Table · dataset · 2026
TOI-5389 & TOI-5610 photometry & radial velocities
Listed in IVOA Registry (Virtual Observatory)
Brown dwarfs bridge the gap between stars and planets, providing valuable insight into both planetary and stellar-formation mechanisms.
Description
Yet the census of transiting brown-dwarf companions, in particular around M-dwarf stars, remains incomplete. We report the discovery of two transiting brown dwarfs around low-mass hosts using a combination of space- and ground-based photometry along with near-infrared radial velocities.
We characterize TOI-5389Ab (68.0_-2.2_^+2.2^M_J_) and TOI-5610b (40.4_-1.0_^+1.0^M_J_), two moderately massive brown dwarfs orbiting early M-dwarf hosts (Teff=3569+/-59K and 3618+/-59K, respectively). For TOI-5389Ab, the best fitting parameters are period P=10.40046+/-0.00002d, radius R_BD_=0.824_-0.031_^+0.033^R_J_, and low eccentricity e=0.0962_-0.0046_^+0.0027^. In particular, this constitutes one of the most extreme substellar-stellar companion-to-host mass ratios of q=0.150.
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For TOI-5610b, the best-fitting parameters are period P=7.95346+/-0.00002d, radius R_BD_=0.887_-0.031_^+0.031^R_J_, and moderate eccentricity e=0.354_-0.012_^+0.011^. Both targets are expected to have shallow, but potentially observable, occultations: <=500ppm in the Johnson K band. A statistical analysis of M-dwarf/BD systems reveals for the first time that those at short orbital periods (P<13d) exhibit a dearth of 13M_J_<M_BD_<40M_J_ companions (q<0.1) compared to those at slightly wider separations.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/246 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025AJ....169..246L ui.adsabs.harvard.edu/abs/2025AJ....169..246L ↗
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/169/246 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/169/246 | 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:infrared | source · 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 |