in LHS 1678 System
Listed in IVOA Registry (Virtual Observatory)
The nearby LHS-1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history.
Description
The host star occupies a narrow "gap" in the Hertzsprung-Russell diagram lower main sequence, associated with the M-dwarf fully convective boundary and long-term luminosity fluctuations. This system is one of only about a dozen M-dwarf multiplanet systems to date that hosts an ultra-short-period planet (USP).
Here we validate and characterize a third planet in the LHS-1678 system using TESS Cycle 1 and 3 data and a new ensemble of ground-based light curves. LHS-1678d is a 0.98{+/-}0.07R{Earth} planet in a 4.97day orbit, with an insolation flux of 9.1_-0.8_^+0.9^S{Earth}. These properties place it near 4:3 mean motion resonance with LHS-1678c and in company with LHS-1678c in the Venus zone.
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LHS 1678 c and d are also twins in size and predicted mass, making them a powerful duo for comparative exoplanet studies. LHS-1678d joins its siblings as another compelling candidate for atmospheric measurements with the JWST and mass measurements using high-precision radial velocity techniques. Additionally, USP LHS-1678b breaks the "peas-in-a-pod" trend in this system although additional planets could fill in the "pod" beyond its orbit.
LHS-1678's unique combination of system properties and their relative rarity among the ubiquity of compact multiplanet systems around M-dwarfs makes the system a valuable benchmark for testing theories of planet formation and evolution.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/255 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024AJ....167..255S ui.adsabs.harvard.edu/abs/2024AJ....167..255S ↗
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/aj/167/255 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 69%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/167/255 | 6 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (69%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · 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 |