Table · dataset · 2024
EXPRES radial volocity for {tau} Ceti
Listed in IVOA Registry (Virtual Observatory)
To accurately characterize the planets a star may be hosting, stellar parameters must first be well determined. {tau}Ceti is a nearby solar analog and often a target for exoplanet searches.
Description
Uncertainties in the observed rotational velocities have made constraining {tau}Ceti's inclination difficult. For planet candidates from radial velocity (RV) observations, this leads to substantial uncertainties in the planetary masses, as only the minimum mass (msini) can be constrained with RV.
In this paper, we used new long-baseline optical interferometric data from the CHARA Array with the MIRC-X beam combiner and extreme precision spectroscopic data from the Lowell Discovery Telescope with EXPRES to improve constraints on the stellar parameters of {tau}Ceti. Additional archival data were obtained from a Tennessee State University Automatic Photometric Telescope and the Mount Wilson Observatory HK project.
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These new and archival data sets led to improved stellar parameter determinations, including a limb-darkened angular diameter of 2.019{+/-}0.012mas and rotation period of 46{+/-}4days. By combining parameters from our data sets, we obtained an estimate for the stellar inclination of 7{deg}{+/-}7{deg}. This nearly pole-on orientation has implications for the previously reported exoplanets.
An analysis of the system dynamics suggests that the planetary architecture described by Feng et al. may not retain long-term stability for low orbital inclinations. Additionally, the inclination of {tau}Ceti reveals a misalignment between the inclinations of the stellar rotation axis and the previously measured debris disk rotation axis (idisk=35{deg}{+/-}10{deg}).
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/123 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023AJ....166..123K ui.adsabs.harvard.edu/abs/2023AJ....166..123K ↗
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/166/123 ↗
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/166/123 | 15 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 |