A near magnetic-to-kinetic energy equipartition flare from the relativistic jet in AO 0235 + 164 during 2013–2019

Whee Yeon Cheong, Sang Sung Lee*, Sang Hyun Kim, Sincheol Kang, Jae Young Kim, Bindu Rani, Anthony C.S. Readhead, Sebastian Kiehlmann, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, Iván Agudo, Antonio Fuentes, Efthalia Traianou, Juan Escudero, Clemens Thum, Ioannis Myserlis, Carolina Casadio, Mark Gurwell

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

66 Lataukset (Pure)

Abstrakti

We present the multiwavelength flaring activity of the blazar AO 0235 + 164 during its recent active period from 2013 to 2019. From a discrete correlation function analysis, we find a significant (> 95 per cent) correlation between radio and gamma-ray light curves with flares at longer wavelengths following flares at shorter wavelengths. We identify a new jet component in 43 GHz Very Long Baseline Array data that was ejected from the radio core on MJD 57246+−3026 (2015 August 12), during the peak of the 2015 radio flare. From the analysis of the jet component, we derived a Doppler factor of δvar = 28.5 ± 8.4, a bulk Lorentz factor of Γ = 16.8+−33.16, and an intrinsic viewing angle of θv = 1.42+−01.5207 degrees. Investigation of the quasi-simultaneous radio data revealed a partially absorbed spectrum with the turnover frequency varying in the range of 10−70 GHz and the peak flux density varying in the range of 0.7−4 Jy. We find the synchrotron self-absorption magnetic field strength to be BSSA = 15.3+−1412.06 mG at the peak of the 2015 radio flare, which is comparable to the equipartition magnetic field strength of BEQ = 43.6+−1010.46 mG calculated for the same epoch. Additional analysis of the radio emission region in the relativistic jet of AO 0235 + 164 suggests that it did not significantly deviate from equipartition during its recent flaring activity.

AlkuperäiskieliEnglanti
Sivut882-894
Sivumäärä13
JulkaisuMonthly Notices of the Royal Astronomical Society
Vuosikerta527
Numero1
Varhainen verkossa julkaisun päivämäärä25 lokak. 2023
DOI - pysyväislinkit
TilaJulkaistu - 1 tammik. 2024
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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