Table · dataset · 2023
Spectroscopic data of TESS objects with LAMOST
Listed in IVOA Registry (Virtual Observatory)
Stellar parameters and magnetic activity are important for the understanding of stellar physics and dynamo theory.
Description
We have used LAMOST spectroscopic surveys to study stellar parameters and magnetic activity properties of TESS objects. There are 46684 spectra of 31385 TESS objects in the LAMOST low-resolution spectral survey.
We have calculated equivalent widths of CaII H and K, and H{alpha} lines, and discussed the relationship of chromospheric activity with stellar temperature. There are 25710 spectra of 10404 stars with repeated low-resolution observations. We found that there are 694 objects with variations of the H{alpha} line and 1406 objects with varying radial velocities.
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Moreover, there are 14099 spectra of 5834 TESS objects in the LAMOST medium-resolution survey, of which there are 2666 objects with H{alpha} variations and 1480 objects with variation in radial velocities. By using the light curves of the TESS objects in the LAMOST field, we detected 4269 flare events and determined their flare parameters. We have confirmed that the fraction of the flare stars increases as stellar temperature decreases.
There is also an observed relationship between the flare energy and chromospheric activity. We have calculated the power-law index between the flare energy and decay time using TESS data to be 0.27(0.01), which can be explained by the magnetic reconnection theory. We confirmed that R_H{alpha}^'^ is stable for Rossby number R<0.1 and decreases with the increase of Rossby number R>0.1.
There is a positive correlation between the brightness variation amplitude due to star spots from TESS and the H{alpha} intensity from LAMOST.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/264/17 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023ApJS..264...17Z ui.adsabs.harvard.edu/abs/2023ApJS..264...17Z ↗
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/apjs/264/17 ↗
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/apjs/264/17 | 13 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 |