Table · dataset · 2023
3C 84 multi-band study
Listed in IVOA Registry (Virtual Observatory)
Total intensity variability light curves offer a unique insight into the ongoing debate about the launching mechanism of jets.
Description
For this work, we utilised the availability of radio and gamma-ray light curves over a few decades of the radio source 3C 84 (NGC 1275). We calculated the multi-band time-lags between the flares identified in the light curves via discrete cross- correlation and Gaussian process regression.
We find that the jet particle and magnetic field energy densities are in equipartition (kr=1.08+/-0.18). The jet apex is located z_91.5GHz_=22-645Rs (2-20x10^-3^pc) upstream of the 3mm radio core; at that position, the magnetic field amplitude is B91.5GHz core =3-10G. Our results are in good agreement with earlier studies that utilised very-long-baseline interferometry.
Read the rest (2 more)
Furthermore, we investigated the temporal relation between the ejection of radio and gamma-ray flares. Our results are in favour of the gamma-ray emission being associated with the radio emission. We are able to tentatively connect the ejection of features identified at 43 and 86GHz to prominent gamma-ray flares.
Finally, we computed the multiplicity parameter {lambda} and the Michel magnetisation {sigma}M, and find that they are consistent with a jet launched by the Blandford & Znajek (2007MNRAS.377L..49K) mechanism.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/669/A32 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023A&A...669A..32P ui.adsabs.harvard.edu/abs/2023A%26A...669A..32P ↗
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/669/a32 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/669/a32 | 14 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 (72%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:gamma-ray | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:radio | 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 |