Table · dataset · 2026
Study of dipolar magnetic field for 2673 stars
Listed in IVOA Registry (Virtual Observatory)
During the last two decades, thousands of stellar magnetic fields have been measured using the Zeeman-Doppler imaging method.
Description
No unified database gathers all measurements in an homogeneous way. The magnetic field of a star is a key ingredient of its plasma interactions with companions, either other stars or exoplanets, and of its radio and X-ray emissions.
The dipolar component of a star's magnetic field, in particular, allows one to estimate the magnetic (Poynting) flux carried away by the stellar wind, that sweeps across exoplanets or their magnetospheres and is believed to drive electron acceleration and radio emissions. Here we aim at building a database of known stellar magnetic fields, inferring the dipolar component of the field, and we present the methods that we have developed to estimate a star's magnetic field when no measurement is available.
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We have compiled published Zeeman-Doppler measurements of stellar magnetic fields into a database, showing how to extract the dipolar component from various measurements. We have included several other stellar parameters in the database (mass, radius, rotation period, effective temperature, age, V-band magnitude). Then we have built and compared two extrapolation methods to infer stellar magnetic fields from the other stellar parameters: a K-Nearest Neighbors method and a neural network trained on the database.
We present a database of over 2600 stars with an estimate of their dipolar magnetic field, and methods to predict such a parameter for other stars where it is not measured, to much better than an order of magnitude.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A16 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026A&A...710A..16D ui.adsabs.harvard.edu/abs/2026A%26A...710A..16D ↗
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/a%2Ba/710/a16 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Imaging 75%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/710/a16 | 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].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 |