Table · dataset · 2024
TESS/HIRES radial velocity follow up of TOI-1824
Listed in IVOA Registry (Virtual Observatory)
We confirm a massive sub-Neptune-sized planet on a P=22.8 days orbit around the star TOI-1824 (Teff=5200 K, V=9.7 mag).
Description
TESS first identified TOI-1824 b (formerly TOI-1824.01) as an object of interest in 2020 April after two transits in Sector 22 were matched with a single transit in Sector 21. TOI-1824 was subsequently targeted for ground-based Doppler monitoring with Keck-HIRES and APF-Levy.
Using a joint model of the TESS photometry, radial velocities, and Ca ii H and K emission measurements as an activity indicator, we find that TOI-1824b is an unusually dense sub-Neptune. The planet has a radius Rp=2.63{+/-}0.15R{Earth} and mass Mp=18.5{+/-}3.2M{Earth}, implying a bulk density of 5.6{+/-}1.4g/cm^3^. TOI-1824 b's mass and radius situate it near a small group of "superdense sub-Neptunes" (Rp<~3R{Earth} and Mp>~20M{Earth}).
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While the formation mechanism of superdense sub-Neptunes is a mystery, one possible explanation is the constructive collision of primordial icy cores; such giant impacts would drive atmospheric escape and could help explain these planets' apparent lack of massive envelopes. We discuss TOI-1824b in the context of these overdense planets, whose unique location in the exoplanet mass-radius plane make them a potentially valuable tracer of planet formation.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/282 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024AJ....167..282L ui.adsabs.harvard.edu/abs/2024AJ....167..282L ↗
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/167/282 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/167/282 | 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 | |
| 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 |