Table · dataset · 2021
The TESS-Keck Survey. II. RVs of TOI-561
Listed in IVOA Registry (Virtual Observatory)
We report the discovery of TOI-561, a multiplanet system in the galactic thick disk that contains a rocky, ultra-short-period planet.
Description
This bright (V=10.2) star hosts three small transiting planets identified in photometry from the NASA TESS mission: TOI-561b (TOI-561.02, P=0.44days, Rp=1.45{+/-}0.11R{Earth}), c (TOI-561.01, P=10.8days, Rp=2.90{+/-}0.13R{Earth}), and d (TOI-561.03, P=16.3days, Rp=2.32{+/-}0.16R{Earth}).
The star is chemically ([Fe/H]=-0.41{+/-}0.05, [{alpha}/Fe]=+0.23{+/-}0.05) and kinematically consistent with the galactic thick-disk population, making TOI-561 one of the oldest (10{+/-}3Gyr) and most metal-poor planetary systems discovered yet. We dynamically confirm planets b and c with radial velocities from the W.M.Keck Observatory High Resolution Echelle Spectrometer. Planet b has a mass and density of 3.2{+/-}0.8M{Earth} and 5.5_-1.6_^+2.0^g/cm^3^, consistent with a rocky composition.
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Its lower- than-average density is consistent with an iron-poor composition, although an Earth-like iron-to-silicates ratio is not ruled out. Planet c is 7.0{+/-}2.3M{Earth} and 1.6{+/-}0.6g/cm^3^, consistent with an interior rocky core overlaid with a low-mass volatile envelope. Several attributes of the photometry for planet d (which we did not detect dynamically) complicate the analysis, but we vet the planet with high-contrast imaging, ground-based photometric follow-up, and radial velocities.
TOI-561b is the first rocky world around a galactic thick-disk star confirmed with radial velocities and one of the best rocky planets for thermal emission studies.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/56 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021AJ....161...56W ui.adsabs.harvard.edu/abs/2021AJ....161...56W ↗
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/161/56 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Imaging 75%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/161/56 | 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 | |
| concepts[modality].local:modality:imaging | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| 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 |