Table · dataset · 2026
VLBI images of the FRII radio galaxy 3C 452
Listed in IVOA Registry (Virtual Observatory)
We present a comprehensive multifrequency VLBI analysis of the FRII high-excitation radio galaxy 3C 452, aiming to resolve and analyse for the first time its twin-jet structure on sub-parsec scales.
Description
Our dataset comprises High Sensitivity Array (HSA) observations at 4.9, 8.4, 15.4, 23.6, and 43.2GHz. Using fitting methods applied in both the visibility and image planes, we traced the jet expansion from scales of a few thousand up to nearly 10^5^ Schwarzschild radii on both the approaching and receding jets.
Our study provides the first detailed description of the twin-jet system in 3C 452 on VLBI scales. Both jet and counter-jet are resolved down to scales of a few thousand Schwarzschild radii, revealing a symmetric parabolic expansion with power-law indices k~0.66 for the jet and k~0.47 for the counter-jet. The jet-to-counter-jet intensity ratio remains nearly constant on larger scales but increases sharply within the inner 1-1.5mas.
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The brightness temperature analysis yields low Doppler factors indicating Doppler de-boosting due to the large viewing angle and/or a magnetically dominated jet base.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/709/A89 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026A&A...709A..89M ui.adsabs.harvard.edu/abs/2026A%26A...709A..89M ↗
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/709/a89 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Image 75%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/709/a89 | 13 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:radio | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].local:modality:image | 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 |