Table · dataset · 2021
Radial Velocities of TOI-811 and TOI-852
Listed in IVOA Registry (Virtual Observatory)
We report the discovery of two transiting brown dwarfs (BDs), TOI-811b and TOI-852b, from NASA's Transiting Exoplanet Survey Satellite mission.
Description
These two transiting BDs have similar masses but very different radii and ages. Their host stars have similar masses, effective temperatures, and metallicities.
The younger and larger transiting BD is TOI-811b at a mass of Mb=59.9{+/-}13.0M_J_ and radius of Rb=1.26{+/-}0.06R_J_, and it orbits its host star in a period of P=25.16551{+/-}0.00004days. We derive the host star's age of 93_-29_^+61^Myr from an application of gyrochronology. The youth of this system, rather than external heating from its host star, is why this BD's radius is relatively large.
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This constraint on the youth of TOI-811b allows us to test substellar mass-radius evolutionary models at young ages where the radius of BDs changes rapidly. TOI-852b has a similar mass at Mb=53.7{+/-}1.4M_J_ but is much older (4 or 8Gyr, based on bimodal isochrone results of the host star) and is also smaller with a radius of Rb=0.83{+/-}0.04R_J_. TOI-852b's orbital period is P=4.94561{+/-}0.00008days.
TOI-852b joins the likes of other old transiting BDs that trace out the oldest substellar mass-radius evolutionary models where contraction of the BD's radius slows and approaches a constant value. Both host stars have a mass of M_*_=1.32M{sun}{+/-}0.05 and differ in their radii, Teff, and [Fe/H], with TOI-811 having R_*_=1.27{+/-}0.09R{sun}, Teff=6107{+/-}77K, and [Fe/H]=0.40{+/-}0.09 and TOI-852 having R_*_=1.71{+/-}0.04R{sun}, Teff=5768{+/-}84K, and [Fe/H]=0.33{+/-}0.09.
We take this opportunity to examine how TOI-811b and TOI-852b serve as test points for young and old substellar isochrones, respectively.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/97 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021AJ....161...97C ui.adsabs.harvard.edu/abs/2021AJ....161...97C ↗
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/161/97 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 71%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/161/97 | 14 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 (71%) |
| 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 |