Table · dataset · 2024
THYME. IX. MELANGE-4 association members
Listed in IVOA Registry (Virtual Observatory)
We report the discovery and characterization of a nearby (~85pc), older (27{+/-}3Myr), distributed stellar population near Lower Centaurus Crux (LCC), initially identified by searching for stars comoving with a candidate transiting planet from TESS (HD109833; TOI1097).
Description
We determine the association membership using Gaia kinematics, color-magnitude information, and rotation periods of candidate members. We measure its age using isochrones, gyrochronology, and Li depletion.
While the association is near known populations of LCC, we find that it is older than any previously found LCC subgroup (10-16Myr), and distinct in both position and velocity. In addition to the candidate planets around HD109833, the association contains four directly imaged planetary-mass companions around three stars, YSES-1, YSES-2, and HD95086, all of which were previously assigned membership in the younger LCC. Using the Notch pipeline, we identify a second candidate transiting planet around HD109833.
Read the rest (2 more)
We use a suite of ground-based follow-up observations to validate the two transit signals as planetary in nature. HD109833 b and c join the small but growing population of <100Myr transiting planets from TESS. HD109833 has a rotation period and Li abundance indicative of a young age (<~100Myr), but a position and velocity on the outskirts of the new population, lower Li levels than similar members, and a color-magnitude diagram position below model predictions for 27Myr.
So, we cannot reject the possibility that HD109833 is a young field star coincidentally nearby the population.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/85 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023AJ....165...85W ui.adsabs.harvard.edu/abs/2023AJ....165...85W ↗
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/165/85 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 75%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/165/85 | 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 (75%) |
| 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 |