Table · dataset · 2025
RVs of TIC 56913729 & TIC 97729372 from LAMOST DR10
Listed in IVOA Registry (Virtual Observatory)
Utilizing data from the Transiting Exoplanet Survey Satellite (TESS) and LAMOST, we present a photometric and spectroscopic investigation of two new K-type low-mass eclipsing binaries, TIC 56913729 and TIC 97729372.
Description
Our analysis yields masses and radii for TIC 56913729, M_1_=0.7822+/-0.0054M_{sun}_, R_1_=0.7891+/-0.0021R_{sun}_, and M_2_=0.7532+/-0.0052M_{sun}_, R_2_=0.7648+/-0.0021R_{sun}_. For TIC 97729372, the results are M_1_=0.6410+/-0.0058M_{sun}_, R_1_=0.6537+/-0.0069R_{sun}_ and M_2_=0.6480+/-0.0058M_{sun}_, R_2_=0.6418+/-0.0062R_{sun}_.
In addition, by analyzing the out-of-eclipse starspot light variations, the lower limit of starspot coverage varies in different TESS sectors from 2% to 12%. We observed a clear radius inflation in the mass-radius diagram for both stars, when plotted against PARSEC and SPOT isochrones with 1Gyr. Yet, this apparent discrepancy disappears when the comparison is made with either an older PARSEC isochrone (12Gyr) or a SPOT isochrone (250Myr) with high starspot coverage (Fspot ~85%), which is significantly higher than the typical starspot coverage deduced from light curves.
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Due to the lack of strong age constraints, we cannot firmly exclude that the observed radius inflation may be the result of a post-main-sequence evolutionary effect, although the spectral and kinematic properties of these stars are hardly compatible with 10-12Myr old (Pop II) stars. It is more likely that the radius inflation is produced by the strong magnetic activity in these rapidly rotating stars, even if it is impossible to infer the actual total spot coverage, due to the age uncertainties.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/253 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024AJ....168..253P ui.adsabs.harvard.edu/abs/2024AJ....168..253P ↗
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/168/253 ↗
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/168/253 | 12 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 |