A ring accelerator? Unusual jet dynamics in the IceCube candidate PKS 1502+106
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F21%3AA0000140" target="_blank" >RIV/47813059:19630/21:A0000140 - isvavai.cz</a>
Result on the web
<a href="https://academic.oup.com/mnras/article-abstract/503/3/3145/6174669?redirectedFrom=fulltext" target="_blank" >https://academic.oup.com/mnras/article-abstract/503/3/3145/6174669?redirectedFrom=fulltext</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stab589" target="_blank" >10.1093/mnras/stab589</a>
Alternative languages
Result language
angličtina
Original language name
A ring accelerator? Unusual jet dynamics in the IceCube candidate PKS 1502+106
Original language description
On 2019/07/30.86853 UT, IceCube detected a high-energy astrophysical neutrino candidate. The Flat Spectrum Radio Quasar PKS 1502+106 is located within the 50 per cent uncertainty region of the event. Our analysis of 15 GHz Very Long Baseline Array (VLBA) and astrometric 8 GHz VLBA data, in a time span prior and after the IceCube event, reveals evidence for a radio ring structure that develops with time. Several arc-structures evolve perpendicular to the jet ridge line. We find evidence for precession of a curved jet based on kinematic modelling and a periodicity analysis. An outflowing broad line region (BLR) based on the C IV line emission (Sloan Digital Sky Survey) is found. We attribute the atypical ring to an interaction of the precessing jet with the outflowing material. We discuss our findings in the context of a spine-sheath scenario where the ring reveals the sheath and its interaction with the surroundings (narrow line region, NLR, clouds). We find that the radio emission is correlated with the gamma-ray emission, with radio lagging the gamma-rays. Based on the gamma-ray variability time-scale, we constrain the gamma-ray emission zone to the BLR (30-200 r(g)) and within the jet launching region. We discuss that the outflowing BLR provides the external radiation field for gamma-ray production via external Compton scattering. The neutrino is most likely produced by proton-proton interaction in the blazar zone (beyond the BLR), enabled by episodic encounters of the jet with dense clouds, i.e. some molecular cloud in the NLR.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/EF19_073%2F0016951" target="_blank" >EF19_073/0016951: Improving the quality of the internal grant scheme of the Silesian University in Opava</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
503
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
34
Pages from-to
3145-3178
UT code for WoS article
000649000600003
EID of the result in the Scopus database
2-s2.0-85116850354