%0 Generic %1 plavin2020observational %A Plavin, A. V. %A Kovalev, Y. Y. %A Kovalev, Y. A. %A Troitsky, S. V. %D 2020 %K IceCube alert neutrino plain radio systematics %R 10.3847/1538-4357/ab86bd %T Observational evidence for the origin of high-energy neutrinos in parsec-scale nuclei of radio-bright active galaxies %U http://arxiv.org/abs/2001.00930 %X Observational information on high-energy astrophysical neutrinos is being continuously collected by the IceCube observatory. However, the sources of neutrinos are still unknown. In this study, we use radio very-long-baseline interferometry (VLBI) data for a complete VLBI-flux-density limited sample of active galactic nuclei (AGN). We address the problem of the origin of astrophysical neutrinos with energies above 200 TeV in a statistical manner. It is found that AGN positionally associated with IceCube events have typically stronger parsec-scale cores than the rest of the sample. The post-trial probability of a chance coincidence is 0.2%. We select the four strongest AGN as highly probable associations: 3C 279, NRAO 530, PKS 1741-038, and PKS 2145+067. Moreover, we find an increase of radio emission at frequencies above 10 GHz around neutrino arrival times for several other VLBI-selected AGN on the basis of RATAN-600 monitoring. The most pronounced example of such behavior is PKS 1502+106. We conclude that AGN with bright Doppler-boosted jets constitute an important population of neutrino sources. High-energy neutrinos are produced in their central parsec-scale regions, probably in proton-photon interactions at or around the accretion disk. Radio-bright AGN that are likely associated with neutrinos have very diverse gamma-ray properties suggesting that gamma-rays and neutrinos may be produced in different regions of AGN and not directly related. A small viewing angle of the jet-disk axis is, however, required to detect either of them.

@misc{plavin2020observational, abstract = {Observational information on high-energy astrophysical neutrinos is being continuously collected by the IceCube observatory. However, the sources of neutrinos are still unknown. In this study, we use radio very-long-baseline interferometry (VLBI) data for a complete VLBI-flux-density limited sample of active galactic nuclei (AGN). We address the problem of the origin of astrophysical neutrinos with energies above 200 TeV in a statistical manner. It is found that AGN positionally associated with IceCube events have typically stronger parsec-scale cores than the rest of the sample. The post-trial probability of a chance coincidence is 0.2%. We select the four strongest AGN as highly probable associations: 3C 279, NRAO 530, PKS 1741-038, and PKS 2145+067. Moreover, we find an increase of radio emission at frequencies above 10 GHz around neutrino arrival times for several other VLBI-selected AGN on the basis of RATAN-600 monitoring. The most pronounced example of such behavior is PKS 1502+106. We conclude that AGN with bright Doppler-boosted jets constitute an important population of neutrino sources. High-energy neutrinos are produced in their central parsec-scale regions, probably in proton-photon interactions at or around the accretion disk. Radio-bright AGN that are likely associated with neutrinos have very diverse gamma-ray properties suggesting that gamma-rays and neutrinos may be produced in different regions of AGN and not directly related. A small viewing angle of the jet-disk axis is, however, required to detect either of them.}, added-at = {2022-07-13T16:52:51.000+0200}, author = {Plavin, A. V. and Kovalev, Y. Y. and Kovalev, Y. A. and Troitsky, S. V.}, biburl = {https://www.bibsonomy.org/bibtex/2a624fba021497e08a852a9a765a71d6b/jnecker}, description = {[2001.00930] Observational evidence for the origin of high-energy neutrinos in parsec-scale nuclei of radio-bright active galaxies}, doi = {10.3847/1538-4357/ab86bd}, interhash = {c8f051bab0ac7debdc99da19db598b2f}, intrahash = {a624fba021497e08a852a9a765a71d6b}, keywords = {IceCube alert neutrino plain radio systematics}, note = {cite arxiv:2001.00930Comment: 19 pages, 5 figures, 3 tables; accepted to ApJ; v2: extended discussion, added a figure and electronic table; v3: fixed typo in a source name}, timestamp = {2022-07-13T16:52:51.000+0200}, title = {Observational evidence for the origin of high-energy neutrinos in parsec-scale nuclei of radio-bright active galaxies}, url = {http://arxiv.org/abs/2001.00930}, year = 2020 }