3C 84 multi-band study

DOI

Total intensity variability light curves offer a unique insight into the ongoing debate about the launching mechanism of jets. 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. 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.

Cone search capability for table J/A+A/669/A32/alma (ALMA 91.5 GHz)

Identifier
DOI http://doi.org/10.26093/cds/vizier.36690032
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/669/A32
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/669/A32
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/669/A32
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/669/A32
Provenance
Creator Paraschos G.F.; Mpisketzis V.; Kim J.-Y.; Witzel G.; Krichbaum T.P.,Zensus J.A.; Gurwell M.A.; Laehteenmaeki A.; Tornikoski M.; Kiehlmann S.,Readhead A.C.S.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; High Energy Astrophysics; Natural Sciences; Observational Astronomy; Physics