A multi-band study and exploration of the radio wave-gamma-ray connection in 3C 84

G. F. Paraschos, V. Mpisketzis, J. Y. Kim, G. Witzel, T. P. Krichbaum, J. A. Zensus, M. A. Gurwell, A. Lähteenmäki, M. Tornikoski, S. Kiehlmann, A. C.S. Readhead

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

3 Sitaatiot (Scopus)
12 Lataukset (Pure)


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 γ-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 z91.5-GHz-=-22-645-Rs (2- -20 ×10-3-pc) upstream of the 3 mm radio core; at that position, the magnetic field amplitude is Bcore91.5-GHz-=-3-10 G. 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 γ-ray flares. Our results are in favour of the γ-ray emission being associated with the radio emission. We are able to tentatively connect the ejection of features identified at 43 and 86 GHz to prominent γ-ray flares. Finally, we computed the multiplicity parameter λ and the Michel magnetisation Ï M, and find that they are consistent with a jet launched by the Blandford & Znajek (1977, MNRAS, 179, 433) mechanism.

JulkaisuAstronomy and Astrophysics
DOI - pysyväislinkit
TilaJulkaistu - 3 tammik. 2023
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä


Sukella tutkimusaiheisiin 'A multi-band study and exploration of the radio wave-gamma-ray connection in 3C 84'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

Siteeraa tätä