The relativistic parsec-scale jets of the blazars TXS 0506+056 and PKS 0502+049 and their possible association with gamma-ray flares and neutrino production
نویسندگان
چکیده
ABSTRACT The physical nature of the mechanism responsible for emission neutrinos in active galactic nuclei (AGNs) has been matter debate literature, with relativistic jets radio-loud AGNs as possible candidates to be sources high-energy neutrinos. most prominent candidate so far is blazar TXS 0506+056, which found associated neutrino event IceCube-170922A. Furthermore, IceCube reported an excess towards 0506+056 between September 2014 and March 2015, even though this association needs additional investigation, considering presence a nearby gamma-ray source, quasar PKS 0502+049. Motivated by this, we studied parsec-scale structures 0502+049 through radio interferometry at 8 15 GHz. We identified twelve jet components seven reliable show superluminal speeds ranging from 9.5c 66c case 14.3c 59c 0502+049, were used estimate lower (upper) limit Lorentz factor (jet viewing angle) both sources. A novel approach using simultaneously brightness temperature core region apparent allowed us infer basic parameters distinct epochs. also that emergence new coincides occurrence flares. Interestingly, two these coincidences one seems correlated events detected Observatory.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2021
ISSN: ['0035-8711', '1365-8711', '1365-2966']
DOI: https://doi.org/10.1093/mnras/stab3022